diff --git a/.github/workflows/common.yml b/.github/workflows/common.yml
index 8b6e36b..7df889d 100644
--- a/.github/workflows/common.yml
+++ b/.github/workflows/common.yml
@@ -33,15 +33,9 @@ jobs:
           - image: fedora-40
             dockerfile: fedora.dockerfile
 
-          - image: centos-9
-            dockerfile: fedora.dockerfile
-
           - image: debian-12
             dockerfile: debian.dockerfile
 
-          - image: ubuntu-22.04
-            dockerfile: debian.dockerfile
-
           - image: ubuntu-23.10
             dockerfile: debian.dockerfile
 
@@ -54,9 +48,6 @@ jobs:
           - image: opensuse-tumbleweed
             dockerfile: suse.dockerfile
 
-          - image: opensuse-leap-15.5
-            dockerfile: suse.dockerfile
-
           - image: opensuse-leap-15.6
             dockerfile: suse.dockerfile
 
diff --git a/debian.dockerfile b/debian.dockerfile
index 926a6dd..273f220 100644
--- a/debian.dockerfile
+++ b/debian.dockerfile
@@ -1,7 +1,6 @@
 ARG base_image=ubuntu-24.04
 
 FROM debian:12@sha256:1aadfee8d292f64b045adb830f8a58bfacc15789ae5f489a0fedcd517a862cb9 AS debian-12
-FROM ubuntu:22.04@sha256:6d7b5d3317a71adb5e175640150e44b8b9a9401a7dd394f44840626aff9fa94d AS ubuntu-22.04
 FROM ubuntu:23.10@sha256:bfae41cea51761ae450db6080b586a8c35334c756b511c06b393ae565a34cab4 AS ubuntu-23.10
 FROM ubuntu:24.04@sha256:562456a05a0dbd62a671c1854868862a4687bf979a96d48ae8e766642cd911e8 AS ubuntu-24.04
 
diff --git a/fedora.dockerfile b/fedora.dockerfile
index 695d0d9..367dffe 100644
--- a/fedora.dockerfile
+++ b/fedora.dockerfile
@@ -3,12 +3,10 @@ ARG base_image=fedora-40
 FROM registry.fedoraproject.org/fedora:38@sha256:6349d2df6b4322c5690df1bb7743c45c356e20471dda69f27218cd9ba4a6c3c7 AS fedora-38
 FROM registry.fedoraproject.org/fedora:39@sha256:2423c8f6171fff40d86e4d93610585b0906cd063d9488d89cbe76517540f7c33 AS fedora-39
 FROM registry.fedoraproject.org/fedora:40@sha256:9870a116ac770429d424f6e03d44ab9d57062ae6b20b8c1283a19aa2bd985f88 AS fedora-40
-FROM quay.io/centos/centos:stream9@sha256:9aff9c6de7b4eb3618a73f7b4fc203318d512538d7b7f25966c855d46225bd23 AS centos-9
 
 FROM ${base_image}
 
-RUN if grep -i centos /etc/os-release; then dnf install -y epel-release --nodocs --setopt install_weak_deps=False; fi && \
-    dnf install -y gnome-session-xsession gnome-extensions-app gjs gdm vte291 \
+RUN dnf install -y gnome-session-xsession gnome-extensions-app gjs gdm vte291 \
                    xorg-x11-server-Xvfb mesa-dri-drivers wl-clipboard \
                    PackageKit PackageKit-glib libhandy \
                    --nodocs --setopt install_weak_deps=False && dnf clean all -y
diff --git a/suse.dockerfile b/suse.dockerfile
index db7741a..6baa189 100644
--- a/suse.dockerfile
+++ b/suse.dockerfile
@@ -1,7 +1,6 @@
 ARG base_image=opensuse-tumbleweed
 
 FROM opensuse/tumbleweed:latest@sha256:15c379af6fef707cb6274be8e683bb0e184f8cae99e269be146416fa32f78793 AS opensuse-tumbleweed
-FROM opensuse/leap:15.5@sha256:165b2a35380bf408b0939c4198e5b013e9a2db5ccd173fcb82429204b8b2e61a AS opensuse-leap-15.5
 FROM opensuse/leap:15.6@sha256:8b764b0497b17a85ef5ac8f388ead8449d4e334e8a741d6529c45be2e14d66e5 AS opensuse-leap-15.6
 
 FROM ${base_image}