diff --git a/zoho/requirements.txt b/zoho/requirements.txt
index 0df06bc..4f2a01c 100644
--- a/zoho/requirements.txt
+++ b/zoho/requirements.txt
@@ -1,6 +1,6 @@
 appdirs==1.4.3
 gspread==0.6.2
-httplib2==0.10.3
+httplib2==0.19.0
 numpy==1.12.1
 oauth2client==4.0.0
 packaging==16.8