diff --git a/pkgs/development/python-modules/idna/default.nix b/pkgs/development/python-modules/idna/default.nix
index 5e5d623ff10..13e8fb43bb2 100644
--- a/pkgs/development/python-modules/idna/default.nix
+++ b/pkgs/development/python-modules/idna/default.nix
@@ -5,11 +5,11 @@
 
 buildPythonPackage rec {
   pname = "idna";
-  version = "2.8";
+  version = "2.9";
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "c357b3f628cf53ae2c4c05627ecc484553142ca23264e593d327bcde5e9c3407";
+    sha256 = "7588d1c14ae4c77d74036e8c22ff447b26d0fde8f007354fd48a7814db15b7cb";
   };
 
   meta = {