diff --git a/defaults/main.yml b/defaults/main.yml
index fdb0c5b..1296fa3 100644
--- a/defaults/main.yml
+++ b/defaults/main.yml
@@ -24,7 +24,7 @@ mumble_web_owner: mumble-web
 mumble_web_group: "{{ mumble_web_owner }}"
 mumble_web_certificate: "{{ acme_certs_dir }}/{{ mumble_web_domain }}.d/{{ acme_enabled | ternary('fullchain','cert') }}.pem"
 mumble_web_trusted_certificate: "{{ acme_certs_dir }}/{{ mumble_web_domain }}.d/chain.pem"
-mumble_web_private_key: "{{ acme_keys_dir }}/{{ mumble_web_domain }}.pem"
+mumble_web_private_key: "{{ acme_keys_dir }}/{{ mumble_web_domain }}.key"
 mumble_web_www_dir: /var/www/mumble-web
 mumble_web_version: master
 mumble_web_websockify_port: "64737"
@@ -88,7 +88,7 @@ murmur_register:
 murmur_bonjour_enabled: no
 murmur_certificate: "{{ acme_certs_dir }}/{{ murmur_domain }}.d/{{ acme_enabled | ternary('fullchain', 'cert') }}.pem"
 murmur_trusted_certificate: "{{ acme_certs_dir }}/{{ murmur_domain }}.d/chain.pem"
-murmur_private_key: "{{ acme_keys_dir }}/{{ murmur_domain }}.pem"
+murmur_private_key: "{{ acme_keys_dir }}/{{ murmur_domain }}.key"
 murmur_dhparam: "@ffdhe4096"
 murmur_owner: "mumble-server"
 murmur_group: "{{ murmur_owner }}"
@@ -128,6 +128,6 @@ umurmur_channel_links:
     }}
 umurmur_ssl_group: "{{ acme_ssl_group }}"
 umurmur_certificate: "{{ acme_certs_dir }}/{{ umurmur_domain }}.d/{{ acme_enabled | ternary('fullchain', 'cert') }}.pem"
-umurmur_private_key: "{{ acme_keys_dir }}/{{ umurmur_domain }}.pem"
+umurmur_private_key: "{{ acme_keys_dir }}/{{ umurmur_domain }}.key"
 umurmur_version: master
 umurmur_port: 64738