diff --git a/requirements.txt b/requirements.txt
index 86cdd42..4d6ad5e 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -18,7 +18,7 @@ Jinja2==3.0.1
 MarkupSafe==2.0.1
 packaging==21.0
 Pillow==8.3.1
-protobuf==3.13
+protobuf==3.15.0
 pyasn1==0.4.2
 pyasn1-modules==0.2.1
 pycparser==2.18