diff --git a/pkgs/development/python-modules/textfsm/default.nix b/pkgs/development/python-modules/textfsm/default.nix
index 14d7c34cf406..0bca52547c75 100644
--- a/pkgs/development/python-modules/textfsm/default.nix
+++ b/pkgs/development/python-modules/textfsm/default.nix
@@ -19,6 +19,12 @@ buildPythonPackage rec {
     hash = "sha256-IHgKG8v0X+LSK6purWBdwDnI/BCs5XA12ZJixuqqXWg=";
   };
 
+  # upstream forgot to update the release version
+  postPatch = ''
+    substituteInPlace textfsm/__init__.py \
+      --replace "1.1.2" "1.1.3"
+  '';
+
   propagatedBuildInputs = [
     six
     future