diff --git a/tools/package-lock.json b/tools/package-lock.json
index 19d9ccc..7b7b240 100644
--- a/tools/package-lock.json
+++ b/tools/package-lock.json
@@ -6,7 +6,7 @@
     "": {
       "name": "cdevents-tools",
       "dependencies": {
-        "ajv": "^8.17",
+        "ajv": "^8.18",
         "ajv-formats": "^3.0",
         "glob": "^13.0"
       }
@@ -33,9 +33,9 @@
       }
     },
     "node_modules/ajv": {
-      "version": "8.17.1",
-      "resolved": "https://registry.npmjs.org/ajv/-/ajv-8.17.1.tgz",
-      "integrity": "sha512-B/gBuNg5SiMTrPkC+A2+cW0RszwxYmn6VYxB/inlBStS5nx6xHIt/ehKRhIMhqusl7a8LjQoZnjCs5vhwxOQ1g==",
+      "version": "8.18.0",
+      "resolved": "https://registry.npmjs.org/ajv/-/ajv-8.18.0.tgz",
+      "integrity": "sha512-PlXPeEWMXMZ7sPYOHqmDyCJzcfNrUr3fGNKtezX14ykXOEIvyK81d+qydx89KY5O71FKMPaQ2vBfBFI5NHR63A==",
       "license": "MIT",
       "dependencies": {
         "fast-deep-equal": "^3.1.3",
diff --git a/tools/package.json b/tools/package.json
index 3904ae9..640ad58 100644
--- a/tools/package.json
+++ b/tools/package.json
@@ -4,7 +4,7 @@
     "validate": "node validate.js"
   },
   "dependencies": {
-    "ajv": "^8.17",
+    "ajv": "^8.18",
     "ajv-formats": "^3.0",
     "glob": "^13.0"
   }