diff --git a/programs/sway/default.nix b/programs/sway/default.nix
index 917cd56..53a97c0 100644
--- a/programs/sway/default.nix
+++ b/programs/sway/default.nix
@@ -109,7 +109,7 @@
             {app_id = "\.blueman-manager-wrapped";}
             {app_id = "nm-connection-editor";}
             {class = "steam";}
-            {class = "matplotlib";}
+            {class = "[Mm]atplotlib";}
             {class = ".*\.py";}
             {class = "Idl";}
           ];