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-rw-r--r--node_modules/node-fetch/lib/headers.js2
1 files changed, 1 insertions, 1 deletions
diff --git a/node_modules/node-fetch/lib/headers.js b/node_modules/node-fetch/lib/headers.js
index fd7a14eaa..af20749b8 100644
--- a/node_modules/node-fetch/lib/headers.js
+++ b/node_modules/node-fetch/lib/headers.js
@@ -35,7 +35,7 @@ function Headers(headers) {
} else if (typeof headers[prop] === 'number' && !isNaN(headers[prop])) {
this.set(prop, headers[prop].toString());
- } else if (headers[prop] instanceof Array) {
+ } else if (Array.isArray(headers[prop])) {
headers[prop].forEach(function(item) {
self.append(prop, item.toString());
});