diff --git a/pkgs/development/libraries/pkcs11helper/default.nix b/pkgs/development/libraries/pkcs11helper/default.nix
index 9094eca26e5d..f59c538856ca 100644
--- a/pkgs/development/libraries/pkcs11helper/default.nix
+++ b/pkgs/development/libraries/pkcs11helper/default.nix
@@ -2,13 +2,13 @@
 
 stdenv.mkDerivation rec {
   name = "pkcs11-helper-${version}";
-  version = "1.11";
+  version = "1.21";
 
   src = fetchFromGitHub {
     owner = "OpenSC";
     repo = "pkcs11-helper";
     rev = "${name}";
-    sha256 = "1bfsmy9w2qf7avvs3rsc1ycqczzzw0j2wsqkd2fj4dc1fqzigq2q";
+    sha256 = "17a2cssycl7fh44xikmhszigx57vvn0h2sjsnmsy3772kfj796b1";
   };
 
   buildInputs = [ pkgconfig openssl autoreconfHook ];