diff --git a/Dockerfile b/Dockerfile
index b00e45d..0fc2eb2 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,6 +1,6 @@
 # syntax=docker/dockerfile:1
 
-FROM ghcr.io/linuxserver/baseimage-alpine:3.19 as buildstage
+FROM ghcr.io/linuxserver/baseimage-alpine:3.20 as buildstage
 ############## build stage ##############
 
 # package version
@@ -87,7 +87,7 @@ RUN \
     >> /tmp/znc/packages
 ############## runtime stage ##############
 
-FROM ghcr.io/linuxserver/baseimage-alpine:3.19
+FROM ghcr.io/linuxserver/baseimage-alpine:3.20
 
 # set version label
 ARG BUILD_DATE
@@ -103,11 +103,13 @@ RUN \
   echo "**** install runtime packages ****" && \
   RUNTIME_PACKAGES=$(echo $(cat /packages)) && \
   apk add -U --update --no-cache \
-    ${RUNTIME_PACKAGES}
+    ${RUNTIME_PACKAGES} && \
+  printf "Linuxserver.io version: ${VERSION}\nBuild-date: ${BUILD_DATE}" > /build_version
 
 # copy local files
 COPY root/ /
 
 # ports and volumes
 EXPOSE 6501
+
 VOLUME /config
diff --git a/Dockerfile.aarch64 b/Dockerfile.aarch64
index 385b3ba..e5c9eb8 100644
--- a/Dockerfile.aarch64
+++ b/Dockerfile.aarch64
@@ -1,6 +1,6 @@
 # syntax=docker/dockerfile:1
 
-FROM ghcr.io/linuxserver/baseimage-alpine:arm64v8-3.19 as buildstage
+FROM ghcr.io/linuxserver/baseimage-alpine:arm64v8-3.20 as buildstage
 ############## build stage ##############
 
 # package version
@@ -86,7 +86,7 @@ RUN \
     >> /tmp/znc/packages
 ############## runtime stage ##############
 
-FROM ghcr.io/linuxserver/baseimage-alpine:arm64v8-3.19
+FROM ghcr.io/linuxserver/baseimage-alpine:arm64v8-3.20
 
 # set version label
 ARG BUILD_DATE
@@ -102,11 +102,13 @@ RUN \
   echo "**** install runtime packages ****" && \
   RUNTIME_PACKAGES=$(echo $(cat /packages)) && \
   apk add -U --update --no-cache \
-    ${RUNTIME_PACKAGES}
+    ${RUNTIME_PACKAGES} && \
+  printf "Linuxserver.io version: ${VERSION}\nBuild-date: ${BUILD_DATE}" > /build_version
 
 # copy local files
 COPY root/ /
 
 # ports and volumes
 EXPOSE 6501
+
 VOLUME /config
diff --git a/Jenkinsfile b/Jenkinsfile
index c229f4a..090115b 100644
--- a/Jenkinsfile
+++ b/Jenkinsfile
@@ -33,8 +33,8 @@ pipeline {
     CI_PORT='6501'
     CI_SSL='false'
     CI_DELAY='30'
-    CI_DOCKERENV='TZ=US/Pacific'
-    CI_AUTH='user:password'
+    CI_DOCKERENV=''
+    CI_AUTH=''
     CI_WEBPATH=''
   }
   stages {
diff --git a/README.md b/README.md
index 71c5ca9..75d7267 100644
--- a/README.md
+++ b/README.md
@@ -275,6 +275,7 @@ Once registered you can define the dockerfile to use with `-f Dockerfile.aarch64
 
 ## Versions
 
+* **06.06.24:** - Rebase to Alpine 3.20.
 * **26.03.24:** - Switch back to multi-threaded builds and ignore `-beta` and `-alpha` tags as well as `-rc`.
 * **22.02.24:** - Update build system for v1.9.0 (use cmake).
 * **23.12.23:** - Rebase to Alpine 3.19.
diff --git a/jenkins-vars.yml b/jenkins-vars.yml
index f8a323f..1fb1a58 100644
--- a/jenkins-vars.yml
+++ b/jenkins-vars.yml
@@ -23,6 +23,6 @@ repo_vars:
   - CI_PORT='6501'
   - CI_SSL='false'
   - CI_DELAY='30'
-  - CI_DOCKERENV='TZ=US/Pacific'
-  - CI_AUTH='user:password'
+  - CI_DOCKERENV=''
+  - CI_AUTH=''
   - CI_WEBPATH=''
diff --git a/readme-vars.yml b/readme-vars.yml
index 6ba784a..5941138 100644
--- a/readme-vars.yml
+++ b/readme-vars.yml
@@ -11,30 +11,16 @@ project_blurb_optional_extras_enabled: false
 available_architectures:
   - {arch: "{{ arch_x86_64 }}", tag: "amd64-latest"}
   - {arch: "{{ arch_arm64 }}", tag: "arm64v8-latest"}
-# development version
-development_versions: false
+
 # container parameters
 common_param_env_vars_enabled: true
 param_container_name: "{{ project_name }}"
-param_usage_include_net: false
-param_usage_include_env: true
-param_env_vars:
-  - {env_var: "TZ", env_value: "Europe/London", desc: "Specify a timezone to use EG Europe/London."}
 param_usage_include_vols: true
 param_volumes:
   - { vol_path: "/config", vol_host_path: "/path/to/{{ project_name }}/config", desc: "Persistent config files" }
 param_usage_include_ports: true
 param_ports:
   - {external_port: "6501", internal_port: "6501", port_desc: "Port ZNC listens on."}
-param_device_map: false
-cap_add_param: false
-# optional container parameters
-opt_param_usage_include_env: false
-opt_param_usage_include_vols: false
-opt_param_usage_include_ports: false
-opt_param_device_map: false
-opt_cap_add_param: false
-optional_block_1: false
 # application setup block
 app_setup_block_enabled: true
 app_setup_block: |
@@ -45,6 +31,7 @@ app_setup_block: |
   `change password ASAP.`
 # changelog
 changelogs:
+  - {date: "06.06.24:", desc: "Rebase to Alpine 3.20."}
   - {date: "26.03.24:", desc: "Switch back to multi-threaded builds and ignore `-beta` and `-alpha` tags as well as `-rc`."}
   - {date: "22.02.24:", desc: "Update build system for v1.9.0 (use cmake)."}
   - {date: "23.12.23:", desc: "Rebase to Alpine 3.19."}