diff --git a/Dockerfile b/Dockerfile
index cb87126..75d43f3 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM ghcr.io/linuxserver/baseimage-mono:LTS
+FROM ghcr.io/linuxserver/baseimage-mono:focal
 
 # set version label
 ARG BUILD_DATE
@@ -13,10 +13,17 @@ ENV XDG_CONFIG_HOME="/config/xdg"
 ENV SONARR_BRANCH="main"
 
 RUN \
+ echo "**** add mediaarea repository ****" && \
+  curl -L \
+    "https://mediaarea.net/repo/deb/repo-mediaarea_1.0-12_all.deb" \
+    -o /tmp/key.deb && \
+  dpkg -i /tmp/key.deb && \
+  echo "deb https://mediaarea.net/repo/deb/ubuntu focal main" | tee /etc/apt/sources.list.d/mediaarea.list && \
   echo "**** install packages ****" && \
   apt-get update && \
   apt-get install -y \
-    jq && \
+    jq \
+    mediainfo && \
   echo "**** install sonarr ****" && \
   mkdir -p /app/sonarr/bin && \
   if [ -z ${SONARR_VERSION+x} ]; then \
diff --git a/Dockerfile.aarch64 b/Dockerfile.aarch64
index 444be04..9450e93 100644
--- a/Dockerfile.aarch64
+++ b/Dockerfile.aarch64
@@ -1,4 +1,4 @@
-FROM ghcr.io/linuxserver/baseimage-mono:arm64v8-LTS
+FROM ghcr.io/linuxserver/baseimage-mono:arm64v8-focal
 
 # set version label
 ARG BUILD_DATE
@@ -13,10 +13,17 @@ ENV XDG_CONFIG_HOME="/config/xdg"
 ENV SONARR_BRANCH="main"
 
 RUN \
+ echo "**** add mediaarea repository ****" && \
+  curl -L \
+    "https://mediaarea.net/repo/deb/repo-mediaarea_1.0-12_all.deb" \
+    -o /tmp/key.deb && \
+  dpkg -i /tmp/key.deb && \
+  echo "deb https://mediaarea.net/repo/deb/ubuntu focal main" | tee /etc/apt/sources.list.d/mediaarea.list && \
   echo "**** install packages ****" && \
   apt-get update && \
   apt-get install -y \
-    jq && \
+    jq \
+    mediainfo && \
   echo "**** install sonarr ****" && \
   mkdir -p /app/sonarr/bin && \
   if [ -z ${SONARR_VERSION+x} ]; then \
diff --git a/Dockerfile.armhf b/Dockerfile.armhf
index f0051f7..8bb1b92 100644
--- a/Dockerfile.armhf
+++ b/Dockerfile.armhf
@@ -1,4 +1,4 @@
-FROM ghcr.io/linuxserver/baseimage-mono:arm32v7-LTS
+FROM ghcr.io/linuxserver/baseimage-mono:arm32v7-focal
 
 # set version label
 ARG BUILD_DATE
@@ -13,10 +13,17 @@ ENV XDG_CONFIG_HOME="/config/xdg"
 ENV SONARR_BRANCH="main"
 
 RUN \
+ echo "**** add mediaarea repository ****" && \
+  curl -L \
+    "https://mediaarea.net/repo/deb/repo-mediaarea_1.0-12_all.deb" \
+    -o /tmp/key.deb && \
+  dpkg -i /tmp/key.deb && \
+  echo "deb https://mediaarea.net/repo/deb/ubuntu focal main" | tee /etc/apt/sources.list.d/mediaarea.list && \
   echo "**** install packages ****" && \
   apt-get update && \
   apt-get install -y \
-    jq && \
+    jq \
+    mediainfo && \
   echo "**** install sonarr ****" && \
   mkdir -p /app/sonarr/bin && \
   if [ -z ${SONARR_VERSION+x} ]; then \
diff --git a/readme-vars.yml b/readme-vars.yml
index e83b3a1..e488599 100644
--- a/readme-vars.yml
+++ b/readme-vars.yml
@@ -56,6 +56,7 @@ app_setup_block: |
 
 # changelog
 changelogs:
+  - { date: "28.04.22:", desc: "Rebase master branch to mono 6.12 base (focal)." }
   - { date: "20.02.22:", desc: "Rebase develop branch to Alpine, deprecate develop-alpine branch." }
   - { date: "28.12.21:", desc: "Add develop-alpine branch." }
   - { date: "11.05.21:", desc: "Make the paths clearer to the user." }