diff --git a/lib/scheduling.ts b/lib/scheduling.ts
index d63e800..4715855 100644
--- a/lib/scheduling.ts
+++ b/lib/scheduling.ts
@@ -18,7 +18,7 @@
  */
 
 import * as crypto from "crypto";
-import * as later from "later";
+import * as later from "@breejs/later";
 
 function md532(str): number {
   const digest = crypto.createHash("md5").update(str).digest();
diff --git a/npm-shrinkwrap.json b/npm-shrinkwrap.json
index 911cc3c..964a67f 100644
--- a/npm-shrinkwrap.json
+++ b/npm-shrinkwrap.json
@@ -82,6 +82,11 @@
         }
       }
     },
+    "@breejs/later": {
+      "version": "4.1.0",
+      "resolved": "https://registry.npmjs.org/@breejs/later/-/later-4.1.0.tgz",
+      "integrity": "sha512-QgGnZ9b7o4k0Ai1ZbTJWwZpZcFK9d+Gb+DyNt4UT9x6IEIs5HVu0iIlmgzGqN+t9MoJSpSPo9S/Mm51UtHr3JA=="
+    },
     "@concordance/react": {
       "version": "2.0.0",
       "resolved": "https://registry.npmjs.org/@concordance/react/-/react-2.0.0.tgz",
@@ -3477,11 +3482,6 @@
       "resolved": "https://registry.npmjs.org/koa-unless/-/koa-unless-1.0.7.tgz",
       "integrity": "sha1-ud83XitNowQ5GNSGIlIMLAt58DI="
     },
-    "later": {
-      "version": "1.2.0",
-      "resolved": "https://registry.npmjs.org/later/-/later-1.2.0.tgz",
-      "integrity": "sha1-8s9sTdeVbdL1IK3wMpg26YdrrQ8="
-    },
     "latest-version": {
       "version": "5.1.0",
       "resolved": "https://registry.npmjs.org/latest-version/-/latest-version-5.1.0.tgz",
diff --git a/package.json b/package.json
index 7fb2b13..ece3b66 100644
--- a/package.json
+++ b/package.json
@@ -19,6 +19,7 @@
     "bin": "bin"
   },
   "dependencies": {
+    "@breejs/later": "^4.1.0",
     "espresso-iisojs": "^1.0.4",
     "iconv-lite": "^0.6.3",
     "ipaddr.js": "^2.0.1",
@@ -29,7 +30,6 @@
     "koa-jwt": "^4.0.1",
     "koa-router": "^10.1.1",
     "koa-static": "^5.0.0",
-    "later": "^1.2.0",
     "mongodb": "^4.1.2",
     "parsimmon": "^1.18.0",
     "seedrandom": "^3.0.5"