diff --git a/entities/python/requirements.in b/entities/python/requirements.in
index 40e388c..075abf2 100644
--- a/entities/python/requirements.in
+++ b/entities/python/requirements.in
@@ -1 +1 @@
-protobuf==3.4.0
+protobuf==3.15.0
diff --git a/entities/python/requirements.txt b/entities/python/requirements.txt
index c2db902..18093f2 100644
--- a/entities/python/requirements.txt
+++ b/entities/python/requirements.txt
@@ -4,5 +4,7 @@
 #
 #    pip-compile --no-index --output-file requirements.txt requirements.in
 #
-protobuf==3.4.0
-six==1.10.0               # via protobuf
+protobuf==3.15.0
+    # via -r requirements.in
+six==1.10.0
+    # via protobuf