diff --git a/setup.py b/setup.py
index 27dde45..ceb9886 100755
--- a/setup.py
+++ b/setup.py
@@ -2,7 +2,7 @@
 '''
 setup.py - setuptools installation configuration for warcprox
 
-Copyright (C) 2013-2018 Internet Archive
+Copyright (C) 2013-2019 Internet Archive
 
 This program is free software; you can redistribute it and/or
 modify it under the terms of the GNU General Public License
@@ -25,13 +25,14 @@ import setuptools
 
 deps = [
     'certauth==1.1.6',
-    'warctools>=4.10.0',
+    'warctools>=4.10.0,<=4.10.0',
     'urlcanon>=0.1.dev16',
     'doublethink>=0.2.0.dev87',
     'urllib3>=1.23',
     'requests>=2.0.1',
     'PySocks>=1.6.8',
     'cryptography>=2.3',
+    'idna>=2.5',
 ]
 try:
     import concurrent.futures
@@ -40,7 +41,7 @@ except:
 
 setuptools.setup(
         name='warcprox',
-        version='2.4b3.dev192',
+        version='2.4b4.dev195',
         description='WARC writing MITM HTTP/S proxy',
         url='https://github.com/internetarchive/warcprox',
         author='Noah Levitt',
@@ -66,6 +67,7 @@ setuptools.setup(
             'Programming Language :: Python :: 3.4',
             'Programming Language :: Python :: 3.5',
             'Programming Language :: Python :: 3.6',
+            'Programming Language :: Python :: 3.7',
             'Topic :: Internet :: Proxy Servers',
             'Topic :: Internet :: WWW/HTTP',
             'Topic :: Software Development :: Libraries :: Python Modules',
diff --git a/warcprox/writerthread.py b/warcprox/writerthread.py
index f6ac277..b929a7f 100644
--- a/warcprox/writerthread.py
+++ b/warcprox/writerthread.py
@@ -57,6 +57,7 @@ class WarcWriterProcessor(warcprox.BaseStandardPostfetchProcessor):
                 self.writer_pool.close_for_prefix(prefix)
             except queue.Empty:
                 break
+        self.writer_pool.maybe_idle_rollover()
         super()._get_process_put()
 
     def close_for_prefix(self, prefix=None):