diff --git a/pkgs/development/php-packages/spx/default.nix b/pkgs/development/php-packages/spx/default.nix
index bfea69412d59..2b941d458943 100644
--- a/pkgs/development/php-packages/spx/default.nix
+++ b/pkgs/development/php-packages/spx/default.nix
@@ -6,7 +6,7 @@
 }:
 
 let
-  version = "0.4.20";
+  version = "0.4.21";
 in
 buildPecl {
   inherit version;
@@ -16,7 +16,7 @@ buildPecl {
     owner = "NoiseByNorthwest";
     repo = "php-spx";
     rev = "v${version}";
-    hash = "sha256-2MOl9waWY3zK5NzQ19TJKK8kE7xC4K+e9AwV+wyAHZc=";
+    hash = "sha256-3rVnKUZZXLxoKCW717pCiPOVWDudQpoN8lC1jQzpwuw=";
   };
 
   configureFlags = [