diff --git a/requirements.txt b/requirements.txt
index dbe063ab..418b383f 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -10,4 +10,5 @@ streamlit
 geos
 numba
 watchdog
-pvlib
\ No newline at end of file
+pvlib
+protobuf>=6.33.5 # not directly required, pinned by Snyk to avoid a vulnerability
\ No newline at end of file