diff --git a/pkgs/development/python-modules/posthog/default.nix b/pkgs/development/python-modules/posthog/default.nix
index 8cdbe2b964dc..99103bf5404e 100644
--- a/pkgs/development/python-modules/posthog/default.nix
+++ b/pkgs/development/python-modules/posthog/default.nix
@@ -15,6 +15,7 @@
   requests,
   setuptools,
   six,
+  typing-extensions,
 }:
 
 buildPythonPackage rec {
@@ -38,6 +39,7 @@ buildPythonPackage rec {
     python-dateutil
     requests
     six
+    typing-extensions
   ];
 
   nativeCheckInputs = [