diff --git a/requirements.txt b/requirements.txt
index 94a3c61..0d5ac86 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -72,7 +72,7 @@ greenlet==0.4.15
 h5py==2.8.0
 heapdict==1.0.0
 html5lib==1.0.1
-httplib2==0.17.0
+httplib2==0.18.0
 hyperlink==18.0.0
 idna==2.7
 igraph==0.1.11