diff --git a/pkgs/development/python-modules/slack-sdk/default.nix b/pkgs/development/python-modules/slack-sdk/default.nix
index 66018d95a6e8..36a105e7dc1d 100644
--- a/pkgs/development/python-modules/slack-sdk/default.nix
+++ b/pkgs/development/python-modules/slack-sdk/default.nix
@@ -21,7 +21,7 @@
 
 buildPythonPackage rec {
   pname = "slack-sdk";
-  version = "3.18.3";
+  version = "3.18.4";
   format = "setuptools";
 
   disabled = pythonOlder "3.6";
@@ -30,7 +30,7 @@ buildPythonPackage rec {
     owner = "slackapi";
     repo = "python-slack-sdk";
     rev = "refs/tags/v${version}";
-    sha256 = "sha256-Up3W0NkN9BY6C9KWD6EPZ2sy+55f4eNFl2cP4IdcIcs=";
+    sha256 = "sha256-iQxtIpswXQWlknUoq9a7nsTCnVDP2aNUEuWco5xKnVc=";
   };
 
   propagatedBuildInputs = [