diff --git a/pkgs/development/python-modules/colormath/default.nix b/pkgs/development/python-modules/colormath/default.nix
index b749761da06c..7f9f9f1a9ce7 100644
--- a/pkgs/development/python-modules/colormath/default.nix
+++ b/pkgs/development/python-modules/colormath/default.nix
@@ -8,20 +8,26 @@
 
 buildPythonPackage rec {
   pname = "colormath";
-  version = "3.0.0";
+  # Switch to unstable which fixes an deprecation issue with newer numpy
+  # versions, should be included in versions > 3.0
+  # https://github.com/gtaylor/python-colormath/issues/104
+  version = "unstable-2021-04-17";
 
   src = fetchFromGitHub {
     owner = "gtaylor";
-    rev = "3.0.0";
     repo = "python-colormath";
-    sha256 = "1nqf5wy8ikx2g684khzvjc4iagkslmbsxxwilbv4jpaznr9lahdl";
+    rev = "4a076831fd5136f685aa7143db81eba27b2cd19a";
+    sha256 = "sha256-eACVPIQFgiGiVmQ/PjUxP/UH/hBOsCywz5PlgpA4dk4=";
   };
 
   propagatedBuildInputs = [ networkx numpy ];
 
   checkInputs = [ nose ];
+
   checkPhase = "nosetests";
 
+  pythonImportsCheck = [ "colormath" ];
+
   meta = with lib; {
     description = "Color math and conversion library";
     homepage = "https://github.com/gtaylor/python-colormath";