diff --git a/pkgs/development/python-modules/dask/default.nix b/pkgs/development/python-modules/dask/default.nix
index b51ac1701a2e..208856490b86 100644
--- a/pkgs/development/python-modules/dask/default.nix
+++ b/pkgs/development/python-modules/dask/default.nix
@@ -20,14 +20,14 @@
 
 buildPythonPackage rec {
   pname = "dask";
-  version = "2021.06.1";
+  version = "2021.06.2";
   disabled = pythonOlder "3.5";
 
   src = fetchFromGitHub {
     owner = "dask";
     repo = pname;
     rev = version;
-    sha256 = "sha256-wrUqLSmlKhd0NSjWBwbow8aX53ZBTgl2n4lEmvxC3bs=";
+    sha256 = "sha256-qvfjdijzlqaJQrDztRAVr5PudTaVd3WOTBid2ElZQgg=";
   };
 
   propagatedBuildInputs = [
diff --git a/pkgs/development/python-modules/distributed/default.nix b/pkgs/development/python-modules/distributed/default.nix
index 605e905d4ab4..ce0cf13e9a92 100644
--- a/pkgs/development/python-modules/distributed/default.nix
+++ b/pkgs/development/python-modules/distributed/default.nix
@@ -6,7 +6,6 @@
 , dask
 , msgpack
 , psutil
-, six
 , sortedcontainers
 , tblib
 , toolz
@@ -20,27 +19,39 @@
 
 buildPythonPackage rec {
   pname = "distributed";
-  version = "2021.6.1";
+  version = "2021.6.2";
   disabled = pythonOlder "3.6";
 
   # get full repository need conftest.py to run tests
   src = fetchPypi {
     inherit pname version;
-    sha256 = "sha256-Z79h/WAio5diX2myChx8HPAWe2RB4Ajw7Ybch4XUYFc=";
+    sha256 = "sha256-19ESqGqwSdzvo7If0brqQhKiwD0iwkvVWtONIaf10Ug=";
   };
 
   propagatedBuildInputs = [
-      click cloudpickle dask msgpack psutil six
-      sortedcontainers tblib toolz tornado zict pyyaml mpi4py bokeh
+    bokeh
+    click
+    cloudpickle
+    dask
+    mpi4py
+    msgpack
+    psutil
+    pyyaml
+    sortedcontainers
+    tblib
+    toolz
+    tornado
+    zict
   ];
 
   # when tested random tests would fail and not repeatably
   doCheck = false;
+
   pythonImportsCheck = [ "distributed" ];
 
   meta = with lib; {
-    description = "Distributed computation in Python.";
-    homepage = "https://distributed.readthedocs.io/en/latest/";
+    description = "Distributed computation in Python";
+    homepage = "https://distributed.readthedocs.io/";
     license = licenses.bsd3;
     platforms = platforms.x86; # fails on aarch64
     maintainers = with maintainers; [ teh costrouc ];