diff --git a/.github/workflows/test-and-publish.yml b/.github/workflows/test-and-publish.yml
index 47d77be..a0fc13b 100644
--- a/.github/workflows/test-and-publish.yml
+++ b/.github/workflows/test-and-publish.yml
@@ -72,7 +72,7 @@ jobs:
 
       - name: Publish test coverage
         uses: easingthemes/ssh-deploy@v2.1.4
-        env:
+        with:
           SOURCE: "coverage"
           SSH_PRIVATE_KEY: ${{ secrets.SSH_KEY }}
           REMOTE_HOST: ${{ secrets.SSH_HOST }}
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 3143317..41758a1 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,15 @@
 ## Change log
 
+## 2.2.2 - 2023-12-30
+
+### Added
+
+* Bump development dependencies
+
+### Fixed
+
+* Unsupported JS constructs for legacy node versions
+
 ## 2.2.1 - 2023-09-13
 
 ### Added
diff --git a/README.md b/README.md
index 6933b40..21bb76e 100644
--- a/README.md
+++ b/README.md
@@ -149,28 +149,6 @@ You can read more about this [here](https://nodejs.org/api/crypto.html#crypto_cr
 
 As `n-digit-token` is dependent on `crypto.randomBytes()` it uses libuv's threadpool, which can have performance implications for some applications. Please refer to the documentation [here](https://nodejs.org/api/crypto.html#crypto_crypto_randombytes_size_callback) for more information.
 
-#### Time complexity chart
-
-To test the consistency of the speed of the algorithm on a modern CPU, `n-digit-token` was called to generate a token of length `1` to `1000` on an `AMD EPYC 7000` clocked at `2.2 GHz`. This test was repeated a `1000` times on different occasions and the times were averaged.
-
-The below chart represents the time it takes (in nanoseconds) to generate a token of length `x`:
-
-<p align="center">
-  Time taken per token length
-</p>
-
-[![Time complexity](./img/time-complexity.svg)](https://raw.githubusercontent.com/almasen/n-digit-token/c3a66bbf99516da413a757433c6ed2ee9d8e76c4/img/time-complexity.svg)
-
-<p align="center">
-  <small>
-  y-axis shows time in nanoseconds / token length (AMD EPYC 7000 @ 2.2 GHz)
-  </small>
-</p>
-
-From this test and the diagram above it is shown that for up to `~100` digits the running time is constant, for larger tokens, the time taken is growing by gradually more.
-
-As this algorithm is not designed to be used as a pseudo random digit stream, but to generate fixed-size tokens, this matches expectations. That said, it would be technically feasible to generate a large number of short tokens via this module that still runs in constant time, and then concatenate the tokens to a large stream.
-
 ### Memory usage
 
 By default the algorithm ensures modulo precision whilst also balancing performance and memory usage.
@@ -405,10 +383,6 @@ const token = gen(6, { customByteStream: randomBytes });
 
 Please note that this is option has only been tested with `crypto-browserify` and inappropriate use may lead to various unintended consequences.
 
-### options.avoidModuloBias (deprecated)
-
-This setting has been deprecated as of `n-digit-token@v2.x` since the algorithm avoids modulo bias by default. Therefore, the use of this option is now unnecessary and ignored by the application.
-
 ## Test
 
 Install the `devDependencies` and run `npm test` for the module tests.
