diff --git a/requirements.txt b/requirements.txt
index 60b5a1ba0..728eeb44e 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -5,7 +5,7 @@ colorama==0.3.7
 pylint==2.3.1
 jmespath==0.9.3
 numpy==1.14.5
-protobuf==3.6.1
+protobuf==4.25.8
 pyasn1==0.4.2
 s3transfer==0.1.13
 tensorflow==1.13.1
@@ -17,3 +17,4 @@ pytest==4.2.0
 pytest-xdist==1.26.1
 nose==1.3.7
 pyyaml==5.1
+urllib3>=2.5.0 # not directly required, pinned by Snyk to avoid a vulnerability