diff --git a/pkgs/development/python-modules/dask/default.nix b/pkgs/development/python-modules/dask/default.nix
index 93351de1125..8a2bd2187f9 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 = "1.1.1";
+  version = "1.1.5";
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "2e70135d6856805699b52774d8e0cec41beda92bdfc9f9c776962b4bfb34822c";
+    sha256 = "4b0b82a4d61714d3a49953274b1a8a689a51eacf89c4c2ff18aa7f6282ce515e";
   };
 
   checkInputs = [ pytest ];