diff --git a/.travis.yml b/.travis.yml
index cb2d39c7..f2cee127 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,5 +1,6 @@
 language: node_js
 node_js:
+- '4'
 - '6'
 - '7'
 - '8'
diff --git a/src/db/utils.ts b/src/db/utils.ts
index 5e57510b..56dd014d 100644
--- a/src/db/utils.ts
+++ b/src/db/utils.ts
@@ -13,7 +13,7 @@ async function fileExists(pth: string) {
 
 const copyFile = (src: string, dst: string) =>
   new Promise((resolve, reject) => {
-    fs.copyFile(src, dst, err => {
+    fs.copy(src, dst, err => {
       if (err) {
         reject(err);
       } else {