diff --git a/dockers/install/apt/Dockerfile b/dockers/install/apt/Dockerfile
index cd3ada4a..1a3122d9 100644
--- a/dockers/install/apt/Dockerfile
+++ b/dockers/install/apt/Dockerfile
@@ -1,4 +1,4 @@
-FROM ubuntu:22.04
+FROM ubuntu:26.04
 
 RUN apt-get -y update
 RUN apt-get -y install apt-transport-https curl
diff --git a/dockers/install/debian/Dockerfile b/dockers/install/debian/Dockerfile
index 1e50a33e..475b9691 100644
--- a/dockers/install/debian/Dockerfile
+++ b/dockers/install/debian/Dockerfile
@@ -1,4 +1,4 @@
-ARG VERS=20.04
+ARG VERS=26.04
 FROM ubuntu:${VERS}
 ARG JDK=openjdk-8-jdk
 RUN apt-get update
diff --git a/dockers/signing/Dockerfile b/dockers/signing/Dockerfile
index 3b5d862c..36501dc5 100644
--- a/dockers/signing/Dockerfile
+++ b/dockers/signing/Dockerfile
@@ -1,4 +1,4 @@
-FROM ubuntu:20.04
+FROM ubuntu:26.04
 
 VOLUME /data
 
diff --git a/dockers/verifydeb/Dockerfile b/dockers/verifydeb/Dockerfile
index 60c85cc7..b015f8cb 100644
--- a/dockers/verifydeb/Dockerfile
+++ b/dockers/verifydeb/Dockerfile
@@ -1,4 +1,4 @@
-FROM ubuntu:22.04
+FROM ubuntu:26.04
 ARG DEBIAN_FRONTEND=noninteractive
 RUN apt-get update -y && apt-get -y install dpkg-sig