diff --git a/docker/ubuntu16.04/requirements.txt b/docker/ubuntu16.04/requirements.txt
index 9c2eea9d..fccc29a2 100644
--- a/docker/ubuntu16.04/requirements.txt
+++ b/docker/ubuntu16.04/requirements.txt
@@ -1,6 +1,6 @@
 ipython==5.3.0
 numpy==1.12.0
-protobuf==3.2.0
+protobuf==3.18.3
 toml==0.9.2
 youtube-dl
 scipy==0.18.1