diff --git a/vars/Debian.yml b/vars/Debian.yml
index f2eabc4..9f90a11 100644
--- a/vars/Debian.yml
+++ b/vars/Debian.yml
@@ -1,3 +1,4 @@
+---
 # Used only for Debian/Ubuntu (Debian OS-Family)
 # https://docs.docker.com/engine/install/debian/#uninstall-old-versions
 
diff --git a/vars/RedHat.yml b/vars/RedHat.yml
index 71d4240..d8063fb 100644
--- a/vars/RedHat.yml
+++ b/vars/RedHat.yml
@@ -1,3 +1,4 @@
+---
 # Used only for Fedora/Rocky (RedHat OS-Family)
 # https://docs.docker.com/engine/install/fedora/#uninstall-old-versions
 # https://docs.docker.com/engine/install/centos/#uninstall-old-versions