diff --git a/styleguide-app/elm-package.json b/styleguide-app/elm-package.json
index 1f1dcb5d..fe4f3010 100644
--- a/styleguide-app/elm-package.json
+++ b/styleguide-app/elm-package.json
@@ -17,7 +17,6 @@
         "elm-lang/navigation": "2.1.0 <= v < 3.0.0",
         "evancz/url-parser": "2.0.1 <= v < 3.0.0",
         "pablohirafuji/elm-markdown": "2.0.4 <= v < 3.0.0",
-        "rtfeldman/elm-css": "11.2.0 <= v < 12.0.0",
         "rtfeldman/elm-css": "13.1.1 <= v < 14.0.0",
         "rtfeldman/elm-css-helpers": "2.1.0 <= v < 3.0.0",
         "rtfeldman/elm-css-util": "1.0.2 <= v < 2.0.0",