diff --git a/.github/workflows/ci-build-test-fast.yml b/.github/workflows/ci-build-test-fast.yml
index 93c78128..1be24555 100644
--- a/.github/workflows/ci-build-test-fast.yml
+++ b/.github/workflows/ci-build-test-fast.yml
@@ -30,12 +30,12 @@ jobs:
     steps:
       - name: CI Leap 15.3
         run: sudo docker run kdave/ci-opensuse-leap-15.3-x86_64 ./test-build $GITHUB_REF_NAME --disable-documentation --disable-zoned
-  check-leap154:
-    name: CI Leap 15.4
+  check-leap156:
+    name: CI Leap 15.6
     runs-on: ubuntu-24.04
     steps:
-      - name: CI Leap 15.4
-        run: sudo docker run kdave/ci-opensuse-leap-15.4-x86_64 ./test-build $GITHUB_REF_NAME --disable-documentation --disable-zoned
+      - name: CI Leap 15.6
+        run: sudo docker run kdave/ci-opensuse-leap-15.6-x86_64 ./test-build $GITHUB_REF_NAME --disable-documentation --disable-zoned
   check-musl:
     name: CI Musl
     runs-on: ubuntu-24.04
diff --git a/.github/workflows/ci-build-test.yml b/.github/workflows/ci-build-test.yml
index e0bb7aad..c15d6441 100644
--- a/.github/workflows/ci-build-test.yml
+++ b/.github/workflows/ci-build-test.yml
@@ -31,13 +31,13 @@ jobs:
       - uses: actions/checkout@v4
       - name: CI Leap 15.3
         run: ci/ci-build-leap153
-  check-leap154:
-    name: CI Leap 15.4
+  check-leap156:
+    name: CI Leap 15.6
     runs-on: ubuntu-24.04
     steps:
       - uses: actions/checkout@v4
-      - name: CI Leap 15.4
-        run: ci/ci-build-leap154
+      - name: CI Leap 15.6
+        run: ci/ci-build-leap156
   check-musl:
     name: CI Musl
     runs-on: ubuntu-24.04
diff --git a/ci/ci-build-leap154 b/ci/ci-build-leap156
similarity index 91%
rename from ci/ci-build-leap154
rename to ci/ci-build-leap156
index 3f54a5e3..2dbdfc59 100755
--- a/ci/ci-build-leap154
+++ b/ci/ci-build-leap156
@@ -1,6 +1,6 @@
 #!/bin/sh
 # Usage: $0 [branch] [configure options]
-# Create source tarball from HEAD or given branch and build it in openSUSE Leap 15.4 CI
+# Create source tarball from HEAD or given branch and build it in openSUSE Leap 15.6 CI
 # environment. Configure options follow branch name that can be empty.
 
 HERE=`pwd`
@@ -14,7 +14,7 @@ else
 	exit 1
 fi
 
-CIIMAGEDIR=ci/images/ci-openSUSE-Leap-15.4-x86_64
+CIIMAGEDIR=ci/images/ci-openSUSE-Leap-15.6-x86_64
 BRANCH=${1:-HEAD}
 if [ "$#" -ge 1 ]; then
 	shift
diff --git a/ci/images/ci-openSUSE-Leap-15.4-x86_64/Dockerfile b/ci/images/ci-openSUSE-Leap-15.6-x86_64/Dockerfile
similarity index 98%
rename from ci/images/ci-openSUSE-Leap-15.4-x86_64/Dockerfile
rename to ci/images/ci-openSUSE-Leap-15.6-x86_64/Dockerfile
index f657cf18..df8af246 100644
--- a/ci/images/ci-openSUSE-Leap-15.4-x86_64/Dockerfile
+++ b/ci/images/ci-openSUSE-Leap-15.6-x86_64/Dockerfile
@@ -1,4 +1,4 @@
-FROM opensuse/leap:15.4
+FROM opensuse/leap:15.6
 
 WORKDIR /tmp
 
diff --git a/ci/images/ci-openSUSE-Leap-15.4-x86_64/docker-build b/ci/images/ci-openSUSE-Leap-15.6-x86_64/docker-build
similarity index 100%
rename from ci/images/ci-openSUSE-Leap-15.4-x86_64/docker-build
rename to ci/images/ci-openSUSE-Leap-15.6-x86_64/docker-build
diff --git a/ci/images/ci-openSUSE-Leap-15.4-x86_64/docker-run b/ci/images/ci-openSUSE-Leap-15.6-x86_64/docker-run
similarity index 100%
rename from ci/images/ci-openSUSE-Leap-15.4-x86_64/docker-run
rename to ci/images/ci-openSUSE-Leap-15.6-x86_64/docker-run
diff --git a/ci/images/ci-openSUSE-Leap-15.4-x86_64/run-tests b/ci/images/ci-openSUSE-Leap-15.6-x86_64/run-tests
similarity index 100%
rename from ci/images/ci-openSUSE-Leap-15.4-x86_64/run-tests
rename to ci/images/ci-openSUSE-Leap-15.6-x86_64/run-tests
diff --git a/ci/images/ci-openSUSE-Leap-15.4-x86_64/test-build b/ci/images/ci-openSUSE-Leap-15.6-x86_64/test-build
similarity index 100%
rename from ci/images/ci-openSUSE-Leap-15.4-x86_64/test-build
rename to ci/images/ci-openSUSE-Leap-15.6-x86_64/test-build