diff --git a/elm.json b/elm.json
index 23be47b..e4a4b96 100644
--- a/elm.json
+++ b/elm.json
@@ -14,7 +14,7 @@
         "elm/html": "1.0.0 <= v < 2.0.0",
         "elm/json": "1.0.0 <= v < 2.0.0",
         "elm/time": "1.0.0 <= v < 2.0.0",
-        "rtfeldman/elm-css": "15.1.0 <= v < 18.0.0"
+        "rtfeldman/elm-css": "15.1.0 <= v < 19.0.0"
     },
     "test-dependencies": {}
 }