diff --git a/requirements.txt b/requirements.txt
index 84988a6..f38d829 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -8,6 +8,7 @@ pycountry>=23.12.11
 python-dateutil>=2.8.2
 urllib3>=2.0.7
 chardet>=5.2.0
+protobuf>=3.20.0
 pycryptodome>=3.19.0
 
 # Optional but recommended