From acb725beb9486fd70e28c97abcb75b5c11005895 Mon Sep 17 00:00:00 2001
From: Rhys Arkins <rhys@arkins.net>
Date: Tue, 27 Mar 2018 16:25:06 +0200
Subject: [PATCH] fix: stringify currentVersion before trim

---
 lib/manager/npm/extract.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/manager/npm/extract.js b/lib/manager/npm/extract.js
index 6d9db6c5b1..1f01c9d4e7 100644
--- a/lib/manager/npm/extract.js
+++ b/lib/manager/npm/extract.js
@@ -15,7 +15,7 @@ function extractDependencies(packageJson, config) {
   return depNames
     .map(depName => {
       const currentVersion = packageJson[depType][depName]
-        ? packageJson[depType][depName].trim().replace(/^=/, '')
+        ? `${packageJson[depType][depName]}`.trim().replace(/^=/, '')
         : undefined;
       let lockedVersion;
       try {
-- 
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