diff --git a/package-lock.json b/package-lock.json
index 4a3995c..7ff2ddc 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -74,9 +74,9 @@
       "dev": true
     },
     "@types/chai": {
-      "version": "4.2.18",
-      "resolved": "https://registry.npmjs.org/@types/chai/-/chai-4.2.18.tgz",
-      "integrity": "sha512-rS27+EkB/RE1Iz3u0XtVL5q36MGDWbgYe7zWiodyKNUnthxY0rukK5V36eiUCtCisB7NN8zKYH6DO2M37qxFEQ==",
+      "version": "4.3.1",
+      "resolved": "https://registry.npmjs.org/@types/chai/-/chai-4.3.1.tgz",
+      "integrity": "sha512-/zPMqDkzSZ8t3VtxOa4KPq7uzzW978M9Tvh+j7GHKuo6k6GTLxPJ4J5gE5cjfJ26pnXst0N5Hax8Sr0T2Mi9zQ==",
       "dev": true
     },
     "@types/istanbul-lib-coverage": {
@@ -349,15 +349,16 @@
       "dev": true
     },
     "chai": {
-      "version": "4.3.4",
-      "resolved": "https://registry.npmjs.org/chai/-/chai-4.3.4.tgz",
-      "integrity": "sha512-yS5H68VYOCtN1cjfwumDSuzn/9c+yza4f3reKXlE5rUg7SFcCEy90gJvydNgOYtblyf4Zi6jIWRnXOgErta0KA==",
+      "version": "4.3.6",
+      "resolved": "https://registry.npmjs.org/chai/-/chai-4.3.6.tgz",
+      "integrity": "sha512-bbcp3YfHCUzMOvKqsztczerVgBKSsEijCySNlHHbX3VG1nskvqjz5Rfso1gGwD6w6oOV3eI60pKuMOV5MV7p3Q==",
       "dev": true,
       "requires": {
         "assertion-error": "^1.1.0",
         "check-error": "^1.0.2",
         "deep-eql": "^3.0.1",
         "get-func-name": "^2.0.0",
+        "loupe": "^2.3.1",
         "pathval": "^1.1.1",
         "type-detect": "^4.0.5"
       }
@@ -1536,6 +1537,15 @@
         "js-tokens": "^3.0.0 || ^4.0.0"
       }
     },
+    "loupe": {
+      "version": "2.3.4",
+      "resolved": "https://registry.npmjs.org/loupe/-/loupe-2.3.4.tgz",
+      "integrity": "sha512-OvKfgCC2Ndby6aSTREl5aCCPTNIzlDfQZvZxNUrBrihDhL3xcrYegTblhmEiCrg2kKQz4XsFIaemE5BF4ybSaQ==",
+      "dev": true,
+      "requires": {
+        "get-func-name": "^2.0.0"
+      }
+    },
     "lru-cache": {
       "version": "6.0.0",
       "resolved": "https://registry.npmjs.org/lru-cache/-/lru-cache-6.0.0.tgz",
diff --git a/package.json b/package.json
index 2eef853..21616cb 100644
--- a/package.json
+++ b/package.json
@@ -20,10 +20,10 @@
   },
   "homepage": "https://github.com/webmuds/text#readme",
   "devDependencies": {
-    "@types/chai": "4.2.18",
+    "@types/chai": "4.3.1",
     "@types/mocha": "8.2.2",
     "c8": "7.7.2",
-    "chai": "4.3.4",
+    "chai": "4.3.6",
     "mocha": "8.4.0",
     "standard": "16.0.3"
   },