diff --git a/lib/tests/requirements-python2-dev.txt b/lib/tests/requirements-python2-dev.txt
index 3910619..c23b99c 100644
--- a/lib/tests/requirements-python2-dev.txt
+++ b/lib/tests/requirements-python2-dev.txt
@@ -1,4 +1,4 @@
-protobuf==3.17.3
+protobuf==5.29.6
 six==1.16
 pytest==4.6.11
 more_itertools>=5.0