diff --git a/defaults/main.yml b/defaults/main.yaml
similarity index 100%
rename from defaults/main.yml
rename to defaults/main.yaml
diff --git a/handlers/main.yml b/handlers/main.yaml
similarity index 100%
rename from handlers/main.yml
rename to handlers/main.yaml
diff --git a/meta/main.yml b/meta/main.yaml
similarity index 100%
rename from meta/main.yml
rename to meta/main.yaml
diff --git a/tasks/main.yml b/tasks/main.yaml
similarity index 99%
rename from tasks/main.yml
rename to tasks/main.yaml
index 491d95f..a668fab 100644
--- a/tasks/main.yml
+++ b/tasks/main.yaml
@@ -7,7 +7,7 @@
     fail_msg: "No subnet defined"
 
 - name: Include OS-specific variables
-  ansible.builtin.include_vars: "{{ ansible_facts['os_family'] }}.yml"
+  ansible.builtin.include_vars: "{{ ansible_facts['os_family'] }}.yaml"
 
 - name: Install dhcpd with dependencies
   ansible.builtin.package:
diff --git a/vars/Archlinux.yml b/vars/Archlinux.yaml
similarity index 100%
rename from vars/Archlinux.yml
rename to vars/Archlinux.yaml
diff --git a/vars/Debian.yml b/vars/Debian.yaml
similarity index 100%
rename from vars/Debian.yml
rename to vars/Debian.yaml
diff --git a/vars/RedHat.yml b/vars/RedHat.yaml
similarity index 100%
rename from vars/RedHat.yml
rename to vars/RedHat.yaml