diff --git a/machine-learning/malaria-classification/requirements.txt b/machine-learning/malaria-classification/requirements.txt
index a27d0356..f97fcb16 100644
--- a/machine-learning/malaria-classification/requirements.txt
+++ b/machine-learning/malaria-classification/requirements.txt
@@ -2,4 +2,5 @@ tensorflow
 sklearn
 numpy
 matplotlib
-opencv-python
\ No newline at end of file
+opencv-python
+protobuf>=6.33.5 # not directly required, pinned by Snyk to avoid a vulnerability
\ No newline at end of file