diff --git a/pkgs/development/python-modules/pyfunctional/default.nix b/pkgs/development/python-modules/pyfunctional/default.nix
index 704870e9e14f..e3a42ca3cd59 100644
--- a/pkgs/development/python-modules/pyfunctional/default.nix
+++ b/pkgs/development/python-modules/pyfunctional/default.nix
@@ -10,7 +10,7 @@
 
 buildPythonPackage {
   pname = "pyfunctional";
-  version = "1.5.0";
+  version = "1.4.3";
   pyproject = true;
 
   src = fetchFromGitHub {