diff --git a/pkgs/development/python-modules/django_silk/default.nix b/pkgs/development/python-modules/django_silk/default.nix
index 90ba6cf2924e..653bcdc55512 100644
--- a/pkgs/development/python-modules/django_silk/default.nix
+++ b/pkgs/development/python-modules/django_silk/default.nix
@@ -1,7 +1,9 @@
 { lib
 , buildPythonPackage
 , python
+, pythonAtLeast
 , fetchFromGitHub
+, fetchpatch
 , django
 , pygments
 , simplejson
@@ -23,15 +25,23 @@
 
 buildPythonPackage rec {
   pname = "django-silk";
-  version = "4.0.1";
+  version = "4.1.0";
 
   # pypi tarball doesn't include test project
   src = fetchFromGitHub {
     owner = "jazzband";
     repo = "django-silk";
     rev = version;
-    sha256 = "0yy9rzxvwlp2xvnw76r9hnqajlp417snam92xpb6ay0hxwslwqyb";
+    sha256 = "1km3hmx1sir0c5gqr2p1h2938slhxp2hzf10cb80q98mas8spjkn";
   };
+
+  patches = lib.optional (pythonAtLeast "3.9") (fetchpatch {
+    # should be able to remove after 4.1.1
+    name = "python-3.9-support.patch";
+    url = "https://github.com/jazzband/django-silk/commit/134089e4cad7bd3b76fb0f70c423082cb7d2b34a.patch";
+    sha256 = "09c1xd9y33h3ibiv5w9af9d79c909rgc1g5sxpd4y232h5id3c8r";
+  });
+
   # "test_time_taken" tests aren't suitable for reproducible execution, but django's
   # test runner doesn't have an easy way to ignore tests - so instead prevent it from picking
   # them up as tests