diff --git a/.github/workflows/tests.yaml b/.github/workflows/tests.yaml
index f20df7a9..391fc2fc 100644
--- a/.github/workflows/tests.yaml
+++ b/.github/workflows/tests.yaml
@@ -24,27 +24,27 @@ jobs:
           - name: "Debian Testing"
             runner: ubuntu-latest
             container: debiantesting
-          - name: "Fedora 37"
+          - name: "Fedora 40"
             runner: ubuntu-latest
-            container: fedora37
-          - name: "Fedora 38"
+            container: fedora40
+          - name: "Fedora 41"
             runner: ubuntu-latest
-            container: fedora38
+            container: fedora41
           - name: "OpenSUSE Leap"
             runner: ubuntu-latest
             container: opensuseleap
           - name: "OpenSUSE Tumbleweed"
             runner: ubuntu-latest
             container: opensusetumbleweed
-          - name: "Ubuntu 18.04"
-            runner: ubuntu-latest
-            container: ubuntu1804
           - name: "Ubuntu 20.04"
             runner: ubuntu-latest
             container: ubuntu2004
           - name: "Ubuntu 22.04"
             runner: ubuntu-latest
             container: ubuntu2204
+          - name: "Ubuntu 24.04"
+            runner: ubuntu-latest
+            container: ubuntu2204
           - name: "macOS 13"
             runner: macos-13
             container: osx-13
diff --git a/docker-compose.yml b/docker-compose.yml
index e748fcfb..f4377def 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -1,4 +1,3 @@
-version: '3'
 services:
   test-alpine-edge:
     build:
@@ -48,18 +47,18 @@ services:
     security_opt:
       - label=type:container_runtime_t
     tty: true
-  test-fedora37:
+  test-fedora40:
     build:
       context: .
-      dockerfile: test/docker/fedora37
+      dockerfile: test/docker/fedora40
     network_mode: "host"
     security_opt:
       - label=type:container_runtime_t
     tty: true
-  test-fedora38:
+  test-fedora41:
     build:
       context: .
-      dockerfile: test/docker/fedora38
+      dockerfile: test/docker/fedora41
     network_mode: "host"
     security_opt:
       - label=type:container_runtime_t
@@ -80,14 +79,6 @@ services:
     security_opt:
       - label=type:container_runtime_t
     tty: true
-  test-ubuntu1804:
-    build:
-      context: .
-      dockerfile: test/docker/ubuntu1804
-    network_mode: "host"
-    security_opt:
-      - label=type:container_runtime_t
-    tty: true
   test-ubuntu2004:
     build:
       context: .
@@ -104,3 +95,11 @@ services:
     security_opt:
       - label=type:container_runtime_t
     tty: true
+  test-ubuntu2404:
+    build:
+      context: .
+      dockerfile: test/docker/ubuntu2404
+    network_mode: "host"
+    security_opt:
+      - label=type:container_runtime_t
+    tty: true
diff --git a/test/docker/alpine-edge b/test/docker/alpine-edge
index 3fca8559..71f37ab8 100644
--- a/test/docker/alpine-edge
+++ b/test/docker/alpine-edge
@@ -31,4 +31,4 @@ RUN make install
 WORKDIR /root/code/test/
 RUN make -j2
 
-CMD ["bash", "-c", "./run_all -v ; cat all.log | grep 'not ok' ; ./problems ; FAILED=$? ; echo timew $( timew --version ) ; python --version ; cmake --version ; gcc --version ; exit $FAILED"]
+CMD ["bash", "-c", "./run_all -v ; cat all.log | grep 'not ok' ; ./problems ; FAILED=$? ; echo timew $( timew --version ) ; python --version ; cmake --version ; gcc --version ; asciidoctor --version ; exit $FAILED"]
diff --git a/test/docker/alpine-latest b/test/docker/alpine-latest
index 26e41701..8faa8054 100644
--- a/test/docker/alpine-latest
+++ b/test/docker/alpine-latest
@@ -31,4 +31,4 @@ RUN make install
 WORKDIR /root/code/test/
 RUN make -j2
 
-CMD ["bash", "-c", "./run_all -v ; cat all.log | grep 'not ok' ; ./problems ; FAILED=$? ; echo timew $( timew --version ) ; python --version ; cmake --version ; gcc --version ; exit $FAILED"]
+CMD ["bash", "-c", "./run_all -v ; cat all.log | grep 'not ok' ; ./problems ; FAILED=$? ; echo timew $( timew --version ) ; python --version ; cmake --version ; gcc --version ; asciidoctor --version ; exit $FAILED"]
diff --git a/test/docker/archlinux b/test/docker/archlinux
index a6a8b879..6e11670c 100644
--- a/test/docker/archlinux
+++ b/test/docker/archlinux
@@ -32,4 +32,4 @@ RUN make install
 WORKDIR /root/code/test/
 RUN make -j2
 
