diff --git a/requirements.txt b/requirements.txt
index e6578031a037ce89054db061c2582dea4d91fdca..fd0dfe8d8ca4790a60d45de3b4466992107df2c1 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -12,6 +12,7 @@ netcdf4==1.6.0
 numpy~=1.19.2
 pandas==1.3.4
 partd==1.2.0
+protobuf==3.20.*
 psutil==5.9.1
 pydot==1.4.2
 pytest==6.2.2