diff --git a/modules/rice/rio.nix b/modules/rice/rio.nix
index ed1bc77..cb71403 100644
--- a/modules/rice/rio.nix
+++ b/modules/rice/rio.nix
@@ -33,7 +33,7 @@
       };
 
       window = {
-        background-opacity = "0.8";
+        background-opacity = 0.8;
       };
     };
   };