diff --git a/pkgs/applications/networking/sync/unison/default.nix b/pkgs/applications/networking/sync/unison/default.nix
index 429042f3ee4b..9759516eddc2 100644
--- a/pkgs/applications/networking/sync/unison/default.nix
+++ b/pkgs/applications/networking/sync/unison/default.nix
@@ -14,13 +14,13 @@
 
 stdenv.mkDerivation rec {
   pname = "unison";
-  version = "2.51.4";
+  version = "2.51.5";
 
   src = fetchFromGitHub {
     owner = "bcpierce00";
     repo = "unison";
     rev = "v${version}";
-    sha256 = "sha256-jcfq4X+r98bQqbQ3gRqJyryLdt1Y/2CLawqqIiUaQOo=";
+    sha256 = "sha256-pi5uYwPpIy0lERmgATWQCO3EA3Pg5pnn7gxv49FaPug=";
   };
 
   nativeBuildInputs = [ makeWrapper ]