diff --git a/pkgs/development/python-modules/immutabledict/default.nix b/pkgs/development/python-modules/immutabledict/default.nix
index 4628776bfcd1..a0a699eff087 100644
--- a/pkgs/development/python-modules/immutabledict/default.nix
+++ b/pkgs/development/python-modules/immutabledict/default.nix
@@ -8,14 +8,14 @@
 
 buildPythonPackage rec {
   pname = "immutabledict";
-  version = "4.3.0";
+  version = "4.3.1";
   pyproject = true;
 
   src = fetchFromGitHub {
     owner = "corenting";
     repo = "immutabledict";
     tag = "v${version}";
-    hash = "sha256-Ap0Z0RCL+sjPTySa/At+SDRdCmSkooSekybugZdvUX0=";
+    hash = "sha256-BZ3qiYZtw5YcWTy2rtlDZE3J1Hia9/Yniy+I7xhq7AE=";
   };
 
   build-system = [ poetry-core ];