diff --git a/injected/package.json b/injected/package.json
index 0aa2311325..b982ea071e 100644
--- a/injected/package.json
+++ b/injected/package.json
@@ -41,7 +41,7 @@
     "@types/jasmine": "^5.1.9",
     "@types/node": "^24.1.0",
     "@typescript-eslint/eslint-plugin": "^8.42.0",
-    "fast-check": "^4.2.0",
+    "fast-check": "^4.3.0",
     "jasmine": "^5.10.0",
     "web-ext": "^8.9.0"
   }
diff --git a/package-lock.json b/package-lock.json
index 135f37dc0f..2848e73c28 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -52,7 +52,7 @@
         "@types/jasmine": "^5.1.9",
         "@types/node": "^24.1.0",
         "@typescript-eslint/eslint-plugin": "^8.42.0",
-        "fast-check": "^4.2.0",
+        "fast-check": "^4.3.0",
         "jasmine": "^5.10.0",
         "web-ext": "^8.9.0"
       }
@@ -5001,9 +5001,9 @@
       "license": "MIT"
     },
     "node_modules/fast-check": {
-      "version": "4.2.0",
-      "resolved": "https://registry.npmjs.org/fast-check/-/fast-check-4.2.0.tgz",
-      "integrity": "sha512-buxrKEaSseOwFjt6K1REcGMeFOrb0wk3cXifeMAG8yahcE9kV20PjQn1OdzPGL6OBFTbYXfjleNBARf/aCfV1A==",
+      "version": "4.3.0",
+      "resolved": "https://registry.npmjs.org/fast-check/-/fast-check-4.3.0.tgz",
+      "integrity": "sha512-JVw/DJSxVKl8uhCb7GrwanT9VWsCIdBkK3WpP37B/Au4pyaspriSjtrY2ApbSFwTg3ViPfniT13n75PhzE7VEQ==",
       "dev": true,
       "funding": [
         {
@@ -10897,7 +10897,7 @@
       "devDependencies": {
         "@duckduckgo/messaging": "*",
         "chokidar": "^4.0.3",
-        "fast-check": "^4.2.0",
+        "fast-check": "^4.3.0",
         "http-server": "^14.1.1",
         "web-resource-inliner": "^6.0.1"
       }
diff --git a/special-pages/package.json b/special-pages/package.json
index e7860339f0..a78d708dc8 100644
--- a/special-pages/package.json
+++ b/special-pages/package.json
@@ -30,7 +30,7 @@
   "devDependencies": {
     "@duckduckgo/messaging": "*",
     "chokidar": "^4.0.3",
-    "fast-check": "^4.2.0",
+    "fast-check": "^4.3.0",
     "http-server": "^14.1.1",
     "web-resource-inliner": "^6.0.1"
   },