diff --git a/googleanalytics/columns.py b/googleanalytics/columns.py
index <HASH>..<HASH> 100644
--- a/googleanalytics/columns.py
+++ b/googleanalytics/columns.py
@@ -25,9 +25,15 @@ DIMENSIONS = {
 
 
 def escape_chars(value, chars=',;'):
+    if value is True:
+        return 'Yes'
+    elif value is False:
+        return 'No'
+    
     value = utils.unicode(value)
     for char in chars:
         value = value.replace(char, '\\' + char)
+    
     return value
 
 def escape(method):
diff --git a/setup.py b/setup.py
index <HASH>..<HASH> 100644
--- a/setup.py
+++ b/setup.py
@@ -7,7 +7,7 @@ setup(name='googleanalytics',
     author_email='stijn@debrouwere.org',
     url='https://github.com/debrouwere/google-analytics/',
     download_url='http://www.github.com/debrouwere/google-analytics/tarball/master',
-    version='0.19.4',
+    version='0.19.5',
     license='ISC',
     packages=find_packages(),
     keywords='data analytics api wrapper google',
Serialize True and False query arguments into Yes and No.