diff --git a/src/main/java/org/leolo/nrapi/util/MiscUtilAPI.java b/src/main/java/org/leolo/nrapi/util/MiscUtilAPI.java
index be6725d..1f70af5 100644
--- a/src/main/java/org/leolo/nrapi/util/MiscUtilAPI.java
+++ b/src/main/java/org/leolo/nrapi/util/MiscUtilAPI.java
@@ -153,6 +153,7 @@ public class MiscUtilAPI {
             }
         }
         sb.append("}");
+        sb.append(",\"api-version\":\"0.1\"");
         sb.append("}");
         String result = "";
         try(