diff --git a/img/time-complexity.svg b/img/time-complexity.svg
deleted file mode 100644
index 93743d9..0000000
--- a/img/time-complexity.svg
+++ /dev/null
@@ -1 +0,0 @@
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x="1400" y="1003" text-anchor="start" dominant-baseline="alphabetic" fill-opacity="1">800digits</text><text fill="none" stroke="rgb(33,33,33)" font-family="geogebra-sans-serif, sans-serif" font-size="12px" font-style="normal" font-weight="normal" text-decoration="normal" x="1400" y="1003" text-anchor="start" dominant-baseline="alphabetic" stroke-opacity="1" stroke-linejoin="bevel" stroke-miterlimit="10" stroke-width="3">800digits</text><text fill="rgb(255,255,255)" stroke="none" font-family="geogebra-sans-serif, sans-serif" font-size="12px" font-style="normal" font-weight="normal" text-decoration="normal" x="1400" y="1003" text-anchor="start" dominant-baseline="alphabetic" fill-opacity="1">800digits</text><path fill="none" stroke="rgb(255,255,255)" paint-order="fill stroke markers" d=" M 1426.5 987.5 L 1426.5 990.5" stroke-opacity="1" stroke-miterlimit="10"/><path fill="none" stroke="rgb(255,255,255)" paint-order="fill stroke markers" d=" M 1469.5 987.5 L 1469.5 989.5" stroke-opacity="1" stroke-miterlimit="10"/><text fill="rgb(255,255,255)" stroke="none" font-family="geogebra-sans-serif, sans-serif" font-size="12px" font-style="normal" font-weight="normal" text-decoration="normal" x="1486" y="1003" text-anchor="start" dominant-baseline="alphabetic" fill-opacity="1">850digits</text><text fill="none" stroke="rgb(33,33,33)" font-family="geogebra-sans-serif, sans-serif" font-size="12px" font-style="normal" font-weight="normal" text-decoration="normal" x="1486" y="1003" text-anchor="start" dominant-baseline="alphabetic" stroke-opacity="1" stroke-linejoin="bevel" stroke-miterlimit="10" stroke-width="3">850digits</text><text fill="rgb(255,255,255)" stroke="none" font-family="geogebra-sans-serif, sans-serif" font-size="12px" font-style="normal" font-weight="normal" text-decoration="normal" x="1486" y="1003" text-anchor="start" dominant-baseline="alphabetic" fill-opacity="1">850digits</text><path fill="none" stroke="rgb(255,255,255)" paint-order="fill stroke markers" d=" M 1512.5 987.5 L 1512.5 990.5" stroke-opacity="1" stroke-miterlimit="10"/><path fill="none" stroke="rgb(255,255,255)" paint-order="fill stroke markers" d=" M 1555.5 987.5 L 1555.5 989.5" stroke-opacity="1" stroke-miterlimit="10"/><text fill="rgb(255,255,255)" stroke="none" font-family="geogebra-sans-serif, sans-serif" font-size="12px" font-style="normal" font-weight="normal" text-decoration="normal" x="1572" y="1003" text-anchor="start" dominant-baseline="alphabetic" fill-opacity="1">900digits</text><text fill="none" stroke="rgb(33,33,33)" font-family="geogebra-sans-serif, sans-serif" font-size="12px" font-style="normal" font-weight="normal" text-decoration="normal" x="1572" y="1003" text-anchor="start" dominant-baseline="alphabetic" stroke-opacity="1" stroke-linejoin="bevel" stroke-miterlimit="10" stroke-width="3">900digits</text><text fill="rgb(255,255,255)" stroke="none" font-family="geogebra-sans-serif, sans-serif" font-size="12px" font-style="normal" font-weight="normal" text-decoration="normal" x="1572" y="1003" text-anchor="start" dominant-baseline="alphabetic" fill-opacity="1">900digits</text><path fill="none" stroke="rgb(255,255,255)" paint-order="fill stroke markers" d=" M 1598.5 987.5 L 1598.5 990.5" stroke-opacity="1" stroke-miterlimit="10"/><path fill="none" stroke="rgb(255,255,255)" paint-order="fill stroke markers" d=" M 1641.5 987.5 L 1641.5 