diff --git a/package-lock.json b/package-lock.json
index 210f9a5..c72166e 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -385,14 +385,6 @@
       "integrity": "sha1-n7OjzzEyMoFR81PeRjLgHlIQK+o=",
       "dev": true
     },
-    "@szmarczak/http-timer": {
-      "version": "4.0.5",
-      "resolved": "https://r.cnpmjs.org/@szmarczak/http-timer/download/@szmarczak/http-timer-4.0.5.tgz",
-      "integrity": "sha1-v71QIR6d+lG6B9pYoUzf0zMgUVI=",
-      "requires": {
-        "defer-to-connect": "^2.0.0"
-      }
-    },
     "@types/bcrypt": {
       "version": "3.0.0",
       "resolved": "https://r.cnpmjs.org/@types/bcrypt/download/@types/bcrypt-3.0.0.tgz",
@@ -1297,11 +1289,6 @@
         "strip-bom": "^4.0.0"
       }
     },
-    "defer-to-connect": {
-      "version": "2.0.0",
-      "resolved": "https://r.cnpmjs.org/defer-to-connect/download/defer-to-connect-2.0.0.tgz",
-      "integrity": "sha1-g9axmdsEFZOshNeBtSIjCMz0wsE="
-    },
     "define-properties": {
       "version": "1.1.3",
       "resolved": "https://r.cnpmjs.org/define-properties/download/define-properties-1.1.3.tgz",
@@ -2603,6 +2590,15 @@
       "resolved": "https://r.cnpmjs.org/nocache/download/nocache-2.1.0.tgz",
       "integrity": "sha1-Egyf/sQ7Vymx1d6IzXGqdaC6SR8="
     },
+    "node-cron": {
+      "version": "2.0.3",
+      "resolved": "https://registry.npmjs.org/node-cron/-/node-cron-2.0.3.tgz",
+      "integrity": "sha512-eJI+QitXlwcgiZwNNSRbqsjeZMp5shyajMR81RZCqeW0ZDEj4zU9tpd4nTh/1JsBiKbF8d08FCewiipDmVIYjg==",
+      "requires": {
+        "opencollective-postinstall": "^2.0.0",
+        "tz-offset": "0.0.1"
+      }
+    },
     "node-environment-flags": {
       "version": "1.0.6",
       "resolved": "https://r.cnpmjs.org/node-environment-flags/download/node-environment-flags-1.0.6.tgz",
@@ -2958,6 +2954,11 @@
       "resolved": "https://r.cnpmjs.org/openapi-types/download/openapi-types-1.3.5.tgz",
       "integrity": "sha1-ZxjPvIV/5sbxRx9lsyveu5wQzkA="
     },
+    "opencollective-postinstall": {
+      "version": "2.0.3",
+      "resolved": "https://registry.npmjs.org/opencollective-postinstall/-/opencollective-postinstall-2.0.3.tgz",
+      "integrity": "sha512-8AV/sCtuzUeTo8gQK5qDZzARrulB3egtLzFgteqB2tcT4Mw7B8Kt7JcDHmltjz6FOAHsvTevk70gZEbhM4ZS9Q=="
+    },
     "os-tmpdir": {
       "version": "1.0.2",
       "resolved": "https://r.cnpmjs.org/os-tmpdir/download/os-tmpdir-1.0.2.tgz",
@@ -3936,6 +3937,11 @@
       "integrity": "sha1-mNYApevcOPQMsndSLxLcgA6eJfo=",
       "dev": true
     },
+    "tz-offset": {
+      "version": "0.0.1",
+      "resolved": "https://registry.npmjs.org/tz-offset/-/tz-offset-0.0.1.tgz",
+      "integrity": "sha512-kMBmblijHJXyOpKzgDhKx9INYU4u4E1RPMB0HqmKSgWG8vEcf3exEfLh4FFfzd3xdQOw9EuIy/cP0akY6rHopQ=="
+    },
     "undefsafe": {
       "version": "2.0.3",
       "resolved": "https://r.cnpmjs.org/undefsafe/download/undefsafe-2.0.3.tgz",
diff --git a/package.json b/package.json
index 2097e66..baed92e 100644
--- a/package.json
+++ b/package.json
@@ -38,6 +38,7 @@
     "json2csv": "^5.0.1",
     "lodash": "^4.17.15",
     "mongoose": "^5.8.7",
+    "node-cron": "^2.0.3",
     "swagger-ui-dist": "^3.30.2"
   },
   "devDependencies": {
diff --git a/src/db.ts b/src/db.ts
index 5f4face..2e8592d 100644
--- a/src/db.ts
+++ b/src/db.ts
@@ -2,12 +2,14 @@ import mongoose from 'mongoose';
 import cfenv from 'cfenv';
 import _ from 'lodash';
 import ChangelogModel from './models/changelog';
+import cron from 'node-cron';
 
 
 // database urls, prod db url is retrieved automatically
 const TESTING_URL = 'mongodb://localhost/dfopdb_test';
 const DEV_URL = 'mongodb://localhost/dfopdb';
 const debugging = true;
+const changelogKeepDays = 30;  // days to keep the changelog
 
 if (process.env.NODE_ENV !== 'production' && debugging) {
   mongoose.set('debug', true);  // enable mongoose debug
@@ -78,6 +80,16 @@ export default class db {
       this.state.db = mongoose.connection;
       done();
     });
+
+    if (mode !== 'test') {  // clear old changelog regularly
+      cron.schedule('0 0 * * *', () => {
+        ChangelogModel.deleteMany({_id: {$lt:  // id from time
+          Math.floor(new Date().getTime() / 1000 - changelogKeepDays * 24 * 60 * 60).toString(16) + '0000000000000000'
+        }}).log({method: 'scheduled changelog delete', url: '', authDetails: {}}).lean().exec(err => {
+          if (err) console.error(err);
+        });
+      });
+    }
   }
 
   static disconnect (done) {