diff --git a/functions/package.json b/functions/package.json
index 25a35b2..7585455 100644
--- a/functions/package.json
+++ b/functions/package.json
@@ -6,7 +6,7 @@
     "@google-cloud/storage": "^0.7.0",
     "firebase-functions": "^0.5",
     "mkdirp-promise": "^5.0.1",
-    "sharp": "^0.17.2"
+    "sharp": "^0.30.5"
   },
   "private": true
 }