diff --git a/requirements.txt b/requirements.txt
index 7a6ac56..7b35c12 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -14,7 +14,7 @@ google-auth==1.23.0
 google-auth-httplib2==0.0.4
 google-auth-oauthlib==0.4.2
 googleapis-common-protos==1.52.0
-httplib2==0.18.1
+httplib2==0.19.0
 idna==2.10
 jdcal==1.4.1
 numpy==1.19.4