diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 78eed44..1b04b67 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -7,9 +7,9 @@ permissions:
 
 jobs:
   fmt:
-    runs-on: ubuntu-22.04
+    runs-on: ubuntu-24.04
     steps:
-      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+      - uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v6.0.0
       - name: Prepare
         run: |
           sudo apt update
@@ -17,8 +17,8 @@ jobs:
       - name: Install Erlang/OTP
         uses: erlef/setup-beam@e6d7c94229049569db56a7ad5a540c051a010af9 # v1.20.4
         with:
-          otp-version: '26.2.4'
-          rebar3-version: '3.23.0'
+          otp-version: '28.1.1'
+          rebar3-version: '3.25.1'
       - name: erlang-formatter
         run: |
           rebar3 as check fmt
@@ -33,7 +33,7 @@ jobs:
   spellcheck:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+      - uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v6.0.0
       - name: Install typos
         uses: taiki-e/install-action@14083e64ac8cf1f5e54356df00b9779b23e192a1 # v2.58.29
         with:
@@ -42,23 +42,22 @@ jobs:
         run: typos --config=.github/typos.toml
 
   build:
-    runs-on: ubuntu-22.04
+    runs-on: ubuntu-24.04
     strategy:
       fail-fast: false
       matrix:
         include:
-          - otp-version: '27.1.2'
-          - otp-version: '26.2.5.5'
-          - otp-version: '25.3.2.15'
+          - otp-version: '28.1.1'
+          - otp-version: '27.3.4.6'
     steps:
-      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+      - uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v6.0.0
       - name: Install Erlang/OTP
         uses: erlef/setup-beam@e6d7c94229049569db56a7ad5a540c051a010af9 # v1.20.4
         with:
           otp-version: ${{ matrix.otp-version }}
-          rebar3-version: '3.23.0'
+          rebar3-version: '3.25.1'
       - name: Install packages for common tests
-        uses: awalsh128/cache-apt-pkgs-action@2c09a5e66da6c8016428a2172bd76e5e4f14bb17 # v1.5.3
+        uses: awalsh128/cache-apt-pkgs-action@acb598e5ddbc6f68a970c5da0688d2f3a9f04d05 # v1.6.0
         with:
           packages: redis-server faketime
           version: 1.0
@@ -69,4 +68,11 @@ jobs:
       - name: Run common tests
         run: rebar3 ct
       - name: Run dialyzer
-        run: rebar3 as test dialyzer
+        run: |
+          # Remove remnants from "rebar3 ct" that creates problems for the dialyzer.
+          # rebar3 might add ct_hooks that are not found by the dialyzer and will
+          # create warnings if not rebuilt. Example of a warning:
+          #   test/ered_cluster_SUITE.erl
+          #   Line 72 Column 13: Unknown function cthr:pal/1
+          rebar3 as test clean
+          rebar3 as test dialyzer
diff --git a/.github/workflows/db-compatibility.yml b/.github/workflows/db-compatibility.yml
index 764ee8b..75ccaf3 100644
--- a/.github/workflows/db-compatibility.yml
+++ b/.github/workflows/db-compatibility.yml
@@ -8,25 +8,27 @@ permissions:
 jobs:
   valkey:
     name: Valkey ${{ matrix.valkey-version }}
-    runs-on: ubuntu-22.04
+    runs-on: ubuntu-24.04
     strategy:
       fail-fast: false
       matrix:
         include:
-          - valkey-version: 8.0.1
-          - valkey-version: 7.2.5
+          - valkey-version: 9.0.0
+          - valkey-version: 8.1.4
+          - valkey-version: 8.0.6
+          - valkey-version: 7.2.11
     steps:
-      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+      - uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v6.0.0
       - name: Install redis-cli required by common tests
-        uses: awalsh128/cache-apt-pkgs-action@2c09a5e66da6c8016428a2172bd76e5e4f14bb17 # v1.5.3
+        uses: awalsh128/cache-apt-pkgs-action@acb598e5ddbc6f68a970c5da0688d2f3a9f04d05 # v1.6.0
         with:
           packages: redis-server
           version: 1.0
       - name: Install Erlang/OTP
         uses: erlef/setup-beam@e6d7c94229049569db56a7ad5a540c051a010af9 # v1.20.4
         with:
-          otp-version: '26.2.4'
-          rebar3-version: '3.23.0'
+          otp-version: '28.1.1'
+          rebar3-version: '3.25.1'
       - name: Build and run common tests
         env:
           SERVER_DOCKER_IMAGE: valkey/valkey:${{ matrix.valkey-version }}
@@ -35,7 +37,7 @@ jobs:
 
   redis:
     name: Redis ${{ matrix.redis-version }}
-    runs-on: ubuntu-22.04
+    runs-on: ubuntu-24.04
     strategy:
       fail-fast: false
       matrix:
@@ -44,17 +46,17 @@ jobs:
           - redis-version: 7.0.15
           - redis-version: 6.2.14
     steps:
-      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+      - uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v6.0.0
       - name: Install packages for common tests
-        uses: awalsh128/cache-apt-pkgs-action@2c09a5e66da6c8016428a2172bd76e5e4f14bb17 # v1.5.3
+        uses: awalsh128/cache-apt-pkgs-action@acb598e5ddbc6f68a970c5da0688d2f3a9f04d05 # v1.6.0
         with:
           packages: redis-server faketime
           version: 1.0
       - name: Install Erlang/OTP
         uses: erlef/setup-beam@e6d7c94229049569db56a7ad5a540c051a010af9 # v1.20.4
         with:
-          otp-version: '26.2.4'
-          rebar3-version: '3.23.0'
+          otp-version: '28.1.1'
+          rebar3-version: '3.25.1'
       - name: Build and run common tests
         env:
           SERVER_DOCKER_IMAGE: redis:${{ matrix.redis-version }}
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 5c73634..6806903 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -14,18 +14,22 @@ jobs:
     name: Check ered application version
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+      - uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v6.0.0
       - name: Install Erlang/OTP
         uses: erlef/setup-beam@e6d7c94229049569db56a7ad5a540c051a010af9 # v1.20.4
         with:
-          otp-version: '27.1.2'
-          rebar3-version: '3.23.0'
+          otp-version: '28.1.1'
+          rebar3-version: '3.25.1'
       - name: Check if vsn matches pushed tag (see src/ered.app.src).
         run: |
-          rebar3 shell --apps ered --eval "$(cat << EOF
+          rebar3 compile
+          erl -noshell -pa _build/default/lib/*/ebin -eval "$(cat <<'EOF'
           Version = "${{ github.ref_name }}",
+          application:start(ered),
           case application:get_key(ered, vsn) of
               {ok, Version} ->
+                  io:format(user, "Version check ok, vsn and pushed tag is ~p~n",
+                            [Version]),
                   halt(0,[]);
               Error ->
                   io:format(user, "Version check failed, got ~p while pushed tag is ~s~n",
diff --git a/rebar.config b/rebar.config
index d006643..f37d738 100644
--- a/rebar.config
+++ b/rebar.config
@@ -10,7 +10,4 @@
 
 {profiles, [{check, [{plugins, [{rebar3_fmt, "1.18.0"}]}]}]}.
 
-%% In OTP-26 the 'unknown function or type' warning is on by default.
-%% We disable this again due to missing supervisor types in OTP-26, see:
-%% https://github.com/erlang/otp/pull/6893
-{dialyzer, [{warnings, [no_unknown]}]}.
+{dialyzer, [{plt_extra_apps, [common_test, eunit, public_key]}]}.