diff --git a/requirements.txt b/requirements.txt
index 8e310f7..161f567 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -30,7 +30,7 @@ numpy==1.19.1
 oauthlib==3.1.0
 opt-einsum==3.3.0
 Pillow==7.2.0
-protobuf==3.12.2
+protobuf==3.15.0
 py2app==0.19
 pyasn1==0.4.8
 pyasn1-modules==0.2.8