diff --git a/doc/02-Installation.md b/doc/02-Installation.md
index e7e359aa9..f2c2ab30c 100644
--- a/doc/02-Installation.md
+++ b/doc/02-Installation.md
@@ -81,14 +81,18 @@ wget https://packages.icinga.com/centos/ICINGA-release.repo -O /etc/yum.repos.d/
 
 ```bash
 apt update
-apt -y install apt-transport-https wget gnupg
+apt -y install apt-transport-https wget
 
-wget -O - https://packages.icinga.com/icinga.key | apt-key add -
+wget -O icinga-archive-keyring.deb "https://packages.icinga.com/icinga-archive-keyring_latest+debian$(
+ . /etc/os-release; echo "$VERSION_ID"
+).deb"
+
+apt install ./icinga-archive-keyring.deb
 
 DIST=$(awk -F"[)(]+" '/VERSION=/ {print $2}' /etc/os-release); \
- echo "deb https://packages.icinga.com/debian icinga-${DIST} main" > \
+ echo "deb [signed-by=/usr/share/keyrings/icinga-archive-keyring.gpg] https://packages.icinga.com/debian icinga-${DIST} main" > \
  /etc/apt/sources.list.d/${DIST}-icinga.list
- echo "deb-src https://packages.icinga.com/debian icinga-${DIST} main" >> \
+ echo "deb-src [signed-by=/usr/share/keyrings/icinga-archive-keyring.gpg] https://packages.icinga.com/debian icinga-${DIST} main" >> \
  /etc/apt/sources.list.d/${DIST}-icinga.list
 
 apt update
@@ -147,14 +151,18 @@ zypper ref
 
 ```bash
 apt update
-apt -y install apt-transport-https wget gnupg
+apt -y install apt-transport-https wget
+
+wget -O icinga-archive-keyring.deb "https://packages.icinga.com/icinga-archive-keyring_latest+ubuntu$(
+ . /etc/os-release; echo "$VERSION_ID"
+).deb"
 
-wget -O - https://packages.icinga.com/icinga.key | apt-key add -
+apt install ./icinga-archive-keyring.deb
 
 . /etc/os-release; if [ ! -z ${UBUNTU_CODENAME+x} ]; then DIST="${UBUNTU_CODENAME}"; else DIST="$(lsb_release -c| awk '{print $2}')"; fi; \
- echo "deb https://packages.icinga.com/ubuntu icinga-${DIST} main" > \
+ echo "deb [signed-by=/usr/share/keyrings/icinga-archive-keyring.gpg] https://packages.icinga.com/ubuntu icinga-${DIST} main" > \
  /etc/apt/sources.list.d/${DIST}-icinga.list
- echo "deb-src https://packages.icinga.com/ubuntu icinga-${DIST} main" >> \
+ echo "deb-src [signed-by=/usr/share/keyrings/icinga-archive-keyring.gpg] https://packages.icinga.com/ubuntu icinga-${DIST} main" >> \
  /etc/apt/sources.list.d/${DIST}-icinga.list
 
 apt update