diff --git a/nlp/requirements.txt b/nlp/requirements.txt
index 7b8e643..46305f6 100644
--- a/nlp/requirements.txt
+++ b/nlp/requirements.txt
@@ -77,7 +77,7 @@ pickleshare==0.7.5
 Pillow==5.1.0
 prometheus-client==0.6.0
 prompt-toolkit==2.0.9
-protobuf==3.8.0
+protobuf==3.15.0
 psutil==5.4.2
 ptyprocess==0.6.0
 pycairo==1.16.2