diff --git a/uproot/source/xrootd.py b/uproot/source/xrootd.py
index cf32c04a..3eed1909 100644
--- a/uproot/source/xrootd.py
+++ b/uproot/source/xrootd.py
@@ -18,7 +18,7 @@ def __init__(self, path, timeout=None, *args, **kwds):
         self.timeout = timeout
         super(XRootDSource, self).__init__(path, *args, **kwds)
 
-    defaults = {"timeout": None, "chunkbytes": 32*1024, "limitbytes": 32*1024**2, "parallel": True}
+    defaults = {"timeout": None, "chunkbytes": 32*1024, "limitbytes": 32*1024**2, "parallel": False}
 
     def _open(self):
         try:
diff --git a/uproot/version.py b/uproot/version.py
index 8f3aa7c9..41589aac 100644
--- a/uproot/version.py
+++ b/uproot/version.py
@@ -4,7 +4,7 @@
 
 import re
 
-__version__ = "3.6.1"
+__version__ = "3.6.2"
 version = __version__
 version_info = tuple(re.split(r"[-\.]", __version__))