diff --git a/extensions/mattermost/package.json b/extensions/mattermost/package.json
index 6b100cf27..bf97b8983 100644
--- a/extensions/mattermost/package.json
+++ b/extensions/mattermost/package.json
@@ -21,5 +21,9 @@
       "localPath": "extensions/mattermost",
       "defaultChoice": "npm"
     }
+  },
+  "dependencies": {
+    "ws": "^8.19.0",
+    "zod": "^4.3.6"
   }
 }
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 95b940c97..2e01257f6 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -352,7 +352,14 @@ importers:
         specifier: workspace:*
         version: link:../..
 
-  extensions/mattermost: {}
+  extensions/mattermost:
+    dependencies:
+      ws:
+        specifier: ^8.19.0
+        version: 8.19.0
+      zod:
+        specifier: ^4.3.6
+        version: 4.3.6
 
   extensions/memory-core:
     devDependencies: