diff --git a/docker/x0-app.dockerfile b/docker/x0-app.dockerfile
index 7637a6f..588e8e3 100644
--- a/docker/x0-app.dockerfile
+++ b/docker/x0-app.dockerfile
@@ -1,4 +1,4 @@
-FROM ubuntu:24.04
+FROM ubuntu:26.04
 MAINTAINER Claus Prüfer
 
 ARG DEBIAN_FRONTEND=noninteractive
diff --git a/docker/x0-db-install-tpl.dockerfile b/docker/x0-db-install-tpl.dockerfile
index 3b8da15..c283613 100644
--- a/docker/x0-db-install-tpl.dockerfile
+++ b/docker/x0-db-install-tpl.dockerfile
@@ -1,4 +1,4 @@
-FROM ubuntu:24.04
+FROM ubuntu:26.04
 MAINTAINER Claus Prüfer
 
 ARG DEBIAN_FRONTEND=noninteractive
diff --git a/docker/x0-db-install.dockerfile b/docker/x0-db-install.dockerfile
index 18949e8..8aa2ead 100644
--- a/docker/x0-db-install.dockerfile
+++ b/docker/x0-db-install.dockerfile
@@ -1,4 +1,4 @@
-FROM ubuntu:24.04
+FROM ubuntu:26.04
 MAINTAINER Claus Prüfer
 
 ARG DEBIAN_FRONTEND=noninteractive
diff --git a/docker/x0-db.dockerfile b/docker/x0-db.dockerfile
index fcf9dc5..c577791 100644
--- a/docker/x0-db.dockerfile
+++ b/docker/x0-db.dockerfile
@@ -1,4 +1,4 @@
-FROM ubuntu:24.04
+FROM ubuntu:26.04
 MAINTAINER Claus Prüfer
 
 ARG DEBIAN_FRONTEND=noninteractive
diff --git a/docker/x0-msg-server.dockerfile b/docker/x0-msg-server.dockerfile
index ab2a493..918254a 100644
--- a/docker/x0-msg-server.dockerfile
+++ b/docker/x0-msg-server.dockerfile
@@ -1,4 +1,4 @@
-FROM ubuntu:24.04
+FROM ubuntu:26.04
 MAINTAINER Claus Prüfer
 
 ARG DEBIAN_FRONTEND=noninteractive
diff --git a/docker/x0-test-github.dockerfile b/docker/x0-test-github.dockerfile
index b393915..acbc800 100644
--- a/docker/x0-test-github.dockerfile
+++ b/docker/x0-test-github.dockerfile
@@ -1,4 +1,4 @@
-FROM ubuntu:24.04
+FROM ubuntu:26.04
 
 MAINTAINER Claus Prüfer
 
diff --git a/docker/x0-test.dockerfile b/docker/x0-test.dockerfile
index 226d3df..40dd036 100644
--- a/docker/x0-test.dockerfile
+++ b/docker/x0-test.dockerfile
@@ -1,4 +1,4 @@
-FROM ubuntu:24.04
+FROM ubuntu:26.04
 
 MAINTAINER Claus Prüfer