diff --git a/README.md b/README.md
index 12c1eff..af12a69 100644
--- a/README.md
+++ b/README.md
@@ -6,7 +6,8 @@ Installs Ruby and bundler gem on Linux.
 
 ## Requirements
 
-None.
+If you are running this role with `ansible-core`, install the
+`community.general` collection first so the `gem` module is available.
 
 ## Role Variables
 
diff --git a/tasks/main.yml b/tasks/main.yml
index e73f56e..4345170 100644
--- a/tasks/main.yml
+++ b/tasks/main.yml
@@ -30,14 +30,14 @@
 
 # Install Bundler and configured gems.
 - name: Install Bundler.
-  gem:
+  community.general.gem:
     name: bundler
     state: present
     user_install: false
   when: ruby_install_bundler
 
 - name: Install configured gems.
-  gem:
+  community.general.gem:
     name: "{{ item.name | default(item) }}"
     version: "{{ item.version | default(omit) }}"
     user_install: "{{ item.user_install | default(omit) }}"