diff --git a/.github/workflows/external_trigger.yml b/.github/workflows/external_trigger.yml
index 3e03438..35d7c01 100644
--- a/.github/workflows/external_trigger.yml
+++ b/.github/workflows/external_trigger.yml
@@ -18,7 +18,7 @@ jobs:
           fi
           echo "**** External trigger running off of master branch. To disable this trigger, set a Github secret named \"PAUSE_EXTERNAL_TRIGGER_RADARR_MASTER\". ****"
           echo "**** Retrieving external version ****"
-          EXT_RELEASE=$(curl -sL https://radarr.servarr.com/v1/update/master/changes?runtime=netcore%26os=linux | jq -r '.[0].version')
+          EXT_RELEASE=$(curl -sL https://radarr.servarr.com/v1/update/master/changes?runtime=netcore%26os=linuxmusl | jq -r '.[0].version')
           if [ -z "${EXT_RELEASE}" ] || [ "${EXT_RELEASE}" == "null" ]; then
             echo "**** Can't retrieve external version, exiting ****"
             FAILURE_REASON="Can't retrieve external version for radarr branch master"
diff --git a/Dockerfile b/Dockerfile
index d17b3ba..f898147 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM ghcr.io/linuxserver/baseimage-ubuntu:focal
+FROM ghcr.io/linuxserver/baseimage-alpine:3.15
 
 # set version label
 ARG BUILD_DATE
@@ -8,7 +8,6 @@ LABEL build_version="Linuxserver.io version:- ${VERSION} Build-date:- ${BUILD_DA
 LABEL maintainer="thelamer"
 
 # environment settings
-ARG DEBIAN_FRONTEND="noninteractive"
 ARG RADARR_BRANCH="master"
 ENV XDG_CONFIG_HOME="/config/xdg"
 
@@ -23,22 +22,20 @@ RUN \
   echo "**** install radarr ****" && \
   mkdir -p /app/radarr/bin && \
   if [ -z ${RADARR_RELEASE+x} ]; then \
-    RADARR_RELEASE=$(curl -sL "https://radarr.servarr.com/v1/update/${RADARR_BRANCH}/changes?runtime=netcore&os=linux" \
+    RADARR_RELEASE=$(curl -sL "https://radarr.servarr.com/v1/update/${RADARR_BRANCH}/changes?runtime=netcore&os=linuxmusl" \
     | jq -r '.[0].version'); \
   fi && \
   curl -o \
     /tmp/radarr.tar.gz -L \
-    "https://radarr.servarr.com/v1/update/${RADARR_BRANCH}/updatefile?version=${RADARR_RELEASE}&os=linux&runtime=netcore&arch=x64" && \
-  tar ixzf \
+    "https://radarr.servarr.com/v1/update/${RADARR_BRANCH}/updatefile?version=${RADARR_RELEASE}&os=linuxmusl&runtime=netcore&arch=x64" && \
+  tar xzf \
     /tmp/radarr.tar.gz -C \
     /app/radarr/bin --strip-components=1 && \
-  echo "UpdateMethod=docker\nBranch=${RADARR_BRANCH}\nPackageVersion=${VERSION}\nPackageAuthor=linuxserver.io" > /app/radarr/package_info && \
+  echo -e "UpdateMethod=docker\nBranch=${RADARR_BRANCH}\nPackageVersion=${VERSION}\nPackageAuthor=[linuxserver.io](https://linuxserver.io)\nPackageGlobalMessage=Warn: This image is now based on Alpine. Custom scripts using apt-get will need to be updated to use apk" > /app/radarr/package_info && \
   echo "**** cleanup ****" && \
   rm -rf \
     /app/radarr/bin/Radarr.Update \
-    /tmp/* \
-    /var/lib/apt/lists/* \
-    /var/tmp/*
+    /tmp/*
 
 # copy local files
 COPY root/ /
diff --git a/Dockerfile.aarch64 b/Dockerfile.aarch64
index 8e4a96a..554a0a5 100644
--- a/Dockerfile.aarch64
+++ b/Dockerfile.aarch64
@@ -7,8 +7,6 @@ ARG RADARR_RELEASE
 LABEL build_version="Linuxserver.io version:- ${VERSION} Build-date:- ${BUILD_DATE}"
 LABEL maintainer="thelamer"
 
