diff --git a/lib/address.js b/lib/address.js
index 815efde..e56c429 100644
--- a/lib/address.js
+++ b/lib/address.js
@@ -313,7 +313,7 @@ Address.fromString = function(str, network, type) {
  * @returns {Address} A new valid instance of an Address
  */
 Address.fromJSON = function fromJSON(json) {
-  if (JSUtil.isValidJson(json)) {
+  if (JSUtil.isValidJSON(json)) {
     json = JSON.parse(json);
   }
   var hashBuffer = new Buffer(json.hash, 'hex');
diff --git a/lib/unit.js b/lib/unit.js
index daad5c8..dc6bb74 100644
--- a/lib/unit.js
+++ b/lib/unit.js
@@ -63,7 +63,7 @@ Object.keys(UNITS).forEach(function(key) {
  * @returns {Unit} A Unit instance
  */
 Unit.fromJSON = function fromJSON(json){
-  if (JSUtil.isValidJson(json)) {
+  if (JSUtil.isValidJSON(json)) {
     json = JSON.parse(json);
   }
   return new Unit(json.amount, json.code);
diff --git a/lib/uri.js b/lib/uri.js
index 3219445..8013cf7 100644
--- a/lib/uri.js
+++ b/lib/uri.js
@@ -68,7 +68,7 @@ URI.fromString = function fromString(str) {
  * @returns {URI} A new instance of a URI
  */
 URI.fromJSON = function fromJSON(json) {
-  if (JSUtil.isValidJson(json)) {
+  if (JSUtil.isValidJSON(json)) {
     json = JSON.parse(json);
   }
   return new URI(json);