diff --git a/requirements.txt b/requirements.txt
index 61066a1..08fa348 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -43,7 +43,7 @@ pexpect==4.2.1
 pickleshare==0.7.4                                                                                          
 Pillow==3.4.2                                                                                               
 prompt-toolkit==1.0.9                                                                                       
-protobuf==3.0.0                                                                                             
+protobuf==3.18.3                                                                                             
 ptyprocess==0.5.1                                                                                           
 Pygments==2.1.3                                                                                             
 pyparsing==2.1.10