989.5" stroke-opacity="1" stroke-miterlimit="10"/><text fill="rgb(255,255,255)" stroke="none" font-family="geogebra-sans-serif, sans-serif" font-size="12px" font-style="normal" font-weight="normal" text-decoration="normal" x="1658" y="1003" text-anchor="start" dominant-baseline="alphabetic" fill-opacity="1">950digits</text><text fill="none" stroke="rgb(33,33,33)" font-family="geogebra-sans-serif, sans-serif" font-size="12px" font-style="normal" font-weight="normal" text-decoration="normal" x="1658" y="1003" text-anchor="start" dominant-baseline="alphabetic" stroke-opacity="1" stroke-linejoin="bevel" stroke-miterlimit="10" stroke-width="3">950digits</text><text fill="rgb(255,255,255)" stroke="none" font-family="geogebra-sans-serif, sans-serif" font-size="12px" font-style="normal" font-weight="normal" text-decoration="normal" x="1658" y="1003" text-anchor="start" dominant-baseline="alphabetic" fill-opacity="1">950digits</text><path fill="none" stroke="rgb(255,255,255)" paint-order="fill stroke markers" d=" M 1684.5 987.5 L 1684.5 990.5" stroke-opacity="1" stroke-miterlimit="10"/><path fill="none" stroke="rgb(255,255,255)" paint-order="fill stroke markers" d=" M 1727.5 987.5 L 1727.5 989.5" stroke-opacity="1" stroke-miterlimit="10"/><text fill="rgb(255,255,255)" stroke="none" font-family="geogebra-sans-serif, sans-serif" font-size="12px" font-style="normal" font-weight="normal" text-decoration="normal" x="1741" y="1003" text-anchor="start" dominant-baseline="alphabetic" fill-opacity="1">1000digits</text><text fill="none" stroke="rgb(33,33,33)" font-family="geogebra-sans-serif, sans-serif" font-size="12px" font-style="normal" font-weight="normal" text-decoration="normal" x="1741" y="1003" text-anchor="start" dominant-baseline="alphabetic" stroke-opacity="1" stroke-linejoin="bevel" stroke-miterlimit="10" stroke-width="3">1000digits</text><text fill="rgb(255,255,255)" stroke="none" font-family="geogebra-sans-serif, sans-serif" font-size="12px" font-style="normal" font-weight="normal" text-decoration="normal" x="1741" y="1003" text-anchor="start" dominant-baseline="alphabetic" fill-opacity="1">1000digits</text><path fill="none" stroke="rgb(255,255,255)" paint-order="fill stroke markers" d=" M 1770.5 987.5 L 1770.5 990.5" stroke-opacity="1" stroke-miterlimit="10"/><path fill="none" stroke="rgb(255,255,255)" paint-order="fill stroke markers" d=" M 1813.5 987.5 L 1813.5 989.5" stroke-opacity="1" stroke-miterlimit="10"/><path fill="none" stroke="rgb(255,255,255)" paint-order="fill stroke markers" d=" M 1899.5 987.5 L 1899.5 989.5" stroke-opacity="1" stroke-miterlimit="10"/><path fill="none" stroke="rgb(255,255,255)" paint-order="fill stroke markers" d=" M 1985.5 987.5 L 1985.5 989.5" stroke-opacity="1" stroke-miterlimit="10"/><text fill="rgb(255,255,255)" stroke="none" font-family="geogebra-sans-serif, sans-serif" font-size="16px" font-style="normal" font-weight="normal" text-decoration="normal" x="55" y="17" text-anchor="start" dominant-baseline="alphabetic" fill-opacity="1">τ</text><path fill="none" stroke="rgb(255,255,255)" paint-order="fill stroke markers" d=" M 50.5 944.5 L 48.5 944.5" stroke-opacity="1" stroke-miterlimit="10"/><path fill="none" stroke="rgb(255,255,255)" paint-order="fill stroke markers" d=" M 47.5 901.5 L 50.5 901.5" stroke-opacity="1" stroke-miterlimit="10"/><path fill="none" stroke="rgb(255,255,255)" paint-order="fill stroke markers" d=" M 50.5 858.5 L 48.5 858.5" stroke-opacity="1" stroke-miterlimit="10"/><path fill="none" stroke="rgb(255,255,255)" paint-order="fill stroke markers" d=" M 47.5 815.5 L 50.5 