diff --git a/package.json b/package.json
index 279f9cb..668d091 100644
--- a/package.json
+++ b/package.json
@@ -30,7 +30,7 @@
     "eslint-config-es2015": "1.1.0",
     "eslint-config-prettier": "6.0.0",
     "esm": "3.2.25",
-    "microbundle": "0.11.0",
+    "microbundle": "0.12.0",
     "prettier": "1.18.2",
     "rimraf": "2.6.3",
     "rxjs": "6.5.2"