diff --git a/hosts/yarn/default.nix b/hosts/yarn/default.nix
index e0a167d..91f34e0 100644
--- a/hosts/yarn/default.nix
+++ b/hosts/yarn/default.nix
@@ -124,7 +124,7 @@
       defaultCompatTool = "proton_10";
       apps."fh5" = {
         id = 1551360;
-        compatTool = "proton_10";
+        compatTool = "proton_experimental";
         launchOptions.env = {
           # OptiScaler FSR 4 INT8 path on this RDNA 3 (Navi 32) box.
           # PROTON_FSR4_UPGRADE opts FH5 into Proton's FSR 4 DLL upgrade;