diff --git a/setup.py b/setup.py
index 6bf65bc..5e4e67d 100644
--- a/setup.py
+++ b/setup.py
@@ -53,7 +53,7 @@
         'oauthlib==3.1.0',
         'opt-einsum==3.2.1',
         'pandas==1.0.5',
-        'protobuf==3.12.2',
+        'protobuf==3.18.3',
         'pyasn1==0.4.8',
         'pyasn1-modules==0.2.8',
         'python-dateutil==2.8.1',