diff --git a/pkgs/applications/audio/zrythm/default.nix b/pkgs/applications/audio/zrythm/default.nix
index 953a97ac67f8..c3b6f37b4de8 100644
--- a/pkgs/applications/audio/zrythm/default.nix
+++ b/pkgs/applications/audio/zrythm/default.nix
@@ -76,24 +76,24 @@ let
   # only available on Carla unstable as of 2023-02-24.
   carla-unstable = carla.overrideAttrs (oldAttrs: rec {
     pname = "carla";
-    version = "unstable-2023-02-24";
+    version = "unstable-2023-05-12";
 
     src = fetchFromGitHub {
       owner = "falkTX";
       repo = pname;
-      rev = "33a142f447925f55d00532933a1f28e9745c13eb";
-      hash = "sha256-hQj0HlcOYfwsxG05pq/qcuKcOwDMV1ED+YdxBToBzvk=";
+      rev = "0175570f1d41285f39efe0ee32234458e0ed941c";
+      hash = "sha256-yfVzZV8G4AUDM8+yS9finzobpOb1PUEPgBWFhEY4nFQ=";
     };
   });
 in stdenv.mkDerivation rec {
   pname = "zrythm";
-  version = "1.0.0-beta.4.6.3";
+  version = "1.0.0-beta.4.9.1";
 
   src = fetchFromSourcehut {
     owner = "~alextee";
     repo = pname;
     rev = "v${version}";
-    hash = "sha256-5GBr8N+GzbptrvP/NisBXT0dsl9vn537B4InB00/N+A=";
+    hash = "sha256-U3IUqNbHu20uyWfkTsLOOlUZjcUL4QdHilB3srSsebw=";
   };
 
   nativeBuildInputs = [