diff --git a/requirements.txt b/requirements.txt
index e691908..1d88b5c 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -13,7 +13,7 @@ mypy_extensions==0.4.3
 numpy==1.19.0
 ordereddict==1.1
 Pillow==7.1.2
-protobuf==3.12.2
+protobuf==3.18.3
 pyOpenSSL==19.1.0
 pytorch_lightning==0.8.1
 scikit_learn==0.23.1