diff --git a/pkgs/development/python-modules/mitmproxy-macos/default.nix b/pkgs/development/python-modules/mitmproxy-macos/default.nix
index 3193cc4b405d..551e0f9911b2 100644
--- a/pkgs/development/python-modules/mitmproxy-macos/default.nix
+++ b/pkgs/development/python-modules/mitmproxy-macos/default.nix
@@ -10,13 +10,14 @@ buildPythonPackage rec {
   inherit (mitmproxy-rs) version;
   format = "wheel";
 
+  # Note: if this isn't downloading, its because mitmproxy-rs updated without also updating this.
   src = fetchPypi {
     pname = "mitmproxy_macos";
     inherit version;
     format = "wheel";
     dist = "py3";
     python = "py3";
-    hash = "sha256-NArp10yhERk7Hhw5fIU+ekbupyldyzpLQdKgebiUpOM=";
+    hash = "sha256-baAfEY4hEN3wOEicgE53gY71IX003JYFyyZaNJ7U8UA=";
   };
 
   # repo has no python tests