diff --git a/pkgs/development/tools/ktlint/default.nix b/pkgs/development/tools/ktlint/default.nix
index 83ecedf8a640..89039fabfbe3 100644
--- a/pkgs/development/tools/ktlint/default.nix
+++ b/pkgs/development/tools/ktlint/default.nix
@@ -2,11 +2,11 @@
 
 stdenv.mkDerivation rec {
   pname = "ktlint";
-  version = "1.1.1";
+  version = "1.2.1";
 
   src = fetchurl {
     url = "https://github.com/pinterest/ktlint/releases/download/${version}/ktlint";
-    sha256 = "sha256:01cl4jaa2bq52wii1wkzsy6sw546xh8wa8kyhvnfwp34m9d32r4w";
+    sha256 = "sha256:14pbjih8gkh5cp9cqpbciml4ba7nvq5vmvivyrmhff3xq93cya1f";
   };
 
   nativeBuildInputs = [ makeWrapper ];