diff --git a/src/main/java/synapticloop/linode/api/response/AccountEstimateInvoiceResponse.java b/src/main/java/synapticloop/linode/api/response/AccountEstimateInvoiceResponse.java
index d4a0fda..6e2a560 100644
--- a/src/main/java/synapticloop/linode/api/response/AccountEstimateInvoiceResponse.java
+++ b/src/main/java/synapticloop/linode/api/response/AccountEstimateInvoiceResponse.java
@@ -36,11 +36,8 @@ public AccountEstimateInvoiceResponse(JSONObject jsonObject) throws ApiException
 
 		if(!hasErrors()) {
 			JSONObject dataObject = jsonObject.getJSONObject(JSON_KEY_DATA);
-			this.invoiceTo = ResponseHelper.convertDate(dataObject.getString(JSON_KEY_INVOICE_TO));
-			dataObject.remove(JSON_KEY_INVOICE_TO);
-
-			this.amount = dataObject.getDouble(JSON_KEY_AMOUNT);
-			dataObject.remove(JSON_KEY_AMOUNT);
+			this.invoiceTo = readDate(dataObject, JSON_KEY_INVOICE_TO);
+			this.amount = readDouble(dataObject, JSON_KEY_AMOUNT);
 
 			ResponseHelper.warnOnMissedKeys(LOGGER, dataObject);
 		}
diff --git a/src/main/java/synapticloop/linode/api/response/AccountInfoResponse.java b/src/main/java/synapticloop/linode/api/response/AccountInfoResponse.java
index fc7c4e5..18d47ad 100644
--- a/src/main/java/synapticloop/linode/api/response/AccountInfoResponse.java
+++ b/src/main/java/synapticloop/linode/api/response/AccountInfoResponse.java
@@ -54,20 +54,14 @@ public AccountInfoResponse(JSONObject jsonObject) throws ApiException {
 
 		if(!hasErrors()) {
 			JSONObject dataObject = jsonObject.getJSONObject(JSON_KEY_DATA);
-			this.activeSince = ResponseHelper.convertDate(dataObject.getString("ACTIVE_SINCE"));
-			dataObject.remove("ACTIVE_SINCE");
-			this.transferPool = dataObject.getLong("TRANSFER_POOL");
-			dataObject.remove("TRANSFER_POOL");
-			this.transferUsed = dataObject.getLong("TRANSFER_USED");
-			dataObject.remove("TRANSFER_USED");
-			this.transferBillable = dataObject.getLong("TRANSFER_BILLABLE");
-			dataObject.remove("TRANSFER_BILLABLE");
-			this.isManaged = dataObject.getBoolean("MANAGED");
-			dataObject.remove("MANAGED");
-			this.billingMethod = dataObject.getString("BILLING_METHOD");
-			dataObject.remove("BILLING_METHOD");
-			this.balance = dataObject.getLong("BALANCE");
-			dataObject.remove("BALANCE");
+
+			this.activeSince = readDate(dataObject, JSON_KEY_ACTIVE_SINCE);
+			this.transferPool = readLong(dataObject, JSON_KEY_TRANSFER_POOL);
+			this.transferUsed = readLong(dataObject, JSON_KEY_TRANSFER_USED);
+			this.transferBillable = readLong(dataObject, JSON_KEY_TRANSFER_BILLABLE);
+			this.isManaged = readBoolean(dataObject, JSON_KEY_MANAGED);
+			this.billingMethod = readString(dataObject, JSON_KEY_BILLING_METHOD);
+			this.balance = readLong(dataObject, JSON_KEY_BALANCE);
 
 			ResponseHelper.warnOnMissedKeys(LOGGER, dataObject);
 		}
diff --git a/src/main/java/synapticloop/linode/api/response/ApiSpecResponse.java b/src/main/java/synapticloop/linode/api/response/ApiSpecResponse.java
index ac4ecb5..f1ebc4a 100644
--- a/src/main/java/synapticloop/linode/api/response/ApiSpecResponse.java
+++ b/src/main/java/synapticloop/linode/api/response/ApiSpecResponse.java
@@ -78,8 +78,8 @@ public ApiSpecResponse(JSONObject jsonObject) {
 		jsonObject.remove(JSON_KEY_DATA);
 
 		ResponseHelper.warnOnMissedKeys(LOGGER, jsonObject);
-
 	}
+
 	public List<Method> getMethods() {
 		return this.methods;
 	}
diff --git a/src/main/java/synapticloop/linode/api/response/BaseResponse.java b/src/main/java/synapticloop/linode/api/response/BaseResponse.java
index 3a32a1d..04d20a6 100644
--- a/src/main/java/synapticloop/linode/api/response/BaseResponse.java
+++ b/src/main/java/synapticloop/linode/api/response/BaseResponse.java
@@ -37,6 +37,14 @@ public abstract class BaseResponse extends BaseJsonReader {
 	protected static final String JSON_KEY_METHODS = "METHODS";
 	protected static final String JSON_KEY_INVOICE_TO = "INVOICE_TO";
 	protected static final String JSON_KEY_AMOUNT = "AMOUNT";
+	protected static final String JSON_KEY_BALANCE = "BALANCE";
+	protected static final String JSON_KEY_BILLING_METHOD = "BILLING_METHOD";
+	protected static final String JSON_KEY_MANAGED = "MANAGED";
+	protected static final String JSON_KEY_TRANSFER_BILLABLE = "TRANSFER_BILLABLE";
+	protected static final String JSON_KEY_TRANSFER_USED = "TRANSFER_USED";
+	protected static final String JSON_KEY_TRANSFER_POOL = "TRANSFER_POOL";
+	protected static final String JSON_KEY_ACTIVE_SINCE = "ACTIVE_SINCE";
+
 
 	private final JSONObject jsonObject;