diff --git a/pkgs/development/tools/ktlint/default.nix b/pkgs/development/tools/ktlint/default.nix
index b26c328dba85..7e71c08ec4b1 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 = "0.39.0";
+  version = "0.40.0";
 
   src = fetchurl {
     url = "https://github.com/shyiko/ktlint/releases/download/${version}/ktlint";
-    sha256 = "0lvi4d731ypdjcskj0hdfd37wa3ldspibs2dgaahg7d7zhp1l76g";
+    sha256 = "17n1xdalz38h9p4ylcpkbbqp22b1np5l8y5l3r58kaf9k8p6cfa7";
   };
 
   nativeBuildInputs = [ makeWrapper ];