815.5" stroke-opacity="1" stroke-miterlimit="10"/><path fill="none" stroke="rgb(255,255,255)" paint-order="fill stroke markers" d=" M 50.5 772.5 L 48.5 772.5" stroke-opacity="1" stroke-miterlimit="10"/><path fill="none" stroke="rgb(255,255,255)" paint-order="fill stroke markers" d=" M 47.5 729.5 L 50.5 729.5" stroke-opacity="1" stroke-miterlimit="10"/><path fill="none" stroke="rgb(255,255,255)" paint-order="fill stroke markers" d=" M 50.5 686.5 L 48.5 686.5" stroke-opacity="1" stroke-miterlimit="10"/><path fill="none" stroke="rgb(255,255,255)" paint-order="fill stroke markers" d=" M 47.5 643.5 L 50.5 643.5" stroke-opacity="1" stroke-miterlimit="10"/><path fill="none" stroke="rgb(255,255,255)" paint-order="fill stroke markers" d=" M 50.5 600.5 L 48.5 600.5" stroke-opacity="1" stroke-miterlimit="10"/><path fill="none" stroke="rgb(255,255,255)" paint-order="fill stroke markers" d=" M 47.5 557.5 L 50.5 557.5" stroke-opacity="1" stroke-miterlimit="10"/><path fill="none" stroke="rgb(255,255,255)" paint-order="fill stroke markers" d=" M 50.5 514.5 L 48.5 514.5" stroke-opacity="1" stroke-miterlimit="10"/><path fill="none" stroke="rgb(255,255,255)" paint-order="fill stroke markers" d=" M 47.5 471.5 L 50.5 471.5" stroke-opacity="1" stroke-miterlimit="10"/><path fill="none" stroke="rgb(255,255,255)" paint-order="fill stroke markers" d=" M 50.5 428.5 L 48.5 428.5" stroke-opacity="1" stroke-miterlimit="10"/><path fill="none" stroke="rgb(255,255,255)" paint-order="fill stroke markers" d=" M 47.5 385.5 L 50.5 385.5" stroke-opacity="1" stroke-miterlimit="10"/><path fill="none" stroke="rgb(255,255,255)" paint-order="fill stroke markers" d=" M 50.5 342.5 L 48.5 342.5" stroke-opacity="1" stroke-miterlimit="10"/><path fill="none" stroke="rgb(255,255,255)" paint-order="fill stroke markers" d=" M 47.5 299.5 L 50.5 299.5" stroke-opacity="1" stroke-miterlimit="10"/><path fill="none" stroke="rgb(255,255,255)" paint-order="fill stroke markers" d=" M 50.5 256.5 L 48.5 256.5" stroke-opacity="1" stroke-miterlimit="10"/><path fill="none" stroke="rgb(255,255,255)" paint-order="fill stroke markers" d=" M 47.5 213.5 L 50.5 213.5" stroke-opacity="1" stroke-miterlimit="10"/><path fill="none" stroke="rgb(255,255,255)" paint-order="fill stroke markers" d=" M 50.5 170.5 L 48.5 170.5" stroke-opacity="1" stroke-miterlimit="10"/><path fill="none" stroke="rgb(255,255,255)" paint-order="fill stroke markers" d=" M 47.5 127.5 L 50.5 127.5" stroke-opacity="1" stroke-miterlimit="10"/><path fill="none" stroke="rgb(255,255,255)" paint-order="fill stroke markers" d=" M 50.5 84.5 L 48.5 84.5" stroke-opacity="1" stroke-miterlimit="10"/><path fill="none" stroke="rgb(255,255,255)" paint-order="fill stroke markers" d=" M 47.5 41.5 L 50.5 41.5" stroke-opacity="1" stroke-miterlimit="10"/><path fill="none" stroke="rgb(255,255,255)" paint-order="fill stroke markers" d=" M 50.5 -1.5 L 48.5 -1.5" stroke-opacity="1" stroke-miterlimit="10"/><text fill="rgb(255,255,255)" stroke="none" font-family="geogebra-sans-serif, sans-serif" font-size="12px" font-style="normal" font-weight="normal" text-decoration="normal" x="15" y="906" text-anchor="start" dominant-baseline="alphabetic" fill-opacity="1">50μs</text><text fill="none" stroke="rgb(33,33,33)" font-family="geogebra-sans-serif, sans-serif" font-size="12px" font-style="normal" font-weight="normal" text-decoration="normal" x="15" y="906" text-anchor="start" dominant-baseline="alphabetic" stroke-opacity="1" stroke-linejoin="bevel" stroke-miterlimit="10" stroke-width="3">50μs</text><text