diff --git a/pkgs/servers/sql/mariadb/connector-c/3_1.nix b/pkgs/servers/sql/mariadb/connector-c/3_1.nix
index 40a00313639b..f5de11c7cc11 100644
--- a/pkgs/servers/sql/mariadb/connector-c/3_1.nix
+++ b/pkgs/servers/sql/mariadb/connector-c/3_1.nix
@@ -1,6 +1,6 @@
 { callPackage, ... } @ args:
 
 callPackage ./. (args // {
-  version = "3.1.13";
-  sha256 = "0xb8fiissblxb319y5ifqqp86zblwis789ipb753pcb4zpnsaw82";
+  version = "3.1.21";
+  hash = "sha256-PovyQvomT8+vGWS39/QjLauiGkSiuqKQpTrSXdyVyow=";
 })
diff --git a/pkgs/servers/sql/mariadb/connector-c/default.nix b/pkgs/servers/sql/mariadb/connector-c/default.nix
index dbf8e36e9e7d..578aad31440a 100644
--- a/pkgs/servers/sql/mariadb/connector-c/default.nix
+++ b/pkgs/servers/sql/mariadb/connector-c/default.nix
@@ -1,7 +1,7 @@
 { lib, stdenv, fetchurl, cmake
 , curl, openssl, zlib
 , libiconv
-, version, sha256, ...
+, version, hash, ...
 }:
 
 with lib;
@@ -12,7 +12,7 @@ stdenv.mkDerivation {
 
   src = fetchurl {
     url = "https://downloads.mariadb.com/Connectors/c/connector-c-${version}/mariadb-connector-c-${version}-src.tar.gz";
-    inherit sha256;
+    inherit hash;
   };
 
   outputs = [ "out" "dev" ];