diff --git a/package.json b/package.json
index 6971e71..33505f2 100644
--- a/package.json
+++ b/package.json
@@ -19,7 +19,7 @@
     "impro": "~0.13.1",
     "inkscape": "^3.0.0",
     "jpegtran": "^2.0.0",
-    "mime": "^3.0.0",
+    "mime": "^4.0.0",
     "optimist": "^0.6.1",
     "optipng": "^4.0.0",
     "passerror": "^1.1.1",