diff --git a/pkgs/development/python-modules/dask/default.nix b/pkgs/development/python-modules/dask/default.nix
index d55595d456f..a857925d7b7 100644
--- a/pkgs/development/python-modules/dask/default.nix
+++ b/pkgs/development/python-modules/dask/default.nix
@@ -15,13 +15,13 @@
 
 buildPythonPackage rec {
   pname = "dask";
-  version = "2.6.0";
+  version = "2.9.0";
 
   disabled = pythonOlder "3.5";
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "81c7891f0d2e7ac03d1f7fabf1f639360a1db52c03a7155ba9b08e9ee6280f2b";
+    sha256 = "1w1hqr8vyx6ygwflj2737dcy0mmgvrc0s602gnny8pzlcbs9m76b";
   };
 
   checkInputs = [ pytest ];