diff --git a/examples/JSONObject/JSONObject.ino b/examples/JSONObject/JSONObject.ino
index 786185a..157ab8d 100644
--- a/examples/JSONObject/JSONObject.ino
+++ b/examples/JSONObject/JSONObject.ino
@@ -8,6 +8,7 @@
 */
 
 #include <Arduino_JSON.h>
+#include <assert.h>
 
 const char input[] = "{\"result\":true,\"count\":42,\"foo\":\"bar\"}";
 
@@ -78,7 +79,19 @@ void demoCreation() {
 
   myObject["hello"] = "world";
   myObject["true"] = true;
-  myObject["x"] = 42;
+
+  myObject["x1"] = (int) 42;
+  myObject["x2"] = (long) 42;
+  myObject["x3"] = (unsigned long) 42;
+
+  int x1 = myObject["x1"];
+  assert(x1 == 42);
+  
+  long x2 = myObject["x2"];
+  assert(x2 == 42);
+
+  unsigned long x3 = myObject["x3"];
+  assert(x3 == 42);
 
   Serial.print("myObject.keys() = ");
   Serial.println(myObject.keys());
diff --git a/src/JSONVar.cpp b/src/JSONVar.cpp
index 247fcc3..8adc085 100644
--- a/src/JSONVar.cpp
+++ b/src/JSONVar.cpp
@@ -142,6 +142,11 @@ JSONVar::operator long() const
   return cJSON_IsNumber(_json) ? _json->valueint : 0;
 }
 
+JSONVar::operator unsigned long() const
+{
+  return cJSON_IsNumber(_json) ? _json->valueint : 0;
+}
+
 JSONVar::operator double() const
 {
   return cJSON_IsNumber(_json) ? _json->valuedouble : NAN;
diff --git a/src/JSONVar.h b/src/JSONVar.h
index 58a7213..0bf71f0 100644
--- a/src/JSONVar.h
+++ b/src/JSONVar.h
@@ -49,6 +49,7 @@ class JSONVar : public Printable {
   operator bool() const;
   operator int() const;
   operator long() const;
+  operator unsigned long() const;
   operator double() const;
   operator const char*() const;