diff --git a/brozzler/__init__.py b/brozzler/__init__.py
index ae58cf5..a8d0b33 100644
--- a/brozzler/__init__.py
+++ b/brozzler/__init__.py
@@ -67,6 +67,21 @@ logging.Logger.trace = _logger_trace
 logging._levelToName[TRACE] = 'TRACE'
 logging._nameToLevel['TRACE'] = TRACE
 
+# see https://github.com/internetarchive/brozzler/issues/91
+def _logging_handler_handle(self, record):
+    rv = self.filter(record)
+    if rv:
+        try:
+            self.acquire()
+            self.emit(record)
+        finally:
+            try:
+                self.release()
+            except:
+                pass
+    return rv
+logging.Handler.handle = _logging_handler_handle
+
 _behaviors = None
 def behaviors(behaviors_dir=None):
     """Return list of JS behaviors loaded from YAML file.
diff --git a/setup.py b/setup.py
index 83841e9..bbfd2bd 100644
--- a/setup.py
+++ b/setup.py
@@ -32,7 +32,7 @@ def find_package_data(package):
 
 setuptools.setup(
         name='brozzler',
-        version='1.1b13.dev284',
+        version='1.1b13.dev285',
         description='Distributed web crawling with browsers',
         url='https://github.com/internetarchive/brozzler',
         author='Noah Levitt',