diff --git a/setup.py b/setup.py
index 53f754a5d..85b7efc80 100644
--- a/setup.py
+++ b/setup.py
@@ -19,8 +19,10 @@
 print(f'Python {sys.version_info.major}.{sys.version_info.minor} detected.')
 if sys.version_info[:2] < (3, 11):
     import pkg_resources
+    # setuptools 66+ no longer supports Python 3.7, newer runtimes work with any recent version.
+    setuptools_req = 'setuptools>=45, <66' if sys.version_info[:2] < (3, 8) else 'setuptools>=45'
     try:
-        pkg_resources.require(['pip>=18', 'setuptools>=45, <66'])
+        pkg_resources.require(['pip>=18', setuptools_req])
     except (pkg_resources.VersionConflict, pkg_resources.DistributionNotFound):
         print(
             '\033[93mTry update pip/setuptools versions, for example, '
diff --git a/superbench/runner/runner.py b/superbench/runner/runner.py
index a5ac13cbb..e80ece005 100644
--- a/superbench/runner/runner.py
+++ b/superbench/runner/runner.py
@@ -154,8 +154,11 @@ def __get_mode_command(self, benchmark_name, mode, timeout=None):
         elif mode.name == 'torch.distributed':
             # TODO: replace with torch.distributed.run in v1.9
             # TODO: only supports node_num=1 and node_num=all currently
+            # For single-node runs use torchrun's standalone rendezvous, which binds a random free
+            # port instead of the fixed default (29500). This avoids transient EADDRINUSE failures
+            # when consecutive distributed benchmarks reuse the same rendezvous port.
             torch_dist_params = (
-                '' if 'node_num' in mode and mode.node_num == 1 else
+                '--standalone ' if 'node_num' in mode and mode.node_num == 1 else
                 '--nnodes=$NNODES --node_rank=$NODE_RANK --master_addr=$MASTER_ADDR --master_port=$MASTER_PORT '
             )
 
diff --git a/tests/runner/test_runner.py b/tests/runner/test_runner.py
index fd45ae0a8..2280a5fc7 100644
--- a/tests/runner/test_runner.py
+++ b/tests/runner/test_runner.py
@@ -141,6 +141,7 @@ def test_get_mode_command(self):
                 'expected_command': (
                     'torchrun '
                     '--no_python --nproc_per_node=8 '
+                    '--standalone '
                     f'sb exec --output-dir {self.sb_output_dir} -c sb.config.yaml -C superbench.enable=foo '
                     'superbench.benchmarks.foo.parameters.distributed_impl=ddp '
                     'superbench.benchmarks.foo.parameters.distributed_backend=nccl'