diff --git a/context_annotations/requirements-freeze.txt b/context_annotations/requirements-freeze.txt
index 6432f33..29d95fd 100644
--- a/context_annotations/requirements-freeze.txt
+++ b/context_annotations/requirements-freeze.txt
@@ -48,7 +48,7 @@ patsy==0.5.1
 pexpect==4.7.0
 pickleshare==0.7.5
 prompt-toolkit==3.0.2
-protobuf==3.11.2
+protobuf==3.18.3
 ptyprocess==0.6.0
 pycosat==0.6.3
 pycparser==2.19