diff --git a/system/uri.php b/system/uri.php
index ca15f4bf..0db465df 100644
--- a/system/uri.php
+++ b/system/uri.php
@@ -2,7 +2,7 @@
 /**
  * @file uri.php
  * @created_on 2018-04-13
- * @updated_on 2020-04-12
+ * @updated_on 2020-05-21
  * @author Go Namhyeon <gnh1201@gmail.com>
  * @brief URI module
  */
@@ -103,6 +103,7 @@ function read_requests($options=array()) {
             "_RAW"    => file_get_contents("php://input"),
             "_JSON"   => false,
             "_SEAL"   => false,
+            "_YAML"   => false,
             "_CSPT"   => false,
             "_SERVER" => array_map("make_safe_argument", get_array($_SERVER)),
         );
@@ -120,7 +121,7 @@ function read_requests($options=array()) {
             }
         }
 
-        // check if `JSONData` request (referenced from NHBank API competition)
+        // check if `JSONData` request (referenced from `2018 NHBank-KISA-TheLoop API competition`)
         $jsondata = false;
         if(!array_key_empty("JSONData", $requests['_ALL'])) {
             $options['json'] = true;
@@ -129,7 +130,7 @@ function read_requests($options=array()) {
 
         // check if json request
         if(array_key_equals("json", $options, true)) {
-            $jsondata = ($jsondata !== false) ? $jsondata : $requests['_RAW'];
+            $jsondata = ($jsondata !== false) ? $js ondata : $requests['_RAW'];
             $requests['_JSON'] = json_decode($jsondata);
         }
 
@@ -138,6 +139,13 @@ function read_requests($options=array()) {
             $requests['_SEAL'] = unserialize($requests['_RAW']);
         }
         
+        // check if yaml request
+        if(array_key_equals("yaml", $options, true)) {
+            if(is_fn("yaml_parse")) {
+                $requests['_YAML'] = yaml_parse($requests['_RAW']);
+            }
+        }
+
         // check if cspt(catsplit) request
         if(array_key_equals("catsplit", $options, true)) {
             if(loadHelper("catsplit.format")) {