diff --git a/pkgs/development/python-modules/dulwich/default.nix b/pkgs/development/python-modules/dulwich/default.nix
index dd067514cccc..55d1f61b826f 100644
--- a/pkgs/development/python-modules/dulwich/default.nix
+++ b/pkgs/development/python-modules/dulwich/default.nix
@@ -4,12 +4,12 @@
 , git, glibcLocales }:
 
 buildPythonPackage rec {
-  version = "0.20.14";
+  version = "0.20.15";
   pname = "dulwich";
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "21d6ee82708f7c67ce3fdcaf1f1407e524f7f4f7411a410a972faa2176baec0d";
+    sha256 = "1248942fr12av2rkzpm2fq0qn6rajvv2lcgq65h8kby27qvp65zv";
   };
 
   LC_ALL = "en_US.UTF-8";