diff --git a/Dockerfile b/Dockerfile
index b1c9d77..42c50e0 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM library/tomcat:7-jre8
+FROM library/tomcat:9-jre8
 
 ENV ARCH=amd64 \
   GUAC_VER=0.9.14 \
diff --git a/Dockerfile.raspberry-pi b/Dockerfile.raspberry-pi
index 744ae88..9d254cb 100644
--- a/Dockerfile.raspberry-pi
+++ b/Dockerfile.raspberry-pi
@@ -1,4 +1,4 @@
-FROM arm32v5/tomcat:7-jre8
+FROM arm32v5/tomcat:9-jre8
 
 ENV ARCH=armhf \
   GUAC_VER=0.9.14 \