diff --git a/pkgs/development/python-modules/dask/default.nix b/pkgs/development/python-modules/dask/default.nix
index 86fc85f8d69..93351de1125 100644
--- a/pkgs/development/python-modules/dask/default.nix
+++ b/pkgs/development/python-modules/dask/default.nix
@@ -12,11 +12,11 @@
 
 buildPythonPackage rec {
   pname = "dask";
-  version = "0.20.2";
+  version = "1.1.1";
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "d4139a03ab5eb6cedeb06cf1e39af90fb5226ca214d77408def7677d7e6b7af3";
+    sha256 = "2e70135d6856805699b52774d8e0cec41beda92bdfc9f9c776962b4bfb34822c";
   };
 
   checkInputs = [ pytest ];