diff --git a/pkgs/applications/audio/keyfinder/default.nix b/pkgs/applications/audio/keyfinder/default.nix
index 7706203104ca..74110c5924e3 100644
--- a/pkgs/applications/audio/keyfinder/default.nix
+++ b/pkgs/applications/audio/keyfinder/default.nix
@@ -1,11 +1,11 @@
 { stdenv, fetchFromGitHub, libav_0_8, libkeyfinder, qtbase, qtxmlpatterns, taglib }:
 
-let version = "2.00"; in
+let version = "2.1"; in
 stdenv.mkDerivation {
   name = "keyfinder-${version}";
 
   src = fetchFromGitHub {
-    sha256 = "16gyvvws93fyvx5qb2x9qhsg4bn710kgdh6q9sl2dwfsx6npkh9m";
+    sha256 = "0j9k90ll4cr8j8dywb6zf1bs9vijlx7m4zsh6w9hxwrr7ymz89hn";
     rev = version;
     repo = "is_KeyFinder";
     owner = "ibsh";
@@ -29,7 +29,6 @@ stdenv.mkDerivation {
     maintainers = with maintainers; [ nckx ];
   };
 
-  # TODO: upgrade libav when "Audio sample format conversion failed" is fixed
   buildInputs = [ libav_0_8 libkeyfinder qtbase qtxmlpatterns taglib ];
 
   postPatch = ''
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 863798b21ac7..53824be02eb2 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -12269,7 +12269,7 @@ let
 
   kermit = callPackage ../tools/misc/kermit { };
 
-  keyfinder = qt5.callPackage ../applications/audio/keyfinder { };
+  keyfinder = qt55.callPackage ../applications/audio/keyfinder { };
 
   keyfinder-cli = qt5.callPackage ../applications/audio/keyfinder-cli { };