diff --git a/package.json b/package.json
index c5fdab6..7a0bb39 100644
--- a/package.json
+++ b/package.json
@@ -25,7 +25,7 @@
     "ember-cli-htmlbars": "^5.2.0"
   },
   "peerDependencies": {
-    "ember-concurrency": "^1.0.0"
+    "ember-concurrency": "^1.0.0 || ^2.0.0"
   },
   "devDependencies": {
     "@ember/optional-features": "^2.0.0",