diff --git a/npm-shrinkwrap.json b/npm-shrinkwrap.json
index ca8c5e1..cc12b38 100644
--- a/npm-shrinkwrap.json
+++ b/npm-shrinkwrap.json
@@ -9,7 +9,8 @@
             "version": "0.1.0-develop.23",
             "dependencies": {
                 "@lumeweb/libweb": "0.2.0-develop.27",
-                "emittery": "^1.0.1"
+                "emittery": "^1.0.1",
+                "p-defer": "^4.0.0"
             },
             "devDependencies": {
                 "@lumeweb/node-library-preset": "^0.2.7",
diff --git a/package.json b/package.json
index 89c0ded..861cac3 100644
--- a/package.json
+++ b/package.json
@@ -35,7 +35,8 @@
     },
     "dependencies": {
         "@lumeweb/libweb": "0.2.0-develop.27",
-        "emittery": "^1.0.1"
+        "emittery": "^1.0.1",
+        "p-defer": "^4.0.0"
     },
     "publishConfig": {
         "access": "public"