diff --git a/pkgs/development/python-modules/premailer/default.nix b/pkgs/development/python-modules/premailer/default.nix
index 8523a47b71a7..21214b5fe752 100644
--- a/pkgs/development/python-modules/premailer/default.nix
+++ b/pkgs/development/python-modules/premailer/default.nix
@@ -4,12 +4,12 @@
 
 buildPythonPackage rec {
   pname = "premailer";
-  version = "3.9.0";
+  version = "3.10.0";
   disabled = isPy27; # no longer compatible with urllib
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "da18b9e8cb908893b67ab9b7451276fef7c0ab179f40189378545f6bb0ab3695";
+    sha256 = "d1875a8411f5dc92b53ef9f193db6c0f879dc378d618e0ad292723e388bfe4c2";
   };
 
   buildInputs = [ mock nose ];