diff --git a/api/src/org/apache/cloudstack/api/response/FirewallResponse.java b/api/src/org/apache/cloudstack/api/response/FirewallResponse.java
index 4c1342a7ecb..368f732b197 100644
--- a/api/src/org/apache/cloudstack/api/response/FirewallResponse.java
+++ b/api/src/org/apache/cloudstack/api/response/FirewallResponse.java
@@ -37,11 +37,11 @@ public class FirewallResponse extends BaseResponse {
 
     @SerializedName(ApiConstants.START_PORT)
     @Param(description = "the starting port of firewall rule's port range")
-    private String startPort;
+    private Integer startPort;
 
     @SerializedName(ApiConstants.END_PORT)
     @Param(description = "the ending port of firewall rule's port range")
-    private String endPort;
+    private Integer endPort;
 
     @SerializedName(ApiConstants.IP_ADDRESS_ID)
     @Param(description = "the public ip address id for the firewall rule")