diff --git a/pkgs/development/python-modules/pynetdicom/default.nix b/pkgs/development/python-modules/pynetdicom/default.nix
index 77308a1966b..fe8c7d73bc9 100644
--- a/pkgs/development/python-modules/pynetdicom/default.nix
+++ b/pkgs/development/python-modules/pynetdicom/default.nix
@@ -10,13 +10,13 @@
 
 buildPythonPackage rec {
   pname = "pynetdicom";
-  version = "1.5.5";
+  version = "1.5.6";
 
   src = fetchFromGitHub {
     owner = "pydicom";
     repo = pname;
     rev = "v${version}";
-    sha256 = "0zjpscxdhlcv99py7jx5r6dw32nzbcr49isrzkdr6g3zwyxwzbfm";
+    sha256 = "sha256-xYwnv30I0+CAx4QODSeMNhdlM2NuM8v4J3rx99NdYCc=";
   };
 
   propagatedBuildInputs = [
@@ -32,6 +32,7 @@ buildPythonPackage rec {
   disabledTests = [
     # Some tests needs network capabilities
     "test_str_types_empty"
+    "test_associate_reject"
     "TestEchoSCP"
     "TestEchoSCPCLI"
     "TestStoreSCP"
@@ -49,7 +50,7 @@ buildPythonPackage rec {
     homepage = "https://github.com/pydicom/pynetdicom";
     license = with licenses; [ mit ];
     maintainers = with maintainers; [ fab ];
-    # Tests are not passing on Darwin, thus it's assumed that it doesn't work
-    broken = stdenv.isDarwin;
+    # Tests are not passing on Darwin/Aarch64, thus it's assumed that it doesn't work
+    broken = stdenv.isDarwin || stdenv.isAarch64;
   };
 }