diff --git a/pkgs/development/python-modules/slack-sdk/default.nix b/pkgs/development/python-modules/slack-sdk/default.nix
index 2a2f3bf42fb0..cb491cf60078 100644
--- a/pkgs/development/python-modules/slack-sdk/default.nix
+++ b/pkgs/development/python-modules/slack-sdk/default.nix
@@ -21,14 +21,14 @@
 
 buildPythonPackage rec {
   pname = "slack-sdk";
-  version = "3.3.0";
+  version = "3.4.0";
   disabled = !isPy3k;
 
   src = fetchFromGitHub {
     owner = "slackapi";
     repo = "python-slack-sdk";
     rev = "v${version}";
-    sha256 = "0nr1avxycvjnvg1n8r09xi4sc5h6i4b64pzfgq14l55dgi5sv1rx";
+    sha256 = "sha256-WlHVorltN8Apq0MZUStPlJZKbBFSbnAoIBQUZYGdDiY=";
   };
 
   propagatedBuildInputs = [