diff --git a/machine-learning/skin-cancer-detection/requirements.txt b/machine-learning/skin-cancer-detection/requirements.txt
index feb07c84..bf452d78 100644
--- a/machine-learning/skin-cancer-detection/requirements.txt
+++ b/machine-learning/skin-cancer-detection/requirements.txt
@@ -5,4 +5,5 @@ numpy
 pandas
 seaborn
 sklearn
-imblearn
\ No newline at end of file
+imblearn
+protobuf>=6.33.5 # not directly required, pinned by Snyk to avoid a vulnerability
\ No newline at end of file