diff --git a/pkgs/by-name/po/postfix-tlspol/package.nix b/pkgs/by-name/po/postfix-tlspol/package.nix
index 627a0309d56f..1aacf8b93fb5 100644
--- a/pkgs/by-name/po/postfix-tlspol/package.nix
+++ b/pkgs/by-name/po/postfix-tlspol/package.nix
@@ -7,13 +7,13 @@
 
 buildGoModule rec {
   pname = "postfix-tlspol";
-  version = "1.8.20";
+  version = "1.8.21";
 
   src = fetchFromGitHub {
     owner = "Zuplu";
     repo = "postfix-tlspol";
     tag = "v${version}";
-    hash = "sha256-/+FWTrb39PB1L6UDXAr3w0c0bMrpptX23g8WHI794GA=";
+    hash = "sha256-EBgP2gwq3pei2TBNuinyY2PgLKaV6PBmk3aCkecGvk4=";
   };
 
   vendorHash = null;