diff --git a/testing/centos7-oj11/Dockerfile b/testing/centos7-oj11/Dockerfile
index 2c5a203b..80d6d684 100644
--- a/testing/centos7-oj11/Dockerfile
+++ b/testing/centos7-oj11/Dockerfile
@@ -17,6 +17,7 @@ COPY ./files /
 # Install Java and presto-admin dependences
 RUN \
     set -xeu && \
+    yum update -y && \
     yum install -y \
         nc \
         wget \
diff --git a/testing/centos7-oj17/Dockerfile b/testing/centos7-oj17/Dockerfile
index d9fbec6a..a3d06430 100644
--- a/testing/centos7-oj17/Dockerfile
+++ b/testing/centos7-oj17/Dockerfile
@@ -17,6 +17,7 @@ COPY ./files /
 # Install Java and presto-admin dependences
 RUN \
     set -xeu && \
+    yum update -y && \
     yum install -y \
         nc \
         wget \