diff --git a/CHANGELOG.md b/CHANGELOG.md
index 975a51fa..1c98f236 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -34,6 +34,10 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 - #342: Email notifications must honor the date format value.
 - #370: AJAX Error: SyntaxError: Unexpected token < in JSON at position 0
 
+### Deprecated
+
+- The availabilities generation and AJAX endpoints will change with a future release.
+
 ## [1.2.1] - 2017-05-21
 
 ### Changed
diff --git a/src/application/controllers/Appointments.php b/src/application/controllers/Appointments.php
index b89968bc..d4419bbc 100755
--- a/src/application/controllers/Appointments.php
+++ b/src/application/controllers/Appointments.php
@@ -317,6 +317,8 @@ class Appointments extends CI_Controller {
      * is managing an already booked appointment or not.
      *
      * Outputs a JSON string with the availabilities.
+     *
+     * @deprecated Since v1.3.0, this method will be replaced with a future release.
      */
     public function ajax_get_available_hours()
     {
@@ -591,6 +593,8 @@ class Appointments extends CI_Controller {
      * must have the Y-m-d format.
      *
      * Outputs a JSON string with the unavailable dates. that are unavailable.
+     *
+     * @deprecated Since v1.3.0, this method will be replaced with a future release.
      */
     public function ajax_get_unavailable_dates()
     {