diff --git a/pkgs/development/python-modules/anthropic/default.nix b/pkgs/development/python-modules/anthropic/default.nix
index b9248fcb8716..a7bbb6fb2bd6 100644
--- a/pkgs/development/python-modules/anthropic/default.nix
+++ b/pkgs/development/python-modules/anthropic/default.nix
@@ -1,6 +1,7 @@
 { lib
 , buildPythonPackage
 , fetchFromGitHub
+, fetchpatch
 , poetry-core
 , anyio
 , distro
@@ -16,7 +17,7 @@
 
 buildPythonPackage rec {
   pname = "anthropic";
-  version = "0.3.6";
+  version = "0.3.8";
   format = "pyproject";
 
   disabled = pythonOlder "3.8";
@@ -25,9 +26,17 @@ buildPythonPackage rec {
     owner = "anthropics";
     repo = "anthropic-sdk-python";
     rev = "refs/tags/v${version}";
-    hash = "sha256-dfMlM7IRP1PG7Ynr+MR4OPeKnHBbhhWKSug7UQ4/4rI=";
+    hash = "sha256-rNLKIZKX9AI0IKGicozllh+XGU4Ll91EfRaAfJYJtJE=";
   };
 
+  patches = [
+    (fetchpatch {
+      name = "support-pytest-asyncio-0.21.0.patch";
+      url = "https://github.com/anthropics/anthropic-sdk-python/commit/1e199aa9b38970c5b5b4492907494ac653a7f756.patch";
+      hash = "sha256-f9KldnvXuRKVgT7Xb/xdhInKOeXvi4g5OxVRD0PMhgQ=";
+    })
+  ];
+
   nativeBuildInputs = [
     poetry-core
   ];