diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index cdc31afd9ceb..9457ce295e98 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -210,7 +210,7 @@ in
 
   hobbes = callPackage ../development/tools/hobbes { };
 
-  html5validator = python36Packages.callPackage ../applications/misc/html5validator { };
+  html5validator = python3Packages.callPackage ../applications/misc/html5validator { };
 
   proto-contrib = callPackage ../development/tools/proto-contrib {};