diff --git a/tiny-json.c b/tiny-json.c
index 795715c..088849a 100644
--- a/tiny-json.c
+++ b/tiny-json.c
@@ -287,11 +287,13 @@ static char* numValue( char* ptr, json_t* property ) {
     if ( JSON_INTEGER == property->type ) {
         char const* value = property->u.value;
         bool const negative = *value == '-';
-        static char const min[] = "-9223372036854775808";
-        static char const max[] = "9223372036854775807";
+        static char const min[] = "-9223372036854775808"; // min int64_t
+        static char const max[] = "18446744073709551615"; // max uint64_t
         unsigned int const maxdigits = ( negative? sizeof min: sizeof max ) - 1;
         unsigned int const len = ( unsigned int const ) ( ptr - value );
         if ( len > maxdigits ) return 0;
+        if ( negative == 0 )
+            property->type = JSON_UINTEGER;
         if ( len == maxdigits ) {
             char const tmp = *ptr;
             *ptr = '\0';
diff --git a/tiny-json.h b/tiny-json.h
index 2b527e7..bb20911 100644
--- a/tiny-json.h
+++ b/tiny-json.h
@@ -48,7 +48,7 @@ extern "C" {
 /** Enumeration of codes of supported JSON properties types. */
 typedef enum {
     JSON_OBJ, JSON_ARRAY, JSON_TEXT, JSON_BOOLEAN,
-    JSON_INTEGER, JSON_REAL, JSON_NULL
+    JSON_INTEGER, JSON_UINTEGER, JSON_REAL, JSON_NULL
 } jsonType_t;
 
 /** Structure to handle JSON properties. */
@@ -137,12 +137,21 @@ static inline bool json_getBoolean( json_t const* property ) {
 }
 
 /** Get the value of a json integer property.
-  * @param property A valid handler of a json object. Its type must be JSON_INTEGER.
+  * @param property A valid handler of a json object. Its type must be JSON_INTEGER or JSON_UINTEGER.
+  * @warning If the data type is JSON_UINTEGER and the value is greater than INT64_MAX,
+  *          this function will not generate the correct value.
   * @return The value stdint. */
 static inline int64_t json_getInteger( json_t const* property ) {
   return strtoll( property->u.value,(char**)NULL, 10);
 }
 
+/** Get the value of a json unsigned integer property.
+  * @param property A valid handler of a json object. Its type must be JSON_UINTEGER.
+  * @return The value stdint. */
+static inline uint64_t json_getUinteger( json_t const* property ) {
+  return strtoull( property->u.value,(char**)NULL, 10);
+}
+
 /** Get the value of a json real property.
   * @param property A valid handler of a json object. Its type must be JSON_REAL.
   * @return The value. */