diff --git a/pkgs/development/libraries/science/math/openblas/default.nix b/pkgs/development/libraries/science/math/openblas/default.nix
index 8e5d71801158..79387a227d13 100644
--- a/pkgs/development/libraries/science/math/openblas/default.nix
+++ b/pkgs/development/libraries/science/math/openblas/default.nix
@@ -129,7 +129,7 @@ let
 in
 stdenv.mkDerivation rec {
   pname = "openblas";
-  version = "0.3.20";
+  version = "0.3.21";
 
   outputs = [ "out" "dev" ];
 
@@ -137,7 +137,7 @@ stdenv.mkDerivation rec {
     owner = "xianyi";
     repo = "OpenBLAS";
     rev = "v${version}";
-    sha256 = "sha256-FLPVcepf7tv/es+4kur9Op7o3iVAAayuYN4hY/P4mmQ=";
+    sha256 = "sha256-F6cXPqQai4kA5zrsa8E0Q7dD9zZHlwZ+B16EOGNXoXs=";
   };
 
   inherit blas64;