diff --git a/pkgs/development/libraries/aws-c-auth/default.nix b/pkgs/development/libraries/aws-c-auth/default.nix
index 0720b836388b..e901d8887bd4 100644
--- a/pkgs/development/libraries/aws-c-auth/default.nix
+++ b/pkgs/development/libraries/aws-c-auth/default.nix
@@ -14,13 +14,13 @@
 
 stdenv.mkDerivation rec {
   pname = "aws-c-auth";
-  version = "0.6.20";
+  version = "0.6.21";
 
   src = fetchFromGitHub {
     owner = "awslabs";
     repo = "aws-c-auth";
     rev = "v${version}";
-    sha256 = "sha256-d6o+ClQMhoSU8wjdP0nr+g6r4ZqzXhxBJcEfTOSlS7o=";
+    sha256 = "sha256-RVwSSr0EgVnZt/uUAldWQdjBw6/L+CHUutWcinysvNw=";
   };
 
   nativeBuildInputs = [