diff --git a/pkgs/development/python-modules/sly/default.nix b/pkgs/development/python-modules/sly/default.nix
index 011fa1799abd..273972cbe4ee 100644
--- a/pkgs/development/python-modules/sly/default.nix
+++ b/pkgs/development/python-modules/sly/default.nix
@@ -7,12 +7,12 @@
 
 buildPythonPackage rec {
   pname = "sly";
-  version = "0.3";
+  version = "0.4";
   disabled = pythonOlder "3.6";
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "be6a3825b042a9e1b6f5730fc747e6d983c917f0f002d798d0b9f86ca5c05ad9";
+    sha256 = "0an31bm5m8wqwphanmcsbbnmycy6l4xkmg4za4bwq8hk4dm2dwp5";
   };
 
   checkInputs = [ pytest ];
@@ -22,7 +22,7 @@ buildPythonPackage rec {
 
   meta = with lib; {
     description = "An improved PLY implementation of lex and yacc for Python 3";
-    homepage = https://github.com/dabeaz/sly;
+    homepage = "https://github.com/dabeaz/sly";
     license = licenses.bsd3;
     maintainers = [ maintainers.costrouc ];
   };