fill="rgb(255,255,255)" stroke="none" font-family="geogebra-sans-serif, sans-serif" font-size="12px" font-style="normal" font-weight="normal" text-decoration="normal" x="15" y="906" text-anchor="start" dominant-baseline="alphabetic" fill-opacity="1">50μs</text><text fill="rgb(255,255,255)" stroke="none" font-family="geogebra-sans-serif, sans-serif" font-size="12px" font-style="normal" font-weight="normal" text-decoration="normal" x="8" y="820" text-anchor="start" dominant-baseline="alphabetic" fill-opacity="1">100μs</text><text fill="none" stroke="rgb(33,33,33)" font-family="geogebra-sans-serif, sans-serif" font-size="12px" font-style="normal" font-weight="normal" text-decoration="normal" x="8" y="820" text-anchor="start" dominant-baseline="alphabetic" stroke-opacity="1" stroke-linejoin="bevel" stroke-miterlimit="10" stroke-width="3">100μs</text><text fill="rgb(255,255,255)" stroke="none" font-family="geogebra-sans-serif, sans-serif" font-size="12px" font-style="normal" font-weight="normal" text-decoration="normal" x="8" y="820" text-anchor="start" dominant-baseline="alphabetic" fill-opacity="1">100μs</text><text fill="rgb(255,255,255)" stroke="none" font-family="geogebra-sans-serif, sans-serif" font-size="12px" font-style="normal" font-weight="normal" text-decoration="normal" x="8" y="734" text-anchor="start" dominant-baseline="alphabetic" fill-opacity="1">150μs</text><text fill="none" stroke="rgb(33,33,33)" font-family="geogebra-sans-serif, sans-serif" font-size="12px" font-style="normal" font-weight="normal" text-decoration="normal" x="8" y="734" text-anchor="start" dominant-baseline="alphabetic" stroke-opacity="1" stroke-linejoin="bevel" stroke-miterlimit="10" stroke-width="3">150μs</text><text fill="rgb(255,255,255)" stroke="none" font-family="geogebra-sans-serif, sans-serif" font-size="12px" font-style="normal" font-weight="normal" text-decoration="normal" x="8" y="734" text-anchor="start" dominant-baseline="alphabetic" fill-opacity="1">150μs</text><text fill="rgb(255,255,255)" stroke="none" font-family="geogebra-sans-serif, sans-serif" font-size="12px" font-style="normal" font-weight="normal" text-decoration="normal" x="8" y="648" text-anchor="start" dominant-baseline="alphabetic" fill-opacity="1">200μs</text><text fill="none" stroke="rgb(33,33,33)" font-family="geogebra-sans-serif, sans-serif" font-size="12px" font-style="normal" font-weight="normal" text-decoration="normal" x="8" y="648" text-anchor="start" dominant-baseline="alphabetic" stroke-opacity="1" stroke-linejoin="bevel" stroke-miterlimit="10" stroke-width="3">200μs</text><text fill="rgb(255,255,255)" stroke="none" font-family="geogebra-sans-serif, sans-serif" font-size="12px" font-style="normal" font-weight="normal" text-decoration="normal" x="8" y="648" text-anchor="start" dominant-baseline="alphabetic" fill-opacity="1">200μs</text><text fill="rgb(255,255,255)" stroke="none" font-family="geogebra-sans-serif, sans-serif" font-size="12px" font-style="normal" font-weight="normal" text-decoration="normal" x="8" y="562" text-anchor="start" dominant-baseline="alphabetic" fill-opacity="1">250μs</text><text fill="none" stroke="rgb(33,33,33)" font-family="geogebra-sans-serif, sans-serif" font-size="12px" font-style="normal" font-weight="normal" text-decoration="normal" x="8" y="562" text-anchor="start" dominant-baseline="alphabetic" stroke-opacity="1" stroke-linejoin="bevel" stroke-miterlimit="10" stroke-width="3">250μs</text><text fill="rgb(255,255,255)" stroke="none" font-family="geogebra-sans-serif, sans-serif" font-size="12px" font-style="normal" font-weight="normal" text-decoration="normal" x="8" y="562" text-anchor="start" dominant-baseline="alphabetic" fill-opacity="1">250μs</text><text