diff --git a/src/main/java/com/amihaiemil/zold/RtWallet.java b/src/main/java/com/amihaiemil/zold/RtWallet.java
index 9162618..187db3c 100644
--- a/src/main/java/com/amihaiemil/zold/RtWallet.java
+++ b/src/main/java/com/amihaiemil/zold/RtWallet.java
@@ -92,19 +92,17 @@ public String getId() throws IOException {
     }
 
     @Override
-    public double balance() throws IOException{
+    public String balance() throws IOException{
         final HttpGet walletBalance = new HttpGet(
             URI.create(this.baseUri.toString() + "/balance")
         );
         try {
-            return Double.parseDouble(
-                this.client.execute(
-                    walletBalance,
-                    new ReadString(
-                        new MatchStatus(
-                            walletBalance.getURI(),
-                            HttpStatus.SC_OK
-                        )
+            return this.client.execute(
+                walletBalance,
+                new ReadString(
+                    new MatchStatus(
+                        walletBalance.getURI(),
+                        HttpStatus.SC_OK
                     )
                 )
             );
@@ -116,7 +114,7 @@ public double balance() throws IOException{
     @Override
     public void pay(
         final String keygap, final String user,
-        final double amount, final String details
+        final String amount, final String details
     ) throws IOException {
         
         final HttpPost request = new HttpPost(
diff --git a/src/main/java/com/amihaiemil/zold/Wallet.java b/src/main/java/com/amihaiemil/zold/Wallet.java
index 9a8da59..1b2a143 100644
--- a/src/main/java/com/amihaiemil/zold/Wallet.java
+++ b/src/main/java/com/amihaiemil/zold/Wallet.java
@@ -49,7 +49,7 @@ public interface Wallet {
     * @return Balance
     * @throws IOException If there's a networking problem.
     */
-    double balance() throws IOException;
+    String balance() throws IOException;
 
     /**
     * Pay to another wallet.
@@ -62,7 +62,7 @@ public interface Wallet {
     */
     void pay(
         final String keygap, final String user,
-        final double amount, final String details
+        final String amount, final String details
     )throws IOException;
 
     /**