diff --git a/dev_requirements.txt b/dev_requirements.txt
index 09f09f1c..e068af71 100644
--- a/dev_requirements.txt
+++ b/dev_requirements.txt
@@ -19,3 +19,4 @@ python-vagrant>=0.5.15
 pytest
 git+https://github.com/couchbaselabs/sphinx-autodoc-typehints.git; python_version>='3.0'
 git+https://github.com/couchbaselabs/mypy.git@stub-merge; python_version>'3.10'
+protobuf>=4.25.8 # not directly required, pinned by Snyk to avoid a vulnerability