diff --git a/README.md b/README.md
index 5f1d7f1..5d3df6e 100644
--- a/README.md
+++ b/README.md
@@ -32,9 +32,9 @@ Accelize DRM systemd service configuration.
 
 DRM Configuration:
 Accelize DRM configuration files.
-* **accelize_drm_cred_src**: Path to the local `cred.json` file to transfer to the host. Default to `cred.json`.
+* **accelize_drm_cred_src**: Path to the local `cred.json` file to transfer to the host. If not specified, does not transfer file.
 * **accelize_drm_cred_dst**: Destination path of the `cred.json` file on the target host. Default to `/root/.accelize_drm/cred.json`.
-* **accelize_drm_conf_src**: Path to the local `conf.json` file to transfer to the host. Default to `conf.json`.
+* **accelize_drm_conf_src**: Path to the local `conf.json` file to transfer to the host. If not specified, does not transfer file.
 * **accelize_drm_conf_dst**: Destination path of the `conf.json` file on the target host. Default to `/etc/accelize_drm/conf.json`.
 
 Source installation, test & build requirements:
diff --git a/defaults/main.yml b/defaults/main.yml
index 10719a6..70dba76 100644
--- a/defaults/main.yml
+++ b/defaults/main.yml
@@ -8,9 +8,7 @@ accelize_repository_channel: stable
 accelize_drm_from_source: false
 
 # Accelize DRM credential and configuration files
-accelize_drm_cred_src: cred.json
 accelize_drm_cred_dst: /root/.accelize_drm/cred.json
-accelize_drm_conf_src: conf.json
 accelize_drm_conf_dst: /etc/accelize_drm/conf.json
 
 # FPGA driver to use with Accelize DRM service
diff --git a/tasks/main.yml b/tasks/main.yml
index 8037d40..a218bd5 100644
--- a/tasks/main.yml
+++ b/tasks/main.yml
@@ -324,21 +324,25 @@
   file:
     path: "{{ accelize_drm_cred_dst | dirname }}"
     state: directory
+  when: accelize_drm_cred_src is defined
 
 - name: Create Accelize DRM credentials file
   copy:
     src: "{{ accelize_drm_cred_src }}"
     dest: "{{ accelize_drm_cred_dst }}"
+  when: accelize_drm_cred_src is defined
 
 - name: Ensure Accelize DRM configuration parent directory exists
   file:
     path: "{{ accelize_drm_conf_dst | dirname }}"
     state: directory
+  when: accelize_drm_conf_src is defined
 
 - name: Create Accelize DRM configuration file
   copy:
     src: "{{ accelize_drm_conf_src }}"
     dest: "{{ accelize_drm_conf_dst }}"
+  when: accelize_drm_conf_src is defined
 
 - name: Ensure Accelize DRM service parent directory exists
   file: