diff --git a/lib/index.js b/lib/index.js
index cfbc678..26ed3ce 100644
--- a/lib/index.js
+++ b/lib/index.js
@@ -328,14 +328,14 @@ class Client {
     Joi.assert(target, Joi.string().required(), 'Must specify target')
     Joi.assert(params, Joi.object().pattern(/.*/, Joi.string()), 'Specify valid params')
 
+    const qs = Querystring.stringify(
+      Object.assign(
+        { target: target },
+        params
+      )
+    )
     return this._axios.post(
-            `/api/repos/${owner}/${repo}/builds/${number}/promote`,
-            Querystring.stringify(
-              Object.assign(
-                { target: target },
-                params
-              )
-            )
+            `/api/repos/${owner}/${repo}/builds/${number}/promote?${qs}`
     )
   }
 
@@ -354,14 +354,14 @@ class Client {
     Joi.assert(target, Joi.string().required(), 'Must specify target')
     Joi.assert(params, Joi.object().pattern(/.*/, Joi.string()), 'Specify valid params')
 
+    const qs = Querystring.stringify(
+      Object.assign(
+        { target: target },
+        params
+      )
+    )
     return this._axios.post(
-            `/api/repos/${owner}/${repo}/builds/${number}/rollback`,
-            Querystring.stringify(
-              Object.assign(
-                { target: target },
-                params
-              )
-            )
+            `/api/repos/${owner}/${repo}/builds/${number}/rollback/${qs}`
     )
   }