diff --git a/.github/workflows/linux.yml b/.github/workflows/linux.yml
index 3bcb5f89..d520330c 100644
--- a/.github/workflows/linux.yml
+++ b/.github/workflows/linux.yml
@@ -33,6 +33,10 @@ jobs:
         include:
 
           # ====== Ubuntu Linux =============================================
+          - label: "Ubuntu 24.04 (Noble Numbat) with GCC"
+            image: ubuntu:24.04
+            cc: gcc
+            cxx: g++
           - label: "Ubuntu 22.04 (Jammy Jellyfish) with GCC"
             image: ubuntu:22.04
             cc: gcc
@@ -41,10 +45,6 @@ jobs:
             image: ubuntu:20.04
             cc: gcc
             cxx: g++
-          - label: "Ubuntu 18.04 (Bionic Beaver) with GCC"
-            image: ubuntu:18.04
-            cc: gcc
-            cxx: g++
 
           # ====== Debian Linux =============================================
           - label: "Debian 12 (Bookworm) with GCC"
@@ -61,12 +61,8 @@ jobs:
             cxx: g++
 
           # ====== Fedora Linux =============================================
-          - label: "Fedora 39 with Clang"
-            image: fedora:35
-            cc: clang
-            cxx: clang++
-          - label: "Fedora 38 with Clang"
-            image: fedora:34
+          - label: "Fedora 40 with Clang"
+            image: fedora:40
             cc: clang
             cxx: clang++
 
@@ -78,7 +74,7 @@ jobs:
       image: ${{ matrix.image }}
     steps:
       # NOTE: actions/checkout@v4 does not work for old Ubuntu 18.04!
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Build
         shell: bash
         run: |
diff --git a/.github/workflows/multiarch.yml b/.github/workflows/multiarch.yml
index 305a6f0d..cc7d571e 100644
--- a/.github/workflows/multiarch.yml
+++ b/.github/workflows/multiarch.yml
@@ -33,19 +33,19 @@ jobs:
         include:
 
           # ====== Ubuntu Linux =============================================
-          - label: "Ubuntu 22.04 (Focal Fossa): Clang/ARMv8"
+          - label: "Ubuntu 24.04 (Focal Fossa): Clang/ARMv8"
             arch: aarch64
-            distro: ubuntu22.04
+            distro: ubuntu24.04
             cc: clang
             cxx: clang++
-          - label: "Ubuntu 22.04 (Focal Fossa): GCC/S390x"
+          - label: "Ubuntu 24.04 (Focal Fossa): GCC/S390x"
             arch: s390x
-            distro: ubuntu22.04
+            distro: ubuntu24.04
             cc: gcc
             cxx: g++
-          - label: "Ubuntu 22.04 (Focal Fossa): GCC/RISC-V"
+          - label: "Ubuntu 24.04 (Focal Fossa): GCC/RISC-V"
             arch: riscv64
-            distro: ubuntu22.04
+            distro: ubuntu24.04
             cc: gcc
             cxx: g++
 
@@ -62,9 +62,9 @@ jobs:
             cxx: clang++
 
           # ====== Fedora Linux =============================================
-          - label: "Fedora 39: GCC/PPC64"
+          - label: "Fedora 40: GCC/PPC64"
             arch: ppc64le
-            distro: fedora39
+            distro: fedora40
             cc: gcc
             cxx: g++
 
diff --git a/.github/workflows/packaging.yml b/.github/workflows/packaging.yml
index fdfe441e..35087953 100644
--- a/.github/workflows/packaging.yml
+++ b/.github/workflows/packaging.yml
@@ -23,6 +23,7 @@ on:
     branches:
       - master
       - dreibh/github-actions
+      - dreibh/udpping
 
 jobs:
   # ====== Ubuntu Linux =====================================================