diff --git a/examples/spec/twilio_api_v2010.yaml b/examples/spec/twilio_api_v2010.yaml
index 394bb45c3..d502d8879 100644
--- a/examples/spec/twilio_api_v2010.yaml
+++ b/examples/spec/twilio_api_v2010.yaml
@@ -273,11 +273,11 @@ paths:
       dependentProperties:
         address:
           mapping:
-            - account_sid: sid
+            account_sid: sid
           resource_url: /Accounts/{account_sid}/Addresses.json
         application:
           mapping:
-            - account_sid: sid
+            account_sid: sid
           resource_url: /Accounts/{account_sid}/Applications.json
   /2010-04-01/Accounts/{Sid}.json:
     description: A top-level resource instance
@@ -420,8 +420,8 @@ paths:
       dependentProperties:
         address:
           mapping:
-            - account_sid: account_sid
-              test_call_sid: sid
+            account_sid: account_sid
+            test_call_sid: sid
           resource_url: Accounts/{account_sid}/Addresses/{test_call_sid}/Test.json
       pathType: list
   /2010-04-01/Accounts/{AccountSid}/Calls/{TestInteger}.json:
diff --git a/src/main/java/com/twilio/oai/api/RubyApiResourceBuilder.java b/src/main/java/com/twilio/oai/api/RubyApiResourceBuilder.java
index ed7132b34..63ae7cabb 100644
--- a/src/main/java/com/twilio/oai/api/RubyApiResourceBuilder.java
+++ b/src/main/java/com/twilio/oai/api/RubyApiResourceBuilder.java
@@ -164,7 +164,7 @@ private Map<String, String> mapOperationsDependents(CodegenOperation operation){
             for(Map.Entry<String, LinkedHashMap<String, Object>> propertiesDetails : dependentProperties.entrySet()){
                 String mountName = propertiesDetails.getKey();
                 dependentParams = "";
-                LinkedHashMap<String, String> mapping = ((List<LinkedHashMap<String, String>>)propertiesDetails.getValue().get("mapping")).get(0);
+                LinkedHashMap<String, String> mapping = (LinkedHashMap<String, String>)propertiesDetails.getValue().get("mapping");
                 if(!seenParams.contains(mountName)) {
                     for (Map.Entry<String, String> mappingEntry : mapping.entrySet()) {
                         String dependent = mappingEntry.getKey() + ": @solution[:" + mappingEntry.getValue()+ "], ";