-CMD ["bash", "-c", "./run_all -v ; cat all.log | grep 'not ok' ; ./problems ; FAILED=$? ; echo timew $( timew --version ) ; python --version ; cmake --version ; gcc --version ; exit $FAILED"]
+CMD ["bash", "-c", "./run_all -v ; cat all.log | grep 'not ok' ; ./problems ; FAILED=$? ; echo timew $( timew --version ) ; python --version ; cmake --version ; gcc --version ; asciidoctor --version ; exit $FAILED"]
diff --git a/test/docker/centos-stream9 b/test/docker/centos-stream9
index 3d9a6e7e..f0c9ffee 100644
--- a/test/docker/centos-stream9
+++ b/test/docker/centos-stream9
@@ -36,4 +36,4 @@ RUN make install
 WORKDIR /root/code/test/
 RUN make -j2
 
-CMD ["bash", "-c", "./run_all -v ; cat all.log | grep 'not ok' ; ./problems ; FAILED=$? ; echo timew $( timew --version ) ; python --version ; cmake --version ; gcc --version ; exit $FAILED"]
+CMD ["bash", "-c", "./run_all -v ; cat all.log | grep 'not ok' ; ./problems ; FAILED=$? ; echo timew $( timew --version ) ; python --version ; cmake --version ; gcc --version ; asciidoctor --version ; exit $FAILED"]
diff --git a/test/docker/debianstable b/test/docker/debianstable
index faa12f83..507e7ffc 100644
--- a/test/docker/debianstable
+++ b/test/docker/debianstable
@@ -38,4 +38,4 @@ RUN make install
 WORKDIR /root/code/test/
 RUN make -j2
 
-CMD ["bash", "-c", "./run_all -v ; cat all.log | grep 'not ok' ; ./problems ; FAILED=$? ; echo timew $( timew --version ) ; python --version ; cmake --version ; gcc --version ; exit $FAILED"]
+CMD ["bash", "-c", "./run_all -v ; cat all.log | grep 'not ok' ; ./problems ; FAILED=$? ; echo timew $( timew --version ) ; python --version ; cmake --version ; gcc --version ; asciidoctor --version ; exit $FAILED"]
diff --git a/test/docker/debiantesting b/test/docker/debiantesting
index ff8c6476..043e086e 100644
--- a/test/docker/debiantesting
+++ b/test/docker/debiantesting
@@ -40,4 +40,4 @@ RUN make install
 WORKDIR /root/code/test/
 RUN make -j2
 
-CMD ["bash", "-c", "./run_all -v ; cat all.log | grep 'not ok' ; ./problems ; FAILED=$? ; echo timew $( timew --version ) ; python --version ; cmake --version ; gcc --version ; exit $FAILED"]
+CMD ["bash", "-c", "./run_all -v ; cat all.log | grep 'not ok' ; ./problems ; FAILED=$? ; echo timew $( timew --version ) ; python --version ; cmake --version ; gcc --version ; asciidoctor --version ; exit $FAILED"]
diff --git a/test/docker/fedora37 b/test/docker/fedora40
similarity index 88%
rename from test/docker/fedora37
rename to test/docker/fedora40
index fc8fe763..3479e481 100644
--- a/test/docker/fedora37
+++ b/test/docker/fedora40
@@ -1,4 +1,4 @@
-FROM fedora:37
+FROM fedora:40
 
 RUN dnf update -y
 RUN dnf install -y \
@@ -31,4 +31,4 @@ RUN make install
 WORKDIR /root/code/test/
 RUN make -j2
 
-CMD ["bash", "-c", "./run_all -v ; cat all.log | grep 'not ok' ; ./problems ; FAILED=$? ; echo timew $( timew --version ) ; python --version ; cmake --version ; gcc --version ; exit $FAILED"]
+CMD ["bash", "-c", "./run_all -v ; cat all.log | grep 'not ok' ; ./problems ; FAILED=$? ; echo timew $( timew --version ) ; python --version ; cmake --version ; gcc --version ; asciidoctor --version ; exit $FAILED"]
diff --git a/test/docker/fedora38 b/test/docker/fedora41
similarity index 88%
rename from test/docker/fedora38
rename to test/docker/fedora41
index 88b88ef0..1f533b96 100644
--- a/test/docker/fedora38
+++ b/test/docker/fedora41
@@ -1,4 +1,4 @@
-FROM fedora:38
+FROM fedora:41
 
 RUN dnf update -y
 RUN dnf install -y \
@@ -31,4 +31,4 @@ RUN make install
 WORKDIR /root/code/test/
 RUN make -j2
 
-CMD ["bash", "-c", "./run_all -v ; cat all.log | grep 'not ok' ; ./problems ; FAILED=$? ; echo timew $( timew --version ) ; python --version ; cmake --version ; gcc --version ; exit $FAILED"]
+CMD ["bash", "-c", "./run_all -v ; cat all.log | grep 'not ok' ; ./problems ; FAILED=$? ; echo timew $( timew --version ) ; python --version ; cmake --version ; gcc --version ; asciidoctor --version ; exit $FAILED"]
diff --git a/test/docker/opensuseleap b/test/docker/opensuseleap
index 2dcedccb..97b8efe5 100644
--- a/test/docker/opensuseleap
+++ b/test/docker/opensuseleap
@@ -35,4 +35,4 @@ RUN make install
 WORKDIR /root/code/test/
 RUN make -j2
 
