diff --git a/fbchat/__init__.py b/fbchat/__init__.py
index c68bba3..329459d 100644
--- a/fbchat/__init__.py
+++ b/fbchat/__init__.py
@@ -17,7 +17,7 @@ from .client import *
 
 
 __copyright__ = 'Copyright 2015 - {} by Taehoon Kim'.format(datetime.now().year)
-__version__ = '1.3.5'
+__version__ = '1.3.6'
 __license__ = 'BSD'
 __author__ = 'Taehoon Kim; Moreels Pieter-Jan; Mads Marquart'
 __email__ = 'carpedm20@gmail.com'
diff --git a/fbchat/client.py b/fbchat/client.py
index 045cd0d..4698155 100644
--- a/fbchat/client.py
+++ b/fbchat/client.py
@@ -1269,9 +1269,9 @@ class Client(object):
         :raises: FBchatException if request failed
         """
         data = {
-            "ids[%s]" % thread_id: True,
+            "ids[%s]" % thread_id: 'true',
             "watermarkTimestamp": now(),
-            "shouldSendReadReceipt": True,
+            "shouldSendReadReceipt": 'true',
         }
 
         r = self._post(self.req_url.READ_STATUS, data)