diff --git a/README.md b/README.md
index e3de386..7da4c63 100644
--- a/README.md
+++ b/README.md
@@ -15,6 +15,6 @@ To install the library add:
         maven { url "https://jitpack.io" }
    }
    dependencies {
-         compile 'com.github.webee:java-json-api:v2.0.0'
+         compile 'com.github.webee:java-json-api:v2.1.0'
    }
    ```
\ No newline at end of file
diff --git a/src/main/java/com/github/webee/json/Utils.java b/src/main/java/com/github/webee/json/Utils.java
index cc4d406..fd2bda0 100644
--- a/src/main/java/com/github/webee/json/Utils.java
+++ b/src/main/java/com/github/webee/json/Utils.java
@@ -27,6 +27,10 @@ public static JSONType getType(Object value) {
             return JSONType.Object;
         } else if (value instanceof JSONArray) {
             return JSONType.Array;
+        } else if (value instanceof Map) {
+            return JSONType.Object;
+        } else if (value instanceof Object[]) {
+            return JSONType.Array;
         }
         return null;
     }
@@ -99,24 +103,29 @@ public static Object resolveValue(Object value) {
     }
 
     public static Object resolveValue(Object value, JSONType t) {
-        if (t == null) {
-            if (value instanceof Map) {
-                return Utils.objectToMap((Map<String, Object>) value);
-            } else if (value instanceof Object[]) {
-                return Utils.arrayToObjects((Object[]) value);
+        if (t != null) {
+            switch (t) {
+                case Object:
+                    if (value instanceof JSONObject) {
+                        return Utils.objectToMap((JSONObject) value);
+                    } else if (value instanceof Map) {
+                        return Utils.objectToMap((Map<String, Object>) value);
+                    }
+                    break;
+                case Array:
+                    if (value instanceof JSONArray) {
+                        return Utils.arrayToObjects((JSONArray) value);
+                    } else if (value instanceof Object[]) {
+                        return Utils.arrayToObjects((Object[]) value);
+                    }
+                    break;
+                case Null:
+                    return null;
+                default:
+                    return value;
             }
-            return null;
-        }
-
-        switch (t) {
-            case Object:
-                return Utils.objectToMap((JSONObject) value);
-            case Array:
-                return Utils.arrayToObjects((JSONArray) value);
-            case Null:
-                return null;
-            default:
-                return value;
         }
+        // FIXME: some type should be ignored.
+        return null;
     }
 }