diff --git a/extraction/named_entity/CDMA/requirements.txt b/extraction/named_entity/CDMA/requirements.txt
index 313ed529..8abc12ab 100644
--- a/extraction/named_entity/CDMA/requirements.txt
+++ b/extraction/named_entity/CDMA/requirements.txt
@@ -37,7 +37,7 @@ pbr==5.1.3
 pickleshare==0.7.5
 prometheus-client==0.6.0
 prompt-toolkit==1.0.16
-protobuf==3.7.1
+protobuf==3.18.3
 Pygments==2.3.1
 pyparsing==2.4.0
 pyrsistent==0.15.1