-CMD ["bash", "-c", "./run_all -v ; cat all.log | grep 'not ok' ; ./problems ; FAILED=$? ; echo timew $( timew --version ) ; python --version ; cmake --version ; gcc --version ; exit $FAILED"]
+CMD ["bash", "-c", "./run_all -v ; cat all.log | grep 'not ok' ; ./problems ; FAILED=$? ; echo timew $( timew --version ) ; python --version ; cmake --version ; gcc --version ; asciidoctor --version ; exit $FAILED"]
diff --git a/test/docker/opensusetumbleweed b/test/docker/opensusetumbleweed
index b153380e..6a5c126f 100644
--- a/test/docker/opensusetumbleweed
+++ b/test/docker/opensusetumbleweed
@@ -7,10 +7,9 @@ RUN zypper install -y \
            man \
            python3 \
            python3-python-dateutil \
-           ruby
+           ruby \
+           ruby3.4-rubygem-asciidoctor
 
-RUN gem install asciidoctor -v 2.0.17
-RUN update-alternatives --install /usr/bin/asciidoctor asciidoctor /usr/bin//asciidoctor.ruby3.3 10
 RUN update-alternatives --install /usr/bin/python python /usr/bin/python3 10
 ENV TZ=Europe/Berlin
 
@@ -33,4 +32,4 @@ RUN make install
 WORKDIR /root/code/test/
 RUN make -j2
 
-CMD ["bash", "-c", "./run_all -v ; cat all.log | grep 'not ok' ; ./problems ; FAILED=$? ; echo timew $( timew --version ) ; python --version ; cmake --version ; gcc --version ; exit $FAILED"]
+CMD ["bash", "-c", "./run_all -v ; cat all.log | grep 'not ok' ; ./problems ; FAILED=$? ; echo timew $( timew --version ) ; python --version ; cmake --version ; gcc --version ; asciidoctor --version ; exit $FAILED"]
diff --git a/test/docker/ubuntu2004 b/test/docker/ubuntu2004
index a1564514..680df589 100644
--- a/test/docker/ubuntu2004
+++ b/test/docker/ubuntu2004
@@ -39,4 +39,4 @@ RUN make install
 WORKDIR /root/code/test/
 RUN make -j2
 
-CMD ["bash", "-c", "./run_all -v ; cat all.log | grep 'not ok' ; ./problems ; FAILED=$? ; echo timew $( timew --version ) ; python --version ; cmake --version ; gcc --version ; exit $FAILED"]
+CMD ["bash", "-c", "./run_all -v ; cat all.log | grep 'not ok' ; ./problems ; FAILED=$? ; echo timew $( timew --version ) ; python --version ; cmake --version ; gcc --version ; asciidoctor --version ; exit $FAILED"]
diff --git a/test/docker/ubuntu2204 b/test/docker/ubuntu2204
index e05a35a4..338194e9 100644
--- a/test/docker/ubuntu2204
+++ b/test/docker/ubuntu2204
@@ -39,4 +39,4 @@ RUN make install
 WORKDIR /root/code/test/
 RUN make -j2
 
-CMD ["bash", "-c", "./run_all -v ; cat all.log | grep 'not ok' ; ./problems ; FAILED=$? ; echo timew $( timew --version ) ; python --version ; cmake --version ; gcc --version ; exit $FAILED"]
+CMD ["bash", "-c", "./run_all -v ; cat all.log | grep 'not ok' ; ./problems ; FAILED=$? ; echo timew $( timew --version ) ; python --version ; cmake --version ; gcc --version ; asciidoctor --version ; exit $FAILED"]
diff --git a/test/docker/ubuntu1804 b/test/docker/ubuntu2404
similarity index 88%
rename from test/docker/ubuntu1804
rename to test/docker/ubuntu2404
index dc6ad12c..94ae594f 100644
--- a/test/docker/ubuntu1804
+++ b/test/docker/ubuntu2404
@@ -1,4 +1,4 @@
-FROM ubuntu:18.04
+FROM ubuntu:24.04
 
 ENV DEBIAN_FRONTEND noninteractive
 
@@ -10,6 +10,7 @@ RUN apt-get install -y \
             git \
             locales \
             man \
+            man-db \
             python3 \
             python3-dateutil \
             tzdata
@@ -38,4 +39,4 @@ RUN make install
 WORKDIR /root/code/test/
 RUN make -j2
 
-CMD ["bash", "-c", "./run_all -v ; cat all.log | grep 'not ok' ; ./problems ; FAILED=$? ; echo timew $( timew --version ) ; python --version ; cmake --version ; gcc --version ; exit $FAILED"]
+CMD ["bash", "-c", "./run_all -v ; cat all.log | grep 'not ok' ; ./problems ; FAILED=$? ; echo timew $( timew --version ) ; python --version ; cmake --version ; gcc --version ; asciidoctor --version ; exit $FAILED"]