diff --git a/pkgs/development/python-modules/bitlist/default.nix b/pkgs/development/python-modules/bitlist/default.nix
index 9dea05cac9ea..42fc3b5460b4 100644
--- a/pkgs/development/python-modules/bitlist/default.nix
+++ b/pkgs/development/python-modules/bitlist/default.nix
@@ -24,6 +24,11 @@ buildPythonPackage rec {
     nose
   ];
 
+  postPatch = ''
+    substituteInPlace setup.py \
+      --replace "parts~=1.0.3" "parts>=1.0.3"
+  '';
+
   pythonImportsCheck = [ "bitlist" ];
 
   meta = with lib; {
diff --git a/pkgs/development/python-modules/parts/default.nix b/pkgs/development/python-modules/parts/default.nix
index 83d7d7046f99..95f7ea9a6df2 100644
--- a/pkgs/development/python-modules/parts/default.nix
+++ b/pkgs/development/python-modules/parts/default.nix
@@ -5,11 +5,11 @@
 
 buildPythonPackage rec {
   pname = "parts";
-  version = "1.0.3";
+  version = "1.1.0";
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "a4137612bc050f606b4d6f9e6a554ebfb50633c8dd9699481f82271f84d9425f";
+    sha256 = "sha256-Xtcu/0ZO+6L7RiVfq/Jog4f7LOtZo4QUD1qi7UdPO7g=";
   };
 
   # Project has no tests