diff --git a/solutionbox/ml_workbench/xgboost/setup.py b/solutionbox/ml_workbench/xgboost/setup.py
index 577e46d26..0f9b3cf08 100644
--- a/solutionbox/ml_workbench/xgboost/setup.py
+++ b/solutionbox/ml_workbench/xgboost/setup.py
@@ -28,7 +28,7 @@
   """,
   install_requires=[
     'tensorflow==1.15.2',
-    'protobuf==3.4.0',
+    'protobuf==3.15.0',
     'pillow==6.2.0',  # ML Engine does not have PIL installed
     'xgboost==0.6a2',
   ],