diff --git a/cover/requirements.txt b/cover/requirements.txt
index 1a01ec3..6181377 100644
--- a/cover/requirements.txt
+++ b/cover/requirements.txt
@@ -56,7 +56,7 @@ pexpect==4.6.0
 pickleshare==0.7.5
 prometheus-client==0.4.2
 prompt-toolkit==2.0.6
-protobuf==3.6.1
+protobuf==3.18.3
 psycopg2==2.7.5
 psycopg2-binary==2.7.5
 ptyprocess==0.6.0
diff --git a/requirements.txt b/requirements.txt
index e5a08f0..3bba9a8 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -59,7 +59,7 @@ pexpect==4.6.0
 pickleshare==0.7.5
 prometheus-client==0.4.2
 prompt-toolkit==2.0.6
-protobuf==3.6.1
+protobuf==3.18.3
 psycopg2==2.7.5
 psycopg2-binary==2.7.5
 ptyprocess==0.6.0