diff --git a/.github/workflows/runtime.yml b/.github/workflows/runtime.yml
index 90dac9751..1231c6acd 100644
--- a/.github/workflows/runtime.yml
+++ b/.github/workflows/runtime.yml
@@ -158,51 +158,21 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        otp: ['23.0', '25', '26', '27']
-        elixir: ['1.13', '1.15', '1.16', '1.17']
-        exclude:
-        - otp: '23.0'
-          elixir: '1.15'
-        - otp: '23.0'
-          elixir: '1.16'
-        - otp: '23.0'
-          elixir: '1.17'
-        - otp: '26'
-          elixir: '1.13'
-        - otp: '27'
-          elixir: '1.13'
-        - otp: '27'
-          elixir: '1.15'
-        - otp: '27'
-          elixir: '1.16'
-    runs-on: ubuntu-20.04
+        elixir: ['1.13', '1.14', '1.15', '1.16', '1.17']
+    runs-on: ubuntu-24.04
+    container:
+      image: elixir:${{ matrix.elixir }}
 
     steps:
 
     - uses: actions/checkout@v4
 
-    - name: Get specific Erlang/OTP
-      uses: erlef/setup-beam@v1
-      with:
-        otp-version: ${{matrix.otp}}
-        elixir-version: ${{matrix.elixir}}
-
-    - name: Get compatible Rebar binaries
-      if: matrix.otp < 24
-      run: |
-        rm rebar
-        rm rebar3
-        wget https://github.com/processone/ejabberd/raw/21.12/rebar
-        wget https://github.com/processone/ejabberd/raw/21.12/rebar3
-        chmod +x rebar
-        chmod +x rebar3
-
     - name: Prepare libraries
       run: |
-        sudo apt-get -qq update
-        sudo apt-get -y purge libgd3 nginx
-        sudo apt-get -qq install libexpat1-dev libgd-dev libpam0g-dev \
-                                 libsqlite3-dev libwebp-dev libyaml-dev
+        apt-get -qq update
+        apt-get -y purge libgd3 nginx
+        apt-get -qq install libexpat1-dev libgd-dev libpam0g-dev \
+                            libsqlite3-dev libwebp-dev libyaml-dev
 
     - name: Enable ModPresenceDemo and an Elixir dependency
       run: |
@@ -216,7 +186,13 @@ jobs:
       with:
         path: |
           ~/.cache/rebar3/
-        key: ${{matrix.otp}}-${{hashFiles('rebar.config')}}
+        key: ${{matrix.elixir}}-${{hashFiles('rebar.config')}}
+
+    - name: Install Hex and Rebar3 manually on older Elixir
+      if: matrix.elixir <= '1.14'
+      run: |
+        mix local.hex --force
+        mix local.rebar --force
 
     - name: Compile
       run: |
@@ -305,41 +281,21 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        otp: ['23.0', '25', '26', '27']
-        elixir: ['1.13', '1.15', '1.16', '1.17']
-        exclude:
-        - otp: '23.0'
-          elixir: '1.15'
-        - otp: '23.0'
-          elixir: '1.16'
-        - otp: '23.0'
-          elixir: '1.17'
-        - otp: '26'
-          elixir: '1.13'
-        - otp: '27'
-          elixir: '1.13'
-        - otp: '27'
-          elixir: '1.15'
-        - otp: '27'
-          elixir: '1.16'
-    runs-on: ubuntu-20.04
+        elixir: ['1.13', '1.14', '1.15', '1.16', '1.17']
+    runs-on: ubuntu-24.04
+    container:
+      image: elixir:${{ matrix.elixir }}
 
     steps:
 
     - uses: actions/checkout@v4
 
-    - name: Get specific Erlang/OTP
-      uses: erlef/setup-beam@v1
-      with:
-        otp-version: ${{matrix.otp}}
-        elixir-version: ${{matrix.elixir}}
-
     - name: Prepare libraries
       run: |
-        sudo apt-get -qq update
-        sudo apt-get -y purge libgd3 nginx
-        sudo apt-get -qq install libexpat1-dev libgd-dev libpam0g-dev \
-                                 libsqlite3-dev libwebp-dev libyaml-dev
+        apt-get -qq update
+        apt-get -y purge libgd3 nginx
+        apt-get -qq install libexpat1-dev libgd-dev libpam0g-dev \
+                            libsqlite3-dev libwebp-dev libyaml-dev
 
     - name: Remove Elixir Matchers
       run: |
@@ -356,17 +312,18 @@ jobs:
         sed -i 's|^{deps, \(.*\)|{deps, \1\n  {decimal, ".*", {git, "https://github.com/ericmj/decimal", {branch, "main"}}}, |g' rebar.config
         cat rebar.config
 
-    - name: Unlock Jose dependency on older Erlang
-      if: matrix.otp < 24
-      run: |
-        mix deps.unlock jose
-
     - name: Cache Hex.pm
       uses: actions/cache@v4
       with:
         path: |
           ~/.hex/
-        key: ${{matrix.otp}}-${{hashFiles('mix.exs')}}
+        key: ${{matrix.elixir}}-${{hashFiles('mix.exs')}}
+
+    - name: Install Hex and Rebar3 manually on older Elixir
+      if: matrix.elixir <= '1.14'
+      run: |
+        mix local.hex --force
+        mix local.rebar --force
 
     - name: Compile
       run: |