diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index fc624704a69..e525395e161 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -25188,9 +25188,9 @@ in modules // {
 
   tornado = buildPythonPackage rec {
     name = "tornado-${version}";
-    version = "4.2.1";
+    version = "4.4.1";
 
-    propagatedBuildInputs = with self; [ backports_ssl_match_hostname_3_4_0_2 certifi ];
+    propagatedBuildInputs = with self; [ backports_abc backports_ssl_match_hostname_3_4_0_2 certifi singledispatch ];
 
     # We specify the name of the test files to prevent
     # https://github.com/NixOS/nixpkgs/issues/14634
@@ -25200,7 +25200,7 @@ in modules // {
 
     src = pkgs.fetchurl {
       url = "mirror://pypi/t/tornado/${name}.tar.gz";
-      sha256 = "a16fcdc4f76b184cb82f4f9eaeeacef6113b524b26a2cb331222e4a7fa6f2969";
+      sha256 = "371d0cf3d56c47accc66116a77ad558d76eebaa8458a6b677af71ca606522146";
     };
   };