diff --git a/Dockerfile b/Dockerfile
index 54e08252..885a5046 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -9,21 +9,21 @@ LABEL maintainer="thelamer"
 
 
 RUN \
- echo "**** install packages ****" && \
- apk add --no-cache \
-	faenza-icon-theme \
-	faenza-icon-theme-xfce4-appfinder \
-	faenza-icon-theme-xfce4-panel \
-	firefox-esr \
-	mousepad \
-	thunar \
-	xfce4 \
-	xfce4-terminal && \
- apk add --no-cache --repository=http://dl-cdn.alpinelinux.org/alpine/edge/testing \
-        xfce4-pulseaudio-plugin && \
- echo "**** cleanup ****" && \
- rm -rf \
-	/tmp/*
+  echo "**** install packages ****" && \
+  apk add --no-cache \
+    faenza-icon-theme \
+    faenza-icon-theme-xfce4-appfinder \
+    faenza-icon-theme-xfce4-panel \
+    firefox-esr \
+    mousepad \
+    thunar \
+    xfce4 \
+    xfce4-terminal && \
+  apk add --no-cache --repository=http://dl-cdn.alpinelinux.org/alpine/edge/testing \
+    xfce4-pulseaudio-plugin && \
+  echo "**** cleanup ****" && \
+  rm -rf \
+    /tmp/*
 
 # add local files
 COPY /root /
diff --git a/Dockerfile.aarch64 b/Dockerfile.aarch64
index 63ce40dd..f659b755 100644
--- a/Dockerfile.aarch64
+++ b/Dockerfile.aarch64
@@ -9,21 +9,21 @@ LABEL maintainer="thelamer"
 
 
 RUN \
- echo "**** install packages ****" && \
- apk add --no-cache \
-	faenza-icon-theme \
-	faenza-icon-theme-xfce4-appfinder \
-	faenza-icon-theme-xfce4-panel \
-	firefox-esr \
-	mousepad \
-	thunar \
-	xfce4 \
-	xfce4-terminal && \
- apk add --no-cache --repository=http://dl-cdn.alpinelinux.org/alpine/edge/testing \
-        xfce4-pulseaudio-plugin && \
- echo "**** cleanup ****" && \
- rm -rf \
-	/tmp/*
+  echo "**** install packages ****" && \
+  apk add --no-cache \
+    faenza-icon-theme \
+    faenza-icon-theme-xfce4-appfinder \
+    faenza-icon-theme-xfce4-panel \
+    firefox-esr \
+    mousepad \
+    thunar \
+    xfce4 \
+    xfce4-terminal && \
+  apk add --no-cache --repository=http://dl-cdn.alpinelinux.org/alpine/edge/testing \
+    xfce4-pulseaudio-plugin && \
+  echo "**** cleanup ****" && \
+  rm -rf \
+    /tmp/*
 
 # add local files
 COPY /root /
diff --git a/Dockerfile.armhf b/Dockerfile.armhf
index 20231daa..fa83f95c 100644
--- a/Dockerfile.armhf
+++ b/Dockerfile.armhf
@@ -9,21 +9,21 @@ LABEL maintainer="thelamer"
 
 
 RUN \
- echo "**** install packages ****" && \
- apk add --no-cache \
-	faenza-icon-theme \
-	faenza-icon-theme-xfce4-appfinder \
-	faenza-icon-theme-xfce4-panel \
-	firefox-esr \
-	mousepad \
-	thunar \
-	xfce4 \
-	xfce4-terminal && \
- apk add --no-cache --repository=http://dl-cdn.alpinelinux.org/alpine/edge/testing \
-        xfce4-pulseaudio-plugin && \
- echo "**** cleanup ****" && \
- rm -rf \
-	/tmp/*
+  echo "**** install packages ****" && \
+  apk add --no-cache \
+    faenza-icon-theme \
+    faenza-icon-theme-xfce4-appfinder \
+    faenza-icon-theme-xfce4-panel \
+    firefox-esr \
+    mousepad \
+    thunar \
+    xfce4 \
+    xfce4-terminal && \
+  apk add --no-cache --repository=http://dl-cdn.alpinelinux.org/alpine/edge/testing \
+    xfce4-pulseaudio-plugin && \
+  echo "**** cleanup ****" && \
+  rm -rf \
+    /tmp/*
 
 # add local files
 COPY /root /