-# environment settings
-ARG DEBIAN_FRONTEND="noninteractive"
 ARG RADARR_BRANCH="master"
 ENV XDG_CONFIG_HOME="/config/xdg"
 
@@ -23,22 +21,20 @@ RUN \
   echo "**** install radarr ****" && \
   mkdir -p /app/radarr/bin && \
   if [ -z ${RADARR_RELEASE+x} ]; then \
-    RADARR_RELEASE=$(curl -sL "https://radarr.servarr.com/v1/update/${RADARR_BRANCH}/changes?runtime=netcore&os=linux" \
+    RADARR_RELEASE=$(curl -sL "https://radarr.servarr.com/v1/update/${RADARR_BRANCH}/changes?runtime=netcore&os=linuxmusl" \
     | jq -r '.[0].version'); \
   fi && \
   curl -o \
     /tmp/radarr.tar.gz -L \
-    "https://radarr.servarr.com/v1/update/${RADARR_BRANCH}/updatefile?version=${RADARR_RELEASE}&os=linux&runtime=netcore&arch=arm64" && \
-  tar ixzf \
+    "https://radarr.servarr.com/v1/update/${RADARR_BRANCH}/updatefile?version=${RADARR_RELEASE}&os=linuxmusl&runtime=netcore&arch=arm64" && \
+  tar xzf \
     /tmp/radarr.tar.gz -C \
     /app/radarr/bin --strip-components=1 && \
-  echo "UpdateMethod=docker\nBranch=${RADARR_BRANCH}\nPackageVersion=${VERSION}\nPackageAuthor=linuxserver.io" > /app/radarr/package_info && \
+  echo -e "UpdateMethod=docker\nBranch=${RADARR_BRANCH}\nPackageVersion=${VERSION}\nPackageAuthor=[linuxserver.io](https://linuxserver.io)\nPackageGlobalMessage=Warn: This image is now based on Alpine. Custom scripts using apt-get will need to be updated to use apk" > /app/radarr/package_info && \
   echo "**** cleanup ****" && \
   rm -rf \
     /app/radarr/bin/Radarr.Update \
-    /tmp/* \
-    /var/lib/apt/lists/* \
-    /var/tmp/*
+    /tmp/*
 
 # copy local files
 COPY root/ /
diff --git a/Dockerfile.armhf b/Dockerfile.armhf
index 0e4081f..8a504d6 100644
--- a/Dockerfile.armhf
+++ b/Dockerfile.armhf
@@ -8,7 +8,6 @@ LABEL build_version="Linuxserver.io version:- ${VERSION} Build-date:- ${BUILD_DA
 LABEL maintainer="thelamer"
 
 # environment settings
-ARG DEBIAN_FRONTEND="noninteractive"
 ARG RADARR_BRANCH="master"
 ENV XDG_CONFIG_HOME="/config/xdg"
 
@@ -23,22 +22,20 @@ RUN \
   echo "**** install radarr ****" && \
   mkdir -p /app/radarr/bin && \
   if [ -z ${RADARR_RELEASE+x} ]; then \
-    RADARR_RELEASE=$(curl -sL "https://radarr.servarr.com/v1/update/${RADARR_BRANCH}/changes?runtime=netcore&os=linux" \
+    RADARR_RELEASE=$(curl -sL "https://radarr.servarr.com/v1/update/${RADARR_BRANCH}/changes?runtime=netcore&os=linuxmusl" \
     | jq -r '.[0].version'); \
   fi && \
   curl -o \
     /tmp/radarr.tar.gz -L \
-    "https://radarr.servarr.com/v1/update/${RADARR_BRANCH}/updatefile?version=${RADARR_RELEASE}&os=linux&runtime=netcore&arch=arm" && \
-  tar ixzf \
+    "https://radarr.servarr.com/v1/update/${RADARR_BRANCH}/updatefile?version=${RADARR_RELEASE}&os=linuxmusl&runtime=netcore&arch=arm" && \
+  tar xzf \
     /tmp/radarr.tar.gz -C \
     /app/radarr/bin --strip-components=1 && \
   echo "**** cleanup ****" && \
-  echo "UpdateMethod=docker\nBranch=${RADARR_BRANCH}\nPackageVersion=${VERSION}\nPackageAuthor=linuxserver.io" > /app/radarr/package_info && \
+  echo -e "UpdateMethod=docker\nBranch=${RADARR_BRANCH}\nPackageVersion=${VERSION}\nPackageAuthor=[linuxserver.io](https://linuxserver.io)\nPackageGlobalMessage=Warn: This image is now based on Alpine. Custom scripts using apt-get will need to be updated to use apk" > /app/radarr/package_info && \
   rm -rf \
     /app/radarr/bin/Radarr.Update \
-    /tmp/* \
-    /var/lib/apt/lists/* \
-    /var/tmp/*
+    /tmp/*
 
