diff --git a/lib/abstract-class.js b/lib/abstract-class.js
index d6fc8e0e..b0cf1655 100644
--- a/lib/abstract-class.js
+++ b/lib/abstract-class.js
@@ -60,9 +60,9 @@ AbstractClass.prototype._initProperties = function (data, applySetters) {
             ))
         });
 
-        if (properties[attr].type.name === 'JSON' && typeof this[_attr] === 'string') {
+        if (properties[attr].type.name === 'JSON' && this[_attr]) {
             try {
-                this[_attr] = JSON.parse(this[_attr]);
+                this[_attr] = JSON.parse(this[_attr] + '');
             } catch (e) { }
         }
 
diff --git a/package.json b/package.json
index e1144f49..ffdfc967 100644
--- a/package.json
+++ b/package.json
@@ -35,7 +35,7 @@
     "redis":         ">= 0.6.7",
     "mongoose":      ">= 2.2.3",
     "mysql":         ">= 0.9.4",
-    "pg":            ">= 0.6.9",
+    "pg":            "latest",
     "sqlite3":       ">= 2.0.18",
     "riak-js":       ">= 0.4.1",
     "neo4j":         ">= 0.2.5",