diff --git a/package-lock.json b/package-lock.json
index afb6c75..80cf5db 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,6 +1,6 @@
 {
   "name": "node-fetch-cookies",
-  "version": "1.1.0",
+  "version": "1.1.1",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
diff --git a/package.json b/package.json
index a7cb486..860a563 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "node-fetch-cookies",
-  "version": "1.1.0",
+  "version": "1.1.1",
   "description": "node-fetch wrapper that adds support for cookie-jars",
   "main": "src/index.mjs",
   "engines": {
diff --git a/src/index.mjs b/src/index.mjs
index c339f0c..fe56b98 100644
--- a/src/index.mjs
+++ b/src/index.mjs
@@ -16,6 +16,7 @@ async function cookieFetch(cookieJars, url, options) {
         domains
             .map(d => [...jar.iterValidForRequest(d, url)])
             .reduce((a, b) => [...a, ...b])
+            .filter((v, i, a) => a.slice(0, i).every(c => c.name !== v.name)) //unique
             .forEach(c => cookies += c.serialize() + "; ");
     if(cookieJars) {
         if(Array.isArray(cookieJars) && cookieJars.every(c => c instanceof CookieJar)) {