diff --git a/pkgs/development/python-modules/pynetdicom/default.nix b/pkgs/development/python-modules/pynetdicom/default.nix
index 3339b77b9880..efcad7461e99 100644
--- a/pkgs/development/python-modules/pynetdicom/default.nix
+++ b/pkgs/development/python-modules/pynetdicom/default.nix
@@ -13,7 +13,7 @@
 
 buildPythonPackage rec {
   pname = "pynetdicom";
-  version = "2.1.0";
+  version = "2.1.1";
   pyproject = true;
 
   disabled = pythonOlder "3.7";
@@ -22,7 +22,7 @@ buildPythonPackage rec {
     owner = "pydicom";
     repo = "pynetdicom";
     rev = "refs/tags/v${version}";
-    hash = "sha256-gAgNSvNn5VsctqhbT/CzFVhwCEpZwGb1pOh0JwkuAW8=";
+    hash = "sha256-cEe0/mzmMnPoLQMx5AsJocGxCUVE512k9KlEmjzjzn4=";
   };
 
   build-system = [ poetry-core ];