diff --git a/CHANGELOG.md b/CHANGELOG.md
index e1ea40c5..41287ab8 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -17,6 +17,7 @@ The **patch** part changes incrementally at each release.
 
 ### Changed
 * rbenv: install Ruby 2.5.1 by default
+* rbenv: switch from copy to lineinfile for default gems
 
 ### Fixed
 
diff --git a/rbenv/files/default-gems b/rbenv/files/default-gems
deleted file mode 100644
index b841526f..00000000
--- a/rbenv/files/default-gems
+++ /dev/null
@@ -1 +0,0 @@
-bundler
diff --git a/rbenv/tasks/main.yml b/rbenv/tasks/main.yml
index 65df5302..693ff0f6 100644
--- a/rbenv/tasks/main.yml
+++ b/rbenv/tasks/main.yml
@@ -39,12 +39,16 @@
   tags:
     - rbenv
 
-  copy:
-    src: default-gems
 - name: "default gems are installed for {{ username }}"
+  lineinfile:
     dest: '{{ rbenv_root }}/default-gems'
+    line: "{{ item }}"
     owner: '{{ username }}'
     group: '{{ username }}'
+    create: yes
+  with_items: '{{ rbenv_default_gems }}'
+  become_user: "{{ username }}"
+  become: yes
   tags:
     - rbenv