diff --git a/overviewer_core/logger.py b/overviewer_core/logger.py
index 96850cf..70acf21 100644
--- a/overviewer_core/logger.py
+++ b/overviewer_core/logger.py
@@ -267,15 +267,15 @@ def configure(loglevel=logging.INFO, verbose=False):
 
     logger = logging.getLogger()
 
-    outstream = sys.stderr
+    outstream = sys.stdout
 
     if platform.system() == 'Windows':
         # Our custom output stream processor knows how to deal with select ANSI
         # color escape sequences
-        outstream = WindowsOutputStream()
+        outstream = WindowsOutputStream(outstream)
         formatter = ANSIColorFormatter(verbose)
 
-    elif sys.stderr.isatty():
+    elif outstream.isatty():
         # terminal logging with ANSI color
         formatter = ANSIColorFormatter(verbose)
 
diff --git a/overviewer_core/settingsDefinition.py b/overviewer_core/settingsDefinition.py
index 7d1625f..e78c589 100644
--- a/overviewer_core/settingsDefinition.py
+++ b/overviewer_core/settingsDefinition.py
@@ -97,9 +97,9 @@ processes = Setting(required=True, validator=int, default=-1)
 # ends up adding overhead and isn't worth it.
 memcached_host = Setting(required=False, validator=str, default=None)
 
-if platform.system() == 'Windows' or not sys.stderr.isatty():
+if platform.system() == 'Windows' or not sys.stdout.isatty():
     obs = LoggingObserver()
 else:
-    obs = ProgressBarObserver()
+    obs = ProgressBarObserver(fd=sys.stdout)
 
 observer = Setting(required=True, validator=validateObserver, default=obs)