diff --git a/pkgs/python-packages.nix b/pkgs/python-packages.nix
--- a/pkgs/python-packages.nix
+++ b/pkgs/python-packages.nix
@@ -335,14 +335,14 @@ self: super: {
     };
   };
   "more-itertools" = super.buildPythonPackage {
-    name = "more-itertools-4.2.0";
+    name = "more-itertools-4.3.0";
     doCheck = false;
     propagatedBuildInputs = [
       self."six"
     ];
     src = fetchurl {
-      url = "https://files.pythonhosted.org/packages/c0/2f/6773347277d76c5ade4414a6c3f785ef27e7f5c4b0870ec7e888e66a8d83/more-itertools-4.2.0.tar.gz";
-      sha256 = "1s6qhl7a7jy8gqw8p545rxfp7rwz1hmjr9p6prk93zbv6f9rhsrb";
+      url = "https://files.pythonhosted.org/packages/88/ff/6d485d7362f39880810278bdc906c13300db05485d9c65971dec1142da6a/more-itertools-4.3.0.tar.gz";
+      sha256 = "17h3na0rdh8xq30w4b9pizgkdxmm51896bxw600x84jflg9vaxn4";
     };
     meta = {
       license = [ pkgs.lib.licenses.mit ];