fill="rgb(255,255,255)" stroke="none" font-family="geogebra-sans-serif, sans-serif" font-size="12px" font-style="normal" font-weight="normal" text-decoration="normal" x="8" y="476" text-anchor="start" dominant-baseline="alphabetic" fill-opacity="1">300μs</text><text fill="none" stroke="rgb(33,33,33)" font-family="geogebra-sans-serif, sans-serif" font-size="12px" font-style="normal" font-weight="normal" text-decoration="normal" x="8" y="476" text-anchor="start" dominant-baseline="alphabetic" stroke-opacity="1" stroke-linejoin="bevel" stroke-miterlimit="10" stroke-width="3">300μs</text><text fill="rgb(255,255,255)" stroke="none" font-family="geogebra-sans-serif, sans-serif" font-size="12px" font-style="normal" font-weight="normal" text-decoration="normal" x="8" y="476" text-anchor="start" dominant-baseline="alphabetic" fill-opacity="1">300μs</text><text fill="rgb(255,255,255)" stroke="none" font-family="geogebra-sans-serif, sans-serif" font-size="12px" font-style="normal" font-weight="normal" text-decoration="normal" x="8" y="390" text-anchor="start" dominant-baseline="alphabetic" fill-opacity="1">350μs</text><text fill="none" stroke="rgb(33,33,33)" font-family="geogebra-sans-serif, sans-serif" font-size="12px" font-style="normal" font-weight="normal" text-decoration="normal" x="8" y="390" text-anchor="start" dominant-baseline="alphabetic" stroke-opacity="1" stroke-linejoin="bevel" stroke-miterlimit="10" stroke-width="3">350μs</text><text fill="rgb(255,255,255)" stroke="none" font-family="geogebra-sans-serif, sans-serif" font-size="12px" font-style="normal" font-weight="normal" text-decoration="normal" x="8" y="390" text-anchor="start" dominant-baseline="alphabetic" fill-opacity="1">350μs</text><text fill="rgb(255,255,255)" stroke="none" font-family="geogebra-sans-serif, sans-serif" font-size="12px" font-style="normal" font-weight="normal" text-decoration="normal" x="8" y="304" text-anchor="start" dominant-baseline="alphabetic" fill-opacity="1">400μs</text><text fill="none" stroke="rgb(33,33,33)" font-family="geogebra-sans-serif, sans-serif" font-size="12px" font-style="normal" font-weight="normal" text-decoration="normal" x="8" y="304" text-anchor="start" dominant-baseline="alphabetic" stroke-opacity="1" stroke-linejoin="bevel" stroke-miterlimit="10" stroke-width="3">400μs</text><text fill="rgb(255,255,255)" stroke="none" font-family="geogebra-sans-serif, sans-serif" font-size="12px" font-style="normal" font-weight="normal" text-decoration="normal" x="8" y="304" text-anchor="start" dominant-baseline="alphabetic" fill-opacity="1">400μs</text><text fill="rgb(255,255,255)" stroke="none" font-family="geogebra-sans-serif, sans-serif" font-size="12px" font-style="normal" font-weight="normal" text-decoration="normal" x="8" y="218" text-anchor="start" dominant-baseline="alphabetic" fill-opacity="1">450μs</text><text fill="none" stroke="rgb(33,33,33)" font-family="geogebra-sans-serif, sans-serif" font-size="12px" font-style="normal" font-weight="normal" text-decoration="normal" x="8" y="218" text-anchor="start" dominant-baseline="alphabetic" stroke-opacity="1" stroke-linejoin="bevel" stroke-miterlimit="10" stroke-width="3">450μs</text><text fill="rgb(255,255,255)" stroke="none" font-family="geogebra-sans-serif, sans-serif" font-size="12px" font-style="normal" font-weight="normal" text-decoration="normal" x="8" y="218" text-anchor="start" dominant-baseline="alphabetic" fill-opacity="1">450μs</text><text