diff --git a/pkgs/tools/text/yaml-merge/default.nix b/pkgs/tools/text/yaml-merge/default.nix
index 921437c25712..85ea3cd360da 100644
--- a/pkgs/tools/text/yaml-merge/default.nix
+++ b/pkgs/tools/text/yaml-merge/default.nix
@@ -2,13 +2,13 @@
 
 stdenv.mkDerivation {
   pname = "yaml-merge";
-  version = "unstable-2016-02-16";
+  version = "unstable-2022-01-12";
 
   src = fetchFromGitHub {
     owner = "abbradar";
     repo = "yaml-merge";
-    rev = "4eef7b68632d79dec369b4eff5a8c63f995f81dc";
-    sha256 = "0mwda2shk43i6f22l379fcdchmb07fm7nf4i2ii7fk3ihkhb8dgp";
+    rev = "2f0174fe92fc283dd38063a3a14f7fe71db4d9ec";
+    sha256 = "sha256-S2eZw+FOZvOn0XupZDRNcolUPd4PhvU1ziu+kx2AwnY=";
   };
 
   pythonPath = with python3Packages; [ pyyaml ];