diff --git a/requirements.txt b/requirements.txt
index 830ca34..6d0df31 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -76,7 +76,7 @@ pathlib==1.0.1
 plac==0.9.6
 ply==3.11
 preshed==1.0.0
-protobuf==3.5.2.post1
+protobuf==3.15.0
 Pygments==2.2.0
 PyJWT==1.6.4
 pykwalify==1.6.0