diff --git a/package-lock.json b/package-lock.json
index 9c202112..1f8dbcb0 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -19,7 +19,7 @@
         "@types/chai": "^5.0.0",
         "@types/eslint": "^9.6.1",
         "@types/eslint-config-prettier": "^6.11.3",
-        "@types/mocha": "^10.0.8",
+        "@types/mocha": "^10.0.9",
         "@types/node": "^22.7.5",
         "c8": "^10.1.2",
         "chai": "^5.1.1",
@@ -1099,9 +1099,9 @@
       "dev": true
     },
     "node_modules/@types/mocha": {
-      "version": "10.0.8",
-      "resolved": "https://registry.npmjs.org/@types/mocha/-/mocha-10.0.8.tgz",
-      "integrity": "sha512-HfMcUmy9hTMJh66VNcmeC9iVErIZJli2bszuXc6julh5YGuRb/W5OnkHjwLNYdFlMis0sY3If5SEAp+PktdJjw==",
+      "version": "10.0.9",
+      "resolved": "https://registry.npmjs.org/@types/mocha/-/mocha-10.0.9.tgz",
+      "integrity": "sha512-sicdRoWtYevwxjOHNMPTl3vSfJM6oyW8o1wXeI7uww6b6xHg8eBznQDNSGBCDJmsE8UMxP05JgZRtsKbTqt//Q==",
       "dev": true
     },
     "node_modules/@types/node": {
@@ -4561,7 +4561,7 @@
       },
       "devDependencies": {
         "@types/express": "^5.0.0",
-        "@types/mocha": "^10.0.8"
+        "@types/mocha": "^10.0.9"
       }
     },
     "packages/prio3": {
diff --git a/package.json b/package.json
index 219d5f30..c94ec9b9 100644
--- a/package.json
+++ b/package.json
@@ -28,7 +28,7 @@
     "@types/chai": "^5.0.0",
     "@types/eslint": "^9.6.1",
     "@types/eslint-config-prettier": "^6.11.3",
-    "@types/mocha": "^10.0.8",
+    "@types/mocha": "^10.0.9",
     "@types/node": "^22.7.5",
     "c8": "^10.1.2",
     "chai": "^5.1.1",
diff --git a/packages/interop-test-client/package.json b/packages/interop-test-client/package.json
index 54c95dc1..8530d18b 100644
--- a/packages/interop-test-client/package.json
+++ b/packages/interop-test-client/package.json
@@ -18,6 +18,6 @@
   },
   "devDependencies": {
     "@types/express": "^5.0.0",
-    "@types/mocha": "^10.0.8"
+    "@types/mocha": "^10.0.9"
   }
 }