diff --git a/package.json b/package.json
index ba488a712e4b..f78edae2cdcc 100644
--- a/package.json
+++ b/package.json
@@ -134,6 +134,7 @@
     "jasmine": "^2.4.1",
     "jasmine-spec-reporter": "^3.2.0",
     "minimist": "^1.2.0",
+    "mime": "1.3.4",
     "mocha": "^3.2.0",
     "mock-fs": "^4.0.0",
     "npm-run": "^4.1.0",