diff --git a/pkgs/development/python-modules/idna/default.nix b/pkgs/development/python-modules/idna/default.nix
index c6c917852319..7278212bf772 100644
--- a/pkgs/development/python-modules/idna/default.nix
+++ b/pkgs/development/python-modules/idna/default.nix
@@ -8,14 +8,14 @@
 
 buildPythonPackage rec {
   pname = "idna";
-  version = "3.15";
+  version = "3.18";
   pyproject = true;
 
   src = fetchFromGitHub {
     owner = "kjd";
     repo = "idna";
     tag = "v${version}";
-    hash = "sha256-z3Nd834inihGzquCAmejUQvRcM0Yn/VmMcWQP3oh4ak=";
+    hash = "sha256-9nLy/9PNuLSQJsf4Jes0uN695+LGjz2LXlfiZxxvGV4=";
   };
 
   build-system = [ flit-core ];