diff --git a/package.json b/package.json
index c751fd1..cd0029c 100644
--- a/package.json
+++ b/package.json
@@ -20,7 +20,7 @@
     "canvas": "1.6.5"
   },
   "devDependencies": {
-    "assetgraph": "5.1.0",
+    "assetgraph": "5.1.1",
     "coveralls": "^3.0.0",
     "eslint": "5.3.0",
     "eslint-config-onelint": "4.0.0",