diff --git a/pkgs/by-name/pe/petsc/package.nix b/pkgs/by-name/pe/petsc/package.nix
index ebe5564441ca..3db7a522fff6 100644
--- a/pkgs/by-name/pe/petsc/package.nix
+++ b/pkgs/by-name/pe/petsc/package.nix
@@ -29,11 +29,11 @@ assert petsc-withp4est -> p4est.mpiSupport;
 
 stdenv.mkDerivation rec {
   pname = "petsc";
-  version = "3.21.3";
+  version = "3.21.4";
 
   src = fetchzip {
     url = "https://web.cels.anl.gov/projects/petsc/download/release-snapshots/petsc-${version}.tar.gz";
-    hash = "sha256-dxHa8JUJCN4zRIXMCx7gcvbzFH2SPtkJ377ssIevjgU=";
+    hash = "sha256-l7v+ASBL9FLbBmBGTRWDwBihjwLe3uLz+GwXtn8u7e0=";
   };
 
   strictDeps = true;