diff --git a/requirements.txt b/requirements.txt
index 528725f..868b2f7 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -5,7 +5,7 @@ future==0.16.0
 idna==2.6
 mysql-connector-python==8.0.11
 oauthlib==2.0.7
-protobuf==3.5.2.post1
+protobuf==3.18.3
 python-twitter==3.4.1
 requests==2.18.4
 requests-oauthlib==0.8.0