diff --git a/pkgs/development/libraries/gdcm/default.nix b/pkgs/development/libraries/gdcm/default.nix
index d2182154f71..d21fd250196 100644
--- a/pkgs/development/libraries/gdcm/default.nix
+++ b/pkgs/development/libraries/gdcm/default.nix
@@ -13,13 +13,13 @@
 
 stdenv.mkDerivation rec {
   pname = "gdcm";
-  version = "3.0.20";
+  version = "3.0.21";
 
   src = fetchFromGitHub {
     owner = "malaterre";
     repo = "GDCM";
     rev = "v${version}";
-    sha256 = "sha256-MaQk2VlaZxZPNzVF9pUnEzMaXyN0tq2P3kodnGpl6PA=";
+    sha256 = "sha256-BmUJCqCGt+BvVpLG4bzCH4lsqmhWHU0gbOIU2CCIMGU=";
   };
 
   cmakeFlags = [