 # copy local files
 COPY root/ /
diff --git a/Jenkinsfile b/Jenkinsfile
index e6de305..14fa949 100644
--- a/Jenkinsfile
+++ b/Jenkinsfile
@@ -24,7 +24,7 @@ pipeline {
     DOCKERHUB_IMAGE = 'linuxserver/radarr'
     DEV_DOCKERHUB_IMAGE = 'lsiodev/radarr'
     PR_DOCKERHUB_IMAGE = 'lspipepr/radarr'
-    DIST_IMAGE = 'ubuntu'
+    DIST_IMAGE = 'alpine'
     MULTIARCH='true'
     CI='true'
     CI_WEB='true'
@@ -104,7 +104,7 @@ pipeline {
       steps{
         script{
           env.EXT_RELEASE = sh(
-            script: ''' curl -sL https://radarr.servarr.com/v1/update/master/changes?runtime=netcore%26os=linux | jq -r '.[0].version' ''',
+            script: ''' curl -sL https://radarr.servarr.com/v1/update/master/changes?runtime=netcore%26os=linuxmusl | jq -r '.[0].version' ''',
             returnStdout: true).trim()
             env.RELEASE_LINK = 'custom_command'
         }
diff --git a/README.md b/README.md
index 3eb0054..1960050 100644
--- a/README.md
+++ b/README.md
@@ -245,6 +245,7 @@ Once registered you can define the dockerfile to use with `-f Dockerfile.aarch64
 
 ## Versions
 
+* **06.06.22:** - Rebase master branch to Alpine 3.15.
 * **20.02.22:** - Rebase develop branch to Alpine.
 * **04.02.22:** - Rebase nightly branch to Alpine and deprecate nightly-alpine branch.
 * **27.12.21:** - Add nightly-alpine branch.
diff --git a/jenkins-vars.yml b/jenkins-vars.yml
index 5285c61..9faf313 100644
--- a/jenkins-vars.yml
+++ b/jenkins-vars.yml
@@ -2,7 +2,7 @@
 # jenkins variables
 project_name: docker-radarr
 external_type: na
-custom_version_command: curl -sL https://radarr.servarr.com/v1/update/master/changes?runtime=netcore%26os=linux | jq -r '.[0].version'
+custom_version_command: curl -sL https://radarr.servarr.com/v1/update/master/changes?runtime=netcore%26os=linuxmusl | jq -r '.[0].version'
 release_type: stable
 release_tag: latest
 ls_branch: master
@@ -14,7 +14,7 @@ repo_vars:
   - DOCKERHUB_IMAGE = 'linuxserver/radarr'
   - DEV_DOCKERHUB_IMAGE = 'lsiodev/radarr'
   - PR_DOCKERHUB_IMAGE = 'lspipepr/radarr'
-  - DIST_IMAGE = 'ubuntu'
+  - DIST_IMAGE = 'alpine'
   - MULTIARCH='true'
   - CI='true'
   - CI_WEB='true'
diff --git a/readme-vars.yml b/readme-vars.yml
index d4ad4c2..8caaca6 100644
--- a/readme-vars.yml
+++ b/readme-vars.yml
@@ -56,6 +56,7 @@ app_setup_block: |
 
 # changelog
 changelogs:
+  - { date: "06.06.22:", desc: "Rebase master branch to Alpine 3.15." }
   - { date: "20.02.22:", desc: "Rebase develop branch to Alpine." }
   - { date: "04.02.22:", desc: "Rebase nightly branch to Alpine and deprecate nightly-alpine branch." }
   - { date: "27.12.21:", desc: "Add nightly-alpine branch." }