diff --git a/lib/utils.js b/lib/utils.js
index 8837f72..f41667d 100644
--- a/lib/utils.js
+++ b/lib/utils.js
@@ -1,8 +1,10 @@
 'use strict';
 const isStream = require('is-stream');
 
-// TODO https://github.com/sindresorhus/is-observable/issues/1
-const isObservable = obj => Boolean(obj && typeof obj.subscribe === 'function' && obj.constructor.name === 'Observable');
+// RxJS@6 symbol (https://github.com/sindresorhus/is-observable/issues/1#issuecomment-387843191)
+const symbolObservable = typeof Symbol === 'function' && Symbol.observable || '@@observable';		// eslint-disable-line no-mixed-operators
+
+const isObservable = obj => Boolean(obj && obj[symbolObservable] && obj === obj[symbolObservable]()) || require('is-observable')(obj);
 
 exports.isListr = obj => Boolean(obj && obj.setRenderer && obj.add && obj.run);
 exports.isObservable = obj => isObservable(obj);
diff --git a/package.json b/package.json
index 9c43031..bb53faf 100644
--- a/package.json
+++ b/package.json
@@ -42,6 +42,7 @@
     "cli-truncate": "^0.2.1",
     "figures": "^1.7.0",
     "indent-string": "^2.1.0",
+    "is-observable": "^1.1.0",
     "is-promise": "^2.1.0",
     "is-stream": "^1.1.0",
     "listr-silent-renderer": "^1.1.1",