diff --git a/package-lock.json b/package-lock.json
index db7dd48..12d480f 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -9,7 +9,7 @@
             "version": "0.6.1",
             "license": "Apache-2.0",
             "dependencies": {
-                "o1js": "1.3.1"
+                "o1js": "1.8.0"
             },
             "devDependencies": {
                 "@babel/preset-env": "^7.16.4",
@@ -24,7 +24,7 @@
                 "lint-staged": "^11.0.1",
                 "prettier": "^2.3.2",
                 "ts-jest": "^28.0.8",
-                "typescript": "^5.1"
+                "typescript": "^5.4"
             }
         },
         "node_modules/@aashutoshrathi/word-wrap": {
@@ -3340,11 +3340,12 @@
             }
         },
         "node_modules/braces": {
-            "version": "3.0.2",
+            "version": "3.0.3",
+            "resolved": "https://registry.npmjs.org/braces/-/braces-3.0.3.tgz",
+            "integrity": "sha512-yQbXgO/OSZVD2IsiLlro+7Hf6Q18EJrKSEsdoMzKePKXct3gvD8oLcOQdIzGupr5Fj+EDe8gO/lxc1BzfMpxvA==",
             "dev": true,
-            "license": "MIT",
             "dependencies": {
-                "fill-range": "^7.0.1"
+                "fill-range": "^7.1.1"
             },
             "engines": {
                 "node": ">=8"
@@ -4291,9 +4292,10 @@
             }
         },
         "node_modules/fill-range": {
-            "version": "7.0.1",
+            "version": "7.1.1",
+            "resolved": "https://registry.npmjs.org/fill-range/-/fill-range-7.1.1.tgz",
+            "integrity": "sha512-YsGpe3WHLK8ZYi4tWDg2Jy3ebRz2rXowDxnld4bkQB00cc/1Zw9AWnC0i9ztDJitivtQvaI9KaLyKrc+hBW0yg==",
             "dev": true,
-            "license": "MIT",
             "dependencies": {
                 "to-regex-range": "^5.0.1"
             },
@@ -4339,6 +4341,20 @@
             "dev": true,
             "license": "ISC"
         },
+        "node_modules/fsevents": {
+            "version": "2.3.3",
+            "resolved": "https://registry.npmjs.org/fsevents/-/fsevents-2.3.3.tgz",
+            "integrity": "sha512-5xoDfX+fL7faATnagmWPpbFtwh/R77WmMMqqHGS65C3vvB0YHrgF+B1YmZ3441tMj5n63k0212XNoJwzlhffQw==",
+            "dev": true,
+            "hasInstallScript": true,
+            "optional": true,
+            "os": [
+                "darwin"
+            ],
+            "engines": {
+                "node": "^8.16.0 || ^10.6.0 || >=11.0.0"
+            }
+        },
         "node_modules/function-bind": {
             "version": "1.1.2",
             "dev": true,
@@ -4624,8 +4640,9 @@
         },
         "node_modules/is-number": {
             "version": "7.0.0",
+            "resolved": "https://registry.npmjs.org/is-number/-/is-number-7.0.0.tgz",
+            "integrity": "sha512-41Cifkg6e8TylSpdtTpeLVMqvSBEVzTttHvERD741+pnZ8ANv0004MRL43QKPDlK9cGvNp6NZWZUBlbGXYxxng==",
             "dev": true,
-            "license": "MIT",
             "engines": {
                 "node": ">=0.12.0"
             }
@@ -6878,11 +6895,12 @@
             }
         },
         "node_modules/micromatch": {
-            "version": "4.0.5",
+            "version": "4.0.8",
+            "resolved": "https://registry.npmjs.org/micromatch/-/micromatch-4.0.8.tgz",
+            "integrity": "sha512-PXwfBhYu0hBCPw8Dn0E+WDYb7af3dSLVWKi3HGv84IdF4TyFoC0ysxFd0Goxw7nSv4T/PzEJQxsYsEiFCKo2BA==",
             "dev": true,
-            "license": "MIT",
             "dependencies": {
-                "braces": "^3.0.2",
+                "braces": "^3.0.3",
                 "picomatch": "^2.3.1"
             },
             "engines": {
@@ -6987,8 +7005,9 @@
             }
         },
         "node_modules/o1js": {
-            "version": "1.3.1",
-            "license": "Apache-2.0",
+            "version": "1.8.0",
+            "resolved": "https://registry.npmjs.org/o1js/-/o1js-1.8.0.tgz",
+            "integrity": "sha512-mN0aM4HW3kyl/Gx0irqKQSQ2JftbmsK2t5nSZpTuNgTOVl0wQ6KZumXXps6E5hGkCjRfk+FjlL7CBsmqKqzYzg==",
             "dependencies": {
                 "blakejs": "1.2.1",
                 "cachedir": "^2.4.0",
@@ -7858,8 +7877,9 @@
         },
         "node_modules/to-regex-range": {
             "version": "5.0.1",
+            "resolved": "https://registry.npmjs.org/to-regex-range/-/to-regex-range-5.0.1.tgz",
+            "integrity": "sha512-65P7iz6X5yEr1cwcgvQxbbIw7Uk3gOy5dIdtZ4rDveLqhrdJP+Li/Hx6tyK0NEb+2GCyneCMJiGqrADCSNk8sQ==",
             "dev": true,
-            "license": "MIT",
             "dependencies": {
                 "is-number": "^7.0.0"
             },
diff --git a/package.json b/package.json
index 1ff0eaa..3af9d69 100644
--- a/package.json
+++ b/package.json
@@ -57,9 +57,9 @@
         "lint-staged": "^11.0.1",
         "prettier": "^2.3.2",
         "ts-jest": "^28.0.8",
-        "typescript": "^5.1"
+        "typescript": "^5.4"
     },
     "dependencies": {
-        "o1js": "1.3.1"
+        "o1js": "1.8.0"
     }
 }
diff --git a/src/CustomScalar.ts b/src/CustomScalar.ts
index 93ae33e..cf1cb1d 100644
--- a/src/CustomScalar.ts
+++ b/src/CustomScalar.ts
@@ -1,6 +1,9 @@
 import { Bool, Field, Poseidon, Scalar, Struct, UInt64 } from 'o1js';
 import { fromUInt64ToScalar } from './utils/math.js';
 
+/**
+ * @deprecated This class is deprecated. Use Scalar instead.
+ */
 export class CustomScalar extends Struct({
     scalar: Scalar,
 }) {
diff --git a/src/utils/utils.test.ts b/src/utils/utils.test.ts
index cbda79e..f6f865c 100644
--- a/src/utils/utils.test.ts
+++ b/src/utils/utils.test.ts
@@ -59,7 +59,7 @@ describe('Network', () => {
 
         @method
         async testWithSender(value1: Field, value2: Field) {
-            this.sender.getAndRequireSignature();
+            this.sender.getAndRequireSignatureV2();
             value1.assertEquals(value2);
             this.num.set(value1);
             this.reducer.dispatch(value1);
diff --git a/src/utils/zkApp.ts b/src/utils/zkApp.ts
index 2eb7894..b86a158 100644
--- a/src/utils/zkApp.ts
+++ b/src/utils/zkApp.ts
@@ -64,10 +64,10 @@ function requireCaller(address: PublicKey, contract: SmartContract) {
     return update;
 }
 
-function checkCondition(condition: Bool, message: string) {
+function checkCondition(condition: Bool, message?: string) {
     Provable.witness(Void, () => {
         if (!condition.toBoolean()) {
-            console.error(message);
+            console.error(message || 'Unknown error!');
         }
     });
     return condition;