diff --git a/app/polymer/package.json b/app/polymer/package.json
index 1325f832032..0d85a83cad4 100644
--- a/app/polymer/package.json
+++ b/app/polymer/package.json
@@ -61,7 +61,7 @@
     "json5": "^0.5.1",
     "lodash.pick": "^4.4.0",
     "polymer-webpack-loader": "2.0.1",
-    "postcss-flexbugs-fixes": "^3.2.0",
+    "postcss-flexbugs-fixes": "^3.3.0",
     "postcss-loader": "^2.0.8",
     "prop-types": "^15.6.0",
     "qs": "^6.5.1",