diff --git a/README.md b/README.md
index 9a49840..9179908 100644
--- a/README.md
+++ b/README.md
@@ -41,8 +41,8 @@ Docker Compose installation options.
 (Used only for Debian/Ubuntu.) You can switch the channel to `edge` if you want to use the Edge release.
 
     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_repo_enable_edge: '0'
+    docker_yum_repo_enable_test: '0'
 
 (Used only for RedHat/CentOS.) You can enable the Edge or Test repo by setting the respective vars to `1`.
 
diff --git a/defaults/main.yml b/defaults/main.yml
index 3a9cc47..5f670c6 100644
--- a/defaults/main.yml
+++ b/defaults/main.yml
@@ -22,8 +22,8 @@ docker_apt_ignore_key_error: true
 
 # 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_repo_enable_edge: '0'
+docker_yum_repo_enable_test: '0'
 
 # A list of users who will be added to the docker group.
 docker_users: []