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 97%
rename from tasks/main.yml
rename to tasks/main.yaml
index 8ae2945..b681edd 100644
--- a/tasks/main.yml
+++ b/tasks/main.yaml
@@ -1,7 +1,7 @@
 ---
 
 - name: "Include OS-specific variables"
-  ansible.builtin.include_vars: "{{ ansible_os_family }}.yml"
+  ansible.builtin.include_vars: "{{ ansible_facts['os_family'] }}.yaml"
 
 - name: "Remove existing systemd-networkd configuration"
   ansible.builtin.file:
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