diff --git a/pkgs/development/python-modules/fastcore/default.nix b/pkgs/development/python-modules/fastcore/default.nix
index a4f9560514be..50d008f7b741 100644
--- a/pkgs/development/python-modules/fastcore/default.nix
+++ b/pkgs/development/python-modules/fastcore/default.nix
@@ -10,7 +10,7 @@
 
 buildPythonPackage rec {
   pname = "fastcore";
-  version = "1.5.38";
+  version = "1.5.42";
   pyproject = true;
 
   disabled = pythonOlder "3.8";
@@ -19,7 +19,7 @@ buildPythonPackage rec {
     owner = "fastai";
     repo = "fastcore";
     rev = "refs/tags/${version}";
-    hash = "sha256-6b2EufBAWxKMRUGfhKq2ihRN5GRUjCeM0d8cbh7ZD8A=";
+    hash = "sha256-05rK1RT11ja4pNikcbSXhTG/euMeD0Xmc2Y74SJDbSQ=";
   };
 
   build-system = [ setuptools ];