diff --git a/.github/workflows/dockerbuild.yml b/.github/workflows/dockerbuild.yml
index 7530d63afc..592bcf81e7 100644
--- a/.github/workflows/dockerbuild.yml
+++ b/.github/workflows/dockerbuild.yml
@@ -36,7 +36,7 @@ jobs:
           echo "FORCE_YES=--force-yes" >> ${GITHUB_ENV}
           echo "APT_REPO=cloudfront.debian.net/debian-archive" >> ${GITHUB_ENV}
           echo "APT_SECURITY_REPO=cloudfront.debian.net/debian-archive/debian-security" >> ${GITHUB_ENV}
-      - if: ${{ matrix.php == 5.5 || matrix.php == 5.6 }}
+      - if: ${{ matrix.php == 5.5 }}
         run: |
           echo "GD_OPTIONS=--with-freetype-dir=/usr/include --with-jpeg-dir=/usr/include" >> ${GITHUB_ENV}
           echo "EXT_INSTALL_ARGS=gd zip mysqli pgsql opcache" >> ${GITHUB_ENV}
@@ -44,6 +44,14 @@ jobs:
           echo "FORCE_YES=--force-yes" >>  ${GITHUB_ENV}
           echo "APT_REPO=cloudfront.debian.net/debian-archive" >> ${GITHUB_ENV}
           echo "APT_SECURITY_REPO=cloudfront.debian.net/debian-archive/debian-security" >> ${GITHUB_ENV}
+      - if: ${{ matrix.php == 5.6 }}
+        run: |
+          echo "GD_OPTIONS=--with-freetype-dir=/usr/include --with-jpeg-dir=/usr/include" >> ${GITHUB_ENV}
+          echo "EXT_INSTALL_ARGS=gd zip mysqli pgsql opcache" >> ${GITHUB_ENV}
+          echo "APCU=" >>  ${GITHUB_ENV}
+          echo "FORCE_YES=--force-yes" >>  ${GITHUB_ENV}
+          echo "APT_REPO=cloudfront.debian.net/debian-archive" >> ${GITHUB_ENV}
+          echo "APT_SECURITY_REPO=cloudfront.debian.net/debian-archive" >> ${GITHUB_ENV}
       - if: ${{ matrix.php == 7.0 }}
         run: |
           echo "GD_OPTIONS=--with-freetype-dir=/usr/include --with-jpeg-dir=/usr/include" >> ${GITHUB_ENV}
@@ -51,7 +59,7 @@ jobs:
           echo "APCU=apcu" >>  ${GITHUB_ENV}
           echo "FORCE_YES=" >>  ${GITHUB_ENV}
           echo "APT_REPO=cloudfront.debian.net/debian-archive" >> ${GITHUB_ENV}
-          echo "APT_SECURITY_REPO=cloudfront.debian.net/debian-archive/debian-security" >> ${GITHUB_ENV}
+          echo "APT_SECURITY_REPO=cloudfront.debian.net/debian-archive" >> ${GITHUB_ENV}
       - if: ${{ matrix.php >= 7.1 && matrix.php <= 7.3 }}
         run: |
           echo "GD_OPTIONS=--with-freetype-dir=/usr/include --with-jpeg-dir=/usr/include" >> ${GITHUB_ENV}
diff --git a/.github/workflows/e2e-tests.yml b/.github/workflows/e2e-tests.yml
index eacef8bfcb..3f15f1646e 100644
--- a/.github/workflows/e2e-tests.yml
+++ b/.github/workflows/e2e-tests.yml
@@ -113,7 +113,7 @@ jobs:
         echo "FORCE_YES=--force-yes" >> ${GITHUB_ENV}
         echo "APT_REPO=cloudfront.debian.net/debian-archive" >> ${GITHUB_ENV}
         echo "APT_SECURITY_REPO=cloudfront.debian.net/debian-archive/debian-security" >> ${GITHUB_ENV}
-    - if: ${{ matrix.php == 5.5 || matrix.php == 5.6 }}
+    - if: ${{ matrix.php == 5.5 }}
       run: |
         echo "GD_OPTIONS=--with-freetype-dir=/usr/include --with-jpeg-dir=/usr/include" >> ${GITHUB_ENV}
         echo "EXT_INSTALL_ARGS=gd zip mysqli pgsql opcache" >> ${GITHUB_ENV}
@@ -121,6 +121,14 @@ jobs:
         echo "FORCE_YES=--force-yes" >>  ${GITHUB_ENV}
         echo "APT_REPO=cloudfront.debian.net/debian-archive" >> ${GITHUB_ENV}
         echo "APT_SECURITY_REPO=cloudfront.debian.net/debian-archive/debian-security" >> ${GITHUB_ENV}
+    - if: ${{ matrix.php == 5.6 }}
+      run: |
+        echo "GD_OPTIONS=--with-freetype-dir=/usr/include --with-jpeg-dir=/usr/include" >> ${GITHUB_ENV}
+        echo "EXT_INSTALL_ARGS=gd zip mysqli pgsql opcache" >> ${GITHUB_ENV}
+        echo "APCU=" >>  ${GITHUB_ENV}
+        echo "FORCE_YES=--force-yes" >>  ${GITHUB_ENV}
+        echo "APT_REPO=cloudfront.debian.net/debian-archive" >> ${GITHUB_ENV}
+        echo "APT_SECURITY_REPO=cloudfront.debian.net/debian-archive" >> ${GITHUB_ENV}
     - if: ${{ matrix.php == 7.0 }}
       run: |
         echo "GD_OPTIONS=--with-freetype-dir=/usr/include --with-jpeg-dir=/usr/include" >> ${GITHUB_ENV}
@@ -128,7 +136,7 @@ jobs:
         echo "APCU=apcu" >>  ${GITHUB_ENV}
         echo "FORCE_YES=" >>  ${GITHUB_ENV}
         echo "APT_REPO=cloudfront.debian.net/debian-archive" >> ${GITHUB_ENV}
-        echo "APT_SECURITY_REPO=cloudfront.debian.net/debian-archive/debian-security" >> ${GITHUB_ENV}
+        echo "APT_SECURITY_REPO=cloudfront.debian.net/debian-archive" >> ${GITHUB_ENV}
     - if: ${{ matrix.php >= 7.1 && matrix.php <= 7.3 }}
       run: |
         echo "GD_OPTIONS=--with-freetype-dir=/usr/include --with-jpeg-dir=/usr/include" >> ${GITHUB_ENV}
diff --git a/Dockerfile b/Dockerfile
index a5b6a7c8b2..bff7982e1c 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -13,6 +13,7 @@ ARG APT_SECURITY_REPO="security.debian.org"
 RUN if [ ! -d /usr/share/man/man1 ]; then mkdir /usr/share/man/man1; fi
 RUN if [ ! -d /usr/share/man/man7 ]; then mkdir /usr/share/man/man7; fi
 
+RUN if [ ! -e /etc/apt/sources.list ]; then touch /etc/apt/sources.list; fi # for bookworm
 RUN sed -i s,deb.debian.org,${APT_REPO},g /etc/apt/sources.list;
 RUN sed -i s,security.debian.org,${APT_SECURITY_REPO},g /etc/apt/sources.list;
 RUN sed -i s,httpredir.debian.org,${APT_REPO},g /etc/apt/sources.list; # for jessie