fill="rgb(255,255,255)" stroke="none" font-family="geogebra-sans-serif, sans-serif" font-size="12px" font-style="normal" font-weight="normal" text-decoration="normal" x="8" y="132" text-anchor="start" dominant-baseline="alphabetic" fill-opacity="1">500μs</text><text fill="none" stroke="rgb(33,33,33)" font-family="geogebra-sans-serif, sans-serif" font-size="12px" font-style="normal" font-weight="normal" text-decoration="normal" x="8" y="132" text-anchor="start" dominant-baseline="alphabetic" stroke-opacity="1" stroke-linejoin="bevel" stroke-miterlimit="10" stroke-width="3">500μs</text><text fill="rgb(255,255,255)" stroke="none" font-family="geogebra-sans-serif, sans-serif" font-size="12px" font-style="normal" font-weight="normal" text-decoration="normal" x="8" y="132" text-anchor="start" dominant-baseline="alphabetic" fill-opacity="1">500μs</text><text fill="rgb(255,255,255)" stroke="none" font-family="geogebra-sans-serif, sans-serif" font-size="12px" font-style="normal" font-weight="normal" text-decoration="normal" x="8" y="46" text-anchor="start" dominant-baseline="alphabetic" fill-opacity="1">550μs</text><text fill="none" stroke="rgb(33,33,33)" font-family="geogebra-sans-serif, sans-serif" font-size="12px" 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diff --git a/package-lock.json b/package-lock.json
index 7152716..80e872e 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
     "name": "n-digit-token",
-    "version": "2.2.1",
+    "version": "2.2.2",
     "lockfileVersion": 2,
     "requires": true,
     "packages": {
         "": {
             "name": "n-digit-token",
-            "version": "2.2.1",
+            "version": "2.2.2",
             "license": "MIT",
             "devDependencies": {
                 "@types/jest": "^29.5.4",
@@ -37,12 +37,12 @@
             }
         },
         "node_modules/@babel/code-frame": {
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+                "@babel/helper-function-name": "^7.23.0",
                 "@babel/helper-hoist-variables": "^7.22.5",
                 "@babel/helper-split-export-declaration": "^7.22.6",
-                "@babel/parser": "^7.22.16",
-                "@babel/types": "^7.22.17",
-                "debug": "^4.1.0",
+                "@babel/parser": "^7.23.6",
+                "@babel/types": "^7.23.6",
+                "debug": "^4.3.1",
                 "globals": "^11.1.0"
             }
         },
         "@babel/types": {
-            "version": "7.22.17",
-            "resolved": "https://registry.npmjs.org/@babel/types/-/types-7.22.17.tgz",
-            "integrity": "sha512-YSQPHLFtQNE5xN9tHuZnzu8vPr61wVTBZdfv1meex1NBosa4iT05k/Jw06ddJugi4bk7The/oSwQGFcksmEJQg==",
+            "version": "7.23.6",
+            "resolved": "https://registry.npmjs.org/@babel/types/-/types-7.23.6.tgz",
+            "integrity": "sha512-+uarb83brBzPKN38NX1MkB6vb6+mwvR6amUulqAE7ccQw1pEl+bCia9TbdG1lsnFP7lZySvUn37CHyXQdfTwzg==",
             "dev": true,
             "requires": {
-                "@babel/helper-string-parser": "^7.22.5",
-                "@babel/helper-validator-identifier": "^7.22.15",
+                "@babel/helper-string-parser": "^7.23.4",
+                "@babel/helper-validator-identifier": "^7.22.20",
                 "to-fast-properties": "^2.0.0"
             }
         },
@@ -7062,9 +7065,9 @@
             "dev": true
         },
         "bn.js": {
-            "version": "5.2.0",
-            "resolved": "https://registry.npmjs.org/bn.js/-/bn.js-5.2.0.tgz",
-            "integrity": "sha512-D7iWRBvnZE8ecXiLj/9wbxH7Tk79fAh8IHaTNq1RWRixsS02W+5qS+iE9yq6RYl0asXx5tw0bLhmT5pIfbSquw==",
+            "version": "5.2.1",
