1 files changed, 1 insertions, 1 deletions
diff --git a/pkgs/development/python-modules/hopcroftkarp/default.nix b/pkgs/development/python-modules/hopcroftkarp/default.nix
index 995f10073c6..775ff1a50f5 100644
--- a/pkgs/development/python-modules/hopcroftkarp/default.nix
+++ b/pkgs/development/python-modules/hopcroftkarp/default.nix
@@ -18,7 +18,7 @@ buildPythonPackage rec {
   meta = with lib; {
     description = "Implementation of HopcroftKarp's algorithm";
     homepage = "https://github.com/sofiat-olaosebikan/hopcroftkarp";
-    license = licenses.gpl1;
+    license = licenses.gpl3Only;
     maintainers = [ maintainers.costrouc ];
   };
 }