diff --git a/index.js b/index.js
index 7f87890..2ee067d 100644
--- a/index.js
+++ b/index.js
@@ -94,6 +94,9 @@ class Yoke extends EventEmitter {
       for (let i = 0; i < size; i++) {
         const provider = url.parse(decodeURIComponent(children[i]));
         const queryObj = qs.parse(provider.query);
+        if (!queryObj.version && queryObj['default.version']) {
+          queryObj.version = queryObj['default.version']
+        }
         if (
           queryObj.version === depVal.version &&
           queryObj.group === depVal.group &&
diff --git a/libs/service.js b/libs/service.js
index 2791658..3425f2a 100644
--- a/libs/service.js
+++ b/libs/service.js
@@ -41,12 +41,12 @@ class Service {
         if (this.mdsig[method]) {
           args = this.mdsig[method](...args);
         }
-        return new Promise((resolve, reject) => this.execute(method, args, resolve, reject));
+        return new Promise((resolve, reject) => this._execute(method, args, resolve, reject));
       };
     }
   }
 
-  execute(method, args, resolve, reject) {
+  _execute(method, args, resolve, reject) {
     const attach = Object.assign({}, this.encodeParam, {
       _method: method,
       _args: args