diff --git a/examples/pdf-server/package.json b/examples/pdf-server/package.json
index 9a2368390..75f5902d4 100644
--- a/examples/pdf-server/package.json
+++ b/examples/pdf-server/package.json
@@ -28,7 +28,7 @@
     "build:mcpb": "npm run build && node build-mcpb.mjs"
   },
   "dependencies": {
-    "@cantoo/pdf-lib": "^2.6.5",
+    "@cantoo/pdf-lib": "2.6.5",
     "@modelcontextprotocol/client": "2.0.0",
     "@modelcontextprotocol/express": "2.0.0",
     "@modelcontextprotocol/ext-apps": "^2.0.0",
diff --git a/package-lock.json b/package-lock.json
index 10464e3be..238d784a1 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -758,7 +758,7 @@
       "version": "2.0.2",
       "license": "MIT",
       "dependencies": {
-        "@cantoo/pdf-lib": "^2.6.5",
+        "@cantoo/pdf-lib": "2.6.5",
         "@modelcontextprotocol/client": "2.0.0",
         "@modelcontextprotocol/express": "2.0.0",
         "@modelcontextprotocol/ext-apps": "^2.0.0",