diff --git a/config/service/dovecot/Containerfile b/config/service/dovecot/Containerfile
index a42b166..cfb16d8 100644
--- a/config/service/dovecot/Containerfile
+++ b/config/service/dovecot/Containerfile
@@ -1,8 +1,7 @@
 FROM docker.io/debian:stable-slim
 ARG VERSION=2.3.4
 
-RUN apt-get update -y && \
-    apt-get install -y --no-install-recommends \
+RUN apt-get update -y && apt-get install -y --no-install-recommends \
     dovecot-imapd=1:${VERSION}* dovecot-lmtpd=1:${VERSION}* dovecot-mysql=1:${VERSION}* \
     dovecot-sieve=1:${VERSION}* dovecot-managesieved=1:${VERSION}* \
     gettext ca-certificates curl
diff --git a/config/service/git/Containerfile b/config/service/git/Containerfile
index ba46492..c680044 100644
--- a/config/service/git/Containerfile
+++ b/config/service/git/Containerfile
@@ -1,7 +1,7 @@
 FROM docker.io/debian:stable-slim
 
-RUN apt-get update -y && \
-    apt-get install -y --no-install-recommends git openssh-server ca-certificates
+RUN apt-get update -y && apt-get install -y --no-install-recommends \
+    ca-certificates git openssh-server
 
 RUN addgroup --system --gid 10000 git
 RUN adduser --system --uid 10000 --ingroup git --shell /usr/bin/git-shell --home /home/git git
diff --git a/config/service/postfix/Containerfile b/config/service/postfix/Containerfile
index 6267cc3..09c1646 100644
--- a/config/service/postfix/Containerfile
+++ b/config/service/postfix/Containerfile
@@ -1,8 +1,7 @@
 FROM docker.io/debian:stable-slim
 ARG VERSION=3.4.14
 
-RUN apt-get update -y && \
-    apt-get install -y --no-install-recommends \
+RUN apt-get update -y && apt-get install -y --no-install-recommends \
     postfix=${VERSION}* postfix-mysql=${VERSION}* syslog-ng-core gettext ca-certificates
 
 COPY container/config /etc/postfix
diff --git a/config/service/prosody/Containerfile b/config/service/prosody/Containerfile
index 256d6e1..9b643bc 100644
--- a/config/service/prosody/Containerfile
+++ b/config/service/prosody/Containerfile
@@ -1,14 +1,14 @@
 FROM docker.io/debian:stable-slim
 ARG VERSION=0.11.8
 
-RUN apt-get update -y && apt-get upgrade -y && \
-    apt-get install -y --no-install-recommends curl mercurial gnupg ca-certificates apt-transport-https
+RUN apt-get update -y && apt-get install -y --no-install-recommends \
+    curl mercurial gnupg ca-certificates apt-transport-https
 
 RUN echo "deb https://packages.prosody.im/debian stable main" > /etc/apt/sources.list.d/prosody.list && \
     echo "deb-src https://packages.prosody.im/debian stable main" >> /etc/apt/sources.list.d/prosody.list && \
     curl -o - https://prosody.im/files/prosody-debian-packages.key | apt-key add - && \
-    apt-get update -y && \
-    apt-get install -y --no-install-recommends lua-dbi-mysql lua-event lua-zlib lua-sec lua-bitop prosody=${VERSION}*
+    apt-get update -y && apt-get install -y --no-install-recommends \
+    lua-dbi-mysql lua-event lua-zlib lua-sec lua-bitop prosody=${VERSION}*
 
 RUN mkdir -p /usr/lib/prosody/community-modules && \
     hg clone https://hg.prosody.im/prosody-modules /usr/lib/prosody/community-modules
diff --git a/config/service/radicale/Containerfile b/config/service/radicale/Containerfile
index a40842c..15db33d 100644
--- a/config/service/radicale/Containerfile
+++ b/config/service/radicale/Containerfile
@@ -1,8 +1,8 @@
 FROM docker.io/debian:stable-slim
 ARG VERSION=3.0.6
 
-RUN apt-get update -y && apt-get upgrade -y && \
-    apt-get install -y --no-install-recommends python3 python3-pip python3-setuptools gettext
+RUN apt-get update -y && apt-get install -y --no-install-recommends \
+    python3 python3-pip python3-setuptools gettext
 
 RUN python3 -m pip install --upgrade pip && \
     python3 -m pip install radicale==$VERSION https://github.com/Unrud/RadicaleIMAP/archive/master.tar.gz
diff --git a/config/service/rspamd/Containerfile b/config/service/rspamd/Containerfile
index f750cc1..51ea25c 100644
--- a/config/service/rspamd/Containerfile
+++ b/config/service/rspamd/Containerfile
@@ -1,8 +1,8 @@
 FROM docker.io/debian:stable-slim
 ARG VERSION=2.7
 
-RUN apt-get update -y && \
-    apt-get install -y --no-install-recommends curl gnupg ca-certificates
+RUN apt-get update -y && apt-get install -y --no-install-recommends \
+    ca-certificates curl gnupg
 
 RUN echo "deb https://rspamd.com/apt-stable/ buster main" > /etc/apt/sources.list.d/rspamd.list && \
     echo "deb-src https://rspamd.com/apt-stable/ buster main" >> /etc/apt/sources.list.d/rspamd.list && \