diff --git a/npm-shrinkwrap.json b/npm-shrinkwrap.json
index 3062be6..814ee58 100644
--- a/npm-shrinkwrap.json
+++ b/npm-shrinkwrap.json
@@ -14,6 +14,7 @@
                 "isomorphic-ws": "^5.0.0",
                 "mime": "^4.0.1",
                 "multiformats": "^13.0.0",
+                "p-defer": "^4.0.0",
                 "tus-js-client": "^4.0.0",
                 "url-join": "^5.0.0"
             },
diff --git a/package.json b/package.json
index 237a7ec..3b4d0f7 100644
--- a/package.json
+++ b/package.json
@@ -27,6 +27,7 @@
         "isomorphic-ws": "^5.0.0",
         "mime": "^4.0.1",
         "multiformats": "^13.0.0",
+        "p-defer": "^4.0.0",
         "tus-js-client": "^4.0.0",
         "url-join": "^5.0.0"
     },