diff --git a/README.md b/README.md
index 02443a4..a15f995 100644
--- a/README.md
+++ b/README.md
@@ -61,7 +61,8 @@ choco install glow
 pkg install glow
 
 # Debian/Ubuntu
-echo 'deb [trusted=yes] https://repo.charm.sh/apt/ /' | sudo tee /etc/apt/sources.list.d/charm.list
+echo "deb https://repo.charm.sh/apt/ * *" | sudo tee /etc/apt/sources.list.d/charm.list
+curl https://repo.charm.sh/apt/gpg.key | sudo apt-key add -
 sudo apt update && sudo apt install glow
 
 # Fedora
@@ -69,7 +70,8 @@ echo '[charm]
 name=Charm
 baseurl=https://repo.charm.sh/yum/
 enabled=1
-gpgcheck=0' | sudo tee /etc/yum.repos.d/charm.repo
+gpgcheck=1
+gpgkey=https://repo.charm.sh/yum/gpg.key' | sudo tee /etc/yum.repos.d/charm.repo
 sudo yum install glow
 ```