diff --git a/README.md b/README.md
index b556ba9..036b560 100644
--- a/README.md
+++ b/README.md
@@ -35,17 +35,25 @@ Docker Compose installation options.
 
     docker_apt_release_channel: stable
     docker_apt_arch: amd64
-    docker_apt_repository: "deb [arch={{ docker_apt_arch }}] https://download.docker.com/linux/{{ ansible_distribution|lower }} {{ ansible_distribution_release }} {{ docker_apt_release_channel }}"
+    docker_apt_repository: "deb [arch={{ docker_apt_arch }}] https://download.docker.com/linux/{{ ansible_distribution | lower }} {{ ansible_distribution_release }} {{ docker_apt_release_channel }}"
     docker_apt_ignore_key_error: True
+    docker_apt_gpg_key: https://download.docker.com/linux/{{ ansible_distribution | lower }}/gpg
 
 (Used only for Debian/Ubuntu.) You can switch the channel to `edge` if you want to use the Edge release.
 
+You can change `docker_apt_gpg_key` to a different url if you are behind a firewall or provide a trustworthy mirror.
+Usually in combination with changing `docker_apt_repository` as well.
+
     docker_yum_repo_url: https://download.docker.com/linux/centos/docker-{{ docker_edition }}.repo
     docker_yum_repo_enable_edge: '0'
     docker_yum_repo_enable_test: '0'
+    docker_yum_gpg_key: https://download.docker.com/linux/centos/gpg
 
 (Used only for RedHat/CentOS.) You can enable the Edge or Test repo by setting the respective vars to `1`.
 
+You can change `docker_yum_gpg_key` to a different url if you are behind a firewall or provide a trustworthy mirror.
+Usually in combination with changing `docker_yum_repository` as well.
+
     docker_users:
       - user1
       - user2
diff --git a/defaults/main.yml b/defaults/main.yml
index c71fbed..ba5ba8a 100644
--- a/defaults/main.yml
+++ b/defaults/main.yml
@@ -17,13 +17,15 @@ docker_compose_path: /usr/local/bin/docker-compose
 # Used only for Debian/Ubuntu. Switch 'stable' to 'edge' if needed.
 docker_apt_release_channel: stable
 docker_apt_arch: amd64
-docker_apt_repository: "deb [arch={{ docker_apt_arch }}] https://download.docker.com/linux/{{ ansible_distribution|lower }} {{ ansible_distribution_release }} {{ docker_apt_release_channel }}"
+docker_apt_repository: "deb [arch={{ docker_apt_arch }}] https://download.docker.com/linux/{{ ansible_distribution | lower }} {{ ansible_distribution_release }} {{ docker_apt_release_channel }}"
 docker_apt_ignore_key_error: true
+docker_apt_gpg_key: https://download.docker.com/linux/{{ ansible_distribution | lower }}/gpg
 
 # Used only for RedHat/CentOS/Fedora.
 docker_yum_repo_url: https://download.docker.com/linux/{{ (ansible_distribution == "Fedora") | ternary("fedora","centos") }}/docker-{{ docker_edition }}.repo
 docker_yum_repo_enable_edge: '0'
 docker_yum_repo_enable_test: '0'
+docker_yum_gpg_key: https://download.docker.com/linux/centos/gpg
 
 # A list of users who will be added to the docker group.
 docker_users: []
diff --git a/tasks/setup-Debian.yml b/tasks/setup-Debian.yml
index 21dc204..b106944 100644
--- a/tasks/setup-Debian.yml
+++ b/tasks/setup-Debian.yml
@@ -16,7 +16,7 @@
 
 - name: Add Docker apt key.
   apt_key:
-    url: https://download.docker.com/linux/ubuntu/gpg
+    url: "{{ docker_apt_gpg_key }}"
     id: 9DC858229FC7DD38854AE2D88D81803C0EBFCD88
     state: present
   register: add_repository_key
@@ -28,7 +28,7 @@
 
 - name: Add Docker apt key (alternative for older systems without SNI).
   shell: >
-    curl -sSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -
+    curl -sSL {{ docker_apt_gpg_key }}  | sudo apt-key add -
   args:
     warn: false
   when: add_repository_key is failed
diff --git a/tasks/setup-RedHat.yml b/tasks/setup-RedHat.yml
index df15519..800c0bc 100644
--- a/tasks/setup-RedHat.yml
+++ b/tasks/setup-RedHat.yml
@@ -9,7 +9,7 @@
 
 - name: Add Docker GPG key.
   rpm_key:
-    key: https://download.docker.com/linux/centos/gpg
+    key: "{{ docker_yum_gpg_key }}"
     state: present
 
 - name: Add Docker repository.