diff --git a/lib/client.js b/lib/client.js
index 48c5a3da..94e1879b 100644
--- a/lib/client.js
+++ b/lib/client.js
@@ -115,6 +115,8 @@ function authorizationParams(params) {
       delete authParams[key];
     } else if (key === 'claims' && typeof value === 'object') {
       authParams[key] = JSON.stringify(value);
+    } else if (key === 'resource' && Array.isArray(value)) {
+      authParams[key] = value;
     } else if (typeof value !== 'string') {
       authParams[key] = String(value);
     }
diff --git a/test/client/client_instance.test.js b/test/client/client_instance.test.js
index 64a48d00..44b94d65 100644
--- a/test/client/client_instance.test.js
+++ b/test/client/client_instance.test.js
@@ -132,6 +132,14 @@ describe('Client', () => {
       });
     });
 
+    it('allows resource to passed as an array', function () {
+      expect(url.parse(this.client.authorizationUrl({
+        resource: ['urn:example:com', 'urn:example-2:com'],
+      }), true).query).to.deep.contain({
+        resource: ['urn:example:com', 'urn:example-2:com'],
+      });
+    });
+
     it('auto-stringifies claims parameter', function () {
       expect(url.parse(this.client.authorizationUrl({
         claims: { id_token: { email: null } },