diff --git a/functions/slack/package.json b/functions/slack/package.json
index cf92ff8555..17b4e841d6 100644
--- a/functions/slack/package.json
+++ b/functions/slack/package.json
@@ -17,7 +17,7 @@
     "test": "ava -T 20s --verbose test/*.test.js"
   },
   "dependencies": {
-    "googleapis": "20.1.0"
+    "googleapis": "25.0.0"
   },
   "devDependencies": {
     "@google-cloud/nodejs-repo-tools": "1.4.17",