diff --git a/services/rcnn/requirements-missingcaffe.txt b/services/rcnn/requirements-missingcaffe.txt
index 796d3b37..ccdcc394 100644
--- a/services/rcnn/requirements-missingcaffe.txt
+++ b/services/rcnn/requirements-missingcaffe.txt
@@ -18,7 +18,7 @@ networkx==2.1
 numpy==1.14.5
 opencv-python==3.4.1.15
 Pillow==5.1.0
-protobuf==3.6.0
+protobuf==3.15.0
 pyparsing==2.2.0
 python-dateutil==2.7.3
 pytz==2018.4
diff --git a/services/rcnn/requirements-old.txt b/services/rcnn/requirements-old.txt
index 796d3b37..ccdcc394 100644
--- a/services/rcnn/requirements-old.txt
+++ b/services/rcnn/requirements-old.txt
@@ -18,7 +18,7 @@ networkx==2.1
 numpy==1.14.5
 opencv-python==3.4.1.15
 Pillow==5.1.0
-protobuf==3.6.0
+protobuf==3.15.0
 pyparsing==2.2.0
 python-dateutil==2.7.3
 pytz==2018.4