diff --git a/roles/nginx/defaults/main.yml b/roles/nginx/defaults/main.yml
index 7d8ebc1..eff3641 100644
--- a/roles/nginx/defaults/main.yml
+++ b/roles/nginx/defaults/main.yml
@@ -32,7 +32,7 @@ nginx_version: mainline
 
 # Dependencies of certbot-auto on Ubuntu 16.04 "xenial"
 # taken after running certbot-auto on a clean install
-letsencrypt_ubuntu_xenial_deps:
+letsencrypt_deps_ubuntu_xenial:
   - augeas-doc
   - augeas-tools
   - binutils
@@ -72,7 +72,7 @@ letsencrypt_ubuntu_xenial_deps:
 
 # Dependencies of certbot-auto on Ubuntu 18.04 "bionic"
 # taken after running certbot-auto on a clean install
-letsencrypt_ubuntu_bionic_deps:
+letsencrypt_deps_ubuntu_bionic:
   - augeas-lenses
   - binutils
   - binutils-common
@@ -117,7 +117,7 @@ letsencrypt_ubuntu_bionic_deps:
 
 # Dependencies of certbot-auto on Debian 9 "stretch"
 # taken after running certbot-auto on a clean install
-letsencrypt_debian_stretch_deps:
+letsencrypt_deps_debian_stretch:
   - augeas-doc
   - augeas-tools
   - autoconf
diff --git a/roles/nginx/tasks/letsencrypt.yml b/roles/nginx/tasks/letsencrypt.yml
index 5f8173d..28dfab7 100644
--- a/roles/nginx/tasks/letsencrypt.yml
+++ b/roles/nginx/tasks/letsencrypt.yml
@@ -19,21 +19,21 @@
 
 - name: Install certbot dependencies (Ubuntu 16.04)
   when: ansible_distribution == 'Ubuntu' and ansible_distribution_version is version_compare('16.04', '==')
-  apt: name={{ letsencrypt_ubuntu_xenial_deps }} state=present update_cache=yes
+  apt: name={{ letsencrypt_deps_ubuntu_xenial }} state=present update_cache=yes
   tags:
     - packages
     - letsencrypt
 
 - name: Install certbot dependencies (Ubuntu 18.04)
   when: ansible_distribution == 'Ubuntu' and ansible_distribution_version is version_compare('18.04', '==')
-  apt: name={{ letsencrypt_ubuntu_bionic_deps }} state=present update_cache=yes
+  apt: name={{ letsencrypt_deps_ubuntu_bionic }} state=present update_cache=yes
   tags:
     - packages
     - letsencrypt
 
 - name: Install certbot dependencies (Debian 9)
   when: ansible_distribution == 'Debian' and ansible_distribution_major_version is version_compare('9', '==')
-  apt: name={{ letsencrypt_debian_stretch_deps }} state=present update_cache=yes
+  apt: name={{ letsencrypt_deps_debian_stretch }} state=present update_cache=yes
   tags:
     - packages
     - letsencrypt