diff --git a/package.json b/package.json
index 1d39603..4630f1a 100644
--- a/package.json
+++ b/package.json
@@ -61,7 +61,7 @@
     "@types/dirty-chai": "^2.0.2",
     "@types/mocha": "^5.2.7",
     "@types/sinon": "^7.5.1",
-    "aegir": "^20.4.1",
+    "aegir": "^21.0.2",
     "benchmark": "^2.1.4",
     "chai": "^4.2.0",
     "chai-string": "^1.5.0",