+            "resolved": "https://registry.npmjs.org/bn.js/-/bn.js-5.2.1.tgz",
+            "integrity": "sha512-eXRvHzWyYPBuB4NBy0cmYQjGitUrtqwbvlzP3G6VFnNRbsZQIxQ10PbKKHt8gZ/HW/D/747aDl+QkDqg3KQLMQ==",
             "dev": true
         },
         "brace-expansion": {
@@ -7140,20 +7143,20 @@
             }
         },
         "browserify-sign": {
-            "version": "4.2.1",
-            "resolved": "https://registry.npmjs.org/browserify-sign/-/browserify-sign-4.2.1.tgz",
-            "integrity": "sha512-/vrA5fguVAKKAVTNJjgSm1tRQDHUU6DbwO9IROu/0WAzC8PKhucDSh18J0RMvVeHAn5puMd+QHC2erPRNf8lmg==",
+            "version": "4.2.2",
+            "resolved": "https://registry.npmjs.org/browserify-sign/-/browserify-sign-4.2.2.tgz",
+            "integrity": "sha512-1rudGyeYY42Dk6texmv7c4VcQ0EsvVbLwZkA+AQB7SxvXxmcD93jcHie8bzecJ+ChDlmAm2Qyu0+Ccg5uhZXCg==",
             "dev": true,
             "requires": {
-                "bn.js": "^5.1.1",
-                "browserify-rsa": "^4.0.1",
+                "bn.js": "^5.2.1",
+                "browserify-rsa": "^4.1.0",
                 "create-hash": "^1.2.0",
                 "create-hmac": "^1.1.7",
-                "elliptic": "^6.5.3",
+                "elliptic": "^6.5.4",
                 "inherits": "^2.0.4",
-                "parse-asn1": "^5.1.5",
-                "readable-stream": "^3.6.0",
-                "safe-buffer": "^5.2.0"
+                "parse-asn1": "^5.1.6",
+                "readable-stream": "^3.6.2",
+                "safe-buffer": "^5.2.1"
             },
             "dependencies": {
                 "safe-buffer": {
@@ -9648,9 +9651,9 @@
             "dev": true
         },
         "readable-stream": {
-            "version": "3.6.0",
-            "resolved": "https://registry.npmjs.org/readable-stream/-/readable-stream-3.6.0.tgz",
-            "integrity": "sha512-BViHy7LKeTz4oNnkcLJ+lVSL6vpiFeX6/d3oSH8zCW7UxP2onchk+vTGB143xuFjHS3deTgkKoXXymXqymiIdA==",
+            "version": "3.6.2",
+            "resolved": "https://registry.npmjs.org/readable-stream/-/readable-stream-3.6.2.tgz",
+            "integrity": "sha512-9u/sniCrY3D5WdsERHzHE4G2YCXqoG5FTHUiCC4SIbr6XcLZBY05ya9EKjYek9O5xOAwjGq+1JdGBAS7Q9ScoA==",
             "dev": true,
             "requires": {
                 "inherits": "^2.0.3",
diff --git a/package.json b/package.json
index ceabe40..a074a74 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
     "name": "n-digit-token",
-    "version": "2.2.1",
+    "version": "2.2.2",
     "description": "Cryptographically secure pseudo-random token of n digits",
     "keywords": [
         "token",
diff --git a/src/library/calculateByteSize.ts b/src/library/calculateByteSize.ts
index 7bc1955..09b7f86 100644
--- a/src/library/calculateByteSize.ts
+++ b/src/library/calculateByteSize.ts
@@ -8,4 +8,4 @@ import type { Options } from './types';
  * @return {number} required number of bytes
  */
 export const calculateByteSize = (length: number, options?: Options): number =>
-  options?.customMemory || DEFAULT_BYTE_SIZE + length;
+  options && options.customMemory || DEFAULT_BYTE_SIZE + length;
diff --git a/src/library/generateSecureBytes.ts b/src/library/generateSecureBytes.ts
index 95c7565..0bd3307 100644
--- a/src/library/generateSecureBytes.ts
+++ b/src/library/generateSecureBytes.ts
@@ -7,7 +7,7 @@ import type { Options } from './types';
  * @return {Buffer} bytes in buffer
  */
 const generateSecureBytesBuffer = (length: number, options?: Options): Buffer =>
-  options?.customByteStream
+  options && options.customByteStream
     ? options.customByteStream(length)
     : randomBytes(length);