diff --git a/docker/Dockerfile b/docker/Dockerfile
index 869a62f..2200839 100644
--- a/docker/Dockerfile
+++ b/docker/Dockerfile
@@ -8,7 +8,7 @@
 # RUN:
 #   docker run -e VMPOOLER_CONFIG -p 80:4567 -it vmpooler
 
-FROM jruby:9.4.1.0-jdk11
+FROM jruby:9.4.2.0-jdk11
 
 LABEL org.opencontainers.image.description "VMPooler plus all known providers"
 
diff --git a/docker/Dockerfile.local b/docker/Dockerfile.local
index 76590cf..f468d6e 100644
--- a/docker/Dockerfile.local
+++ b/docker/Dockerfile.local
@@ -9,7 +9,7 @@
 # Then change directory into vmpooler-projects and build with: 
 
 
-FROM jruby:9.4.1.0-jdk11
+FROM jruby:9.4.2.0-jdk11
 
 LABEL org.opencontainers.image.description "VMPooler plus all known providers"