diff --git a/src/node/db/DB.js b/src/node/db/DB.ts
similarity index 92%
rename from src/node/db/DB.js
rename to src/node/db/DB.ts
index 02e83f85d..bd8b8e9a2 100644
--- a/src/node/db/DB.js
+++ b/src/node/db/DB.ts
@@ -47,13 +47,13 @@ exports.init = async () => {
   }
   for (const fn of ['get', 'set', 'findKeys', 'getSub', 'setSub', 'remove']) {
     const f = exports.db[fn];
-    exports[fn] = async (...args) => await f.call(exports.db, ...args);
+    exports[fn] = async (...args:string[]) => await f.call(exports.db, ...args);
     Object.setPrototypeOf(exports[fn], Object.getPrototypeOf(f));
     Object.defineProperties(exports[fn], Object.getOwnPropertyDescriptors(f));
   }
 };
 
-exports.shutdown = async (hookName, context) => {
+exports.shutdown = async (hookName: string, context:any) => {
   if (exports.db != null) await exports.db.close();
   exports.db = null;
   logger.log('Database closed');
diff --git a/src/node/db/SessionStore.js b/src/node/db/SessionStore.ts
similarity index 94%
rename from src/node/db/SessionStore.js
rename to src/node/db/SessionStore.ts
index 40e5e90d0..5dca5e201 100644
--- a/src/node/db/SessionStore.js
+++ b/src/node/db/SessionStore.ts
@@ -34,9 +34,10 @@ class SessionStore extends Store {
     for (const {timeout} of this._expirations.values()) clearTimeout(timeout);
   }
 
-  async _updateExpirations(sid, sess, updateDbExp = true) {
+  async _updateExpirations(sid: string, sess: any, updateDbExp = true) {
     const exp = this._expirations.get(sid) || {};
     clearTimeout(exp.timeout);
+    // @ts-ignore
     const {cookie: {expires} = {}} = sess || {};
     if (expires) {
       const sessExp = new Date(expires).getTime();
@@ -63,23 +64,23 @@ class SessionStore extends Store {
     return sess;
   }
 
-  async _write(sid, sess) {
+  async _write(sid: string, sess: any) {
     await DB.set(`sessionstorage:${sid}`, sess);
   }
 
-  async _get(sid) {
+  async _get(sid: string) {
     logger.debug(`GET ${sid}`);
     const s = await DB.get(`sessionstorage:${sid}`);
     return await this._updateExpirations(sid, s);
   }
 
-  async _set(sid, sess) {
+  async _set(sid: string, sess:any) {
     logger.debug(`SET ${sid}`);
     sess = await this._updateExpirations(sid, sess);
     if (sess != null) await this._write(sid, sess);
   }
 
-  async _destroy(sid) {
+  async _destroy(sid:string) {
     logger.debug(`DESTROY ${sid}`);
     clearTimeout((this._expirations.get(sid) || {}).timeout);
     this._expirations.delete(sid);
@@ -89,7 +90,7 @@ class SessionStore extends Store {
   // Note: express-session might call touch() before it calls set() for the first time. Ideally this
   // would behave like set() in that case but it's OK if it doesn't -- express-session will call
   // set() soon enough.
-  async _touch(sid, sess) {
+  async _touch(sid: string, sess:any) {
     logger.debug(`TOUCH ${sid}`);
     sess = await this._updateExpirations(sid, sess, false);
     if (sess == null) return; // Already expired.
diff --git a/src/node/models/AsyncQueueTask.ts b/src/node/models/AsyncQueueTask.ts
new file mode 100644
index 000000000..03a915ac7
--- /dev/null
+++ b/src/node/models/AsyncQueueTask.ts
@@ -0,0 +1,5 @@
+export type AsyncQueueTask = {
+    srcFile: string,
+    destFile: string,
+    type: string
+}
\ No newline at end of file
diff --git a/src/node/models/PromiseWithStd.ts b/src/node/models/PromiseWithStd.ts
new file mode 100644
index 000000000..46b03076a
--- /dev/null
+++ b/src/node/models/PromiseWithStd.ts
@@ -0,0 +1,8 @@
+import {Readable} from "node:stream";
+import {ChildProcess} from "node:child_process";
+
+export type PromiseWithStd = {
+    stdout?: Readable|null,
+    stderr?: Readable|null,
+    child?: ChildProcess
+} & Promise<any>
\ No newline at end of file
diff --git a/src/node/models/RunCMDOptions.ts b/src/node/models/RunCMDOptions.ts
new file mode 100644
index 000000000..74298f221
--- /dev/null
+++ b/src/node/models/RunCMDOptions.ts
@@ -0,0 +1,15 @@
+export type RunCMDOptions = {
+    cwd?: string,
+    stdio?: string[],
+    env?: NodeJS.ProcessEnv
+}
+
+export type RunCMDPromise = {
+    stdout?:Function,
+    stderr?:Function
+}
+
+export type ErrorExtended = {
+    code?: number|null,
+    signal?: NodeJS.Signals|null
+}
\ No newline at end of file
diff --git a/src/node/padaccess.js b/src/node/padaccess.ts
similarity index 70%
rename from src/node/padaccess.js
rename to src/node/padaccess.ts
index e9cc7cde5..ce3cf9ddd 100644
--- a/src/node/padaccess.js
+++ b/src/node/padaccess.ts
@@ -2,7 +2,7 @@
 const securityManager = require('./db/SecurityManager');
 
 // checks for padAccess
-module.exports = async (req, res) => {
+module.exports = async (req: { params?: any; cookies?: any; session?: any; }, res: { status: (arg0: number) => { (): any; new(): any; send: { (arg0: string): void; new(): any; }; }; }) => {
   const {session: {user} = {}} = req;
   const accessObj = await securityManager.checkAccess(
       req.params.pad, req.cookies.sessionID, req.cookies.token, user);
diff --git a/src/node/stats.js b/src/node/stats.ts
similarity index 65%
rename from src/node/stats.js
rename to src/node/stats.ts
index cecaca20d..2767b542f 100644
--- a/src/node/stats.js
+++ b/src/node/stats.ts
@@ -4,6 +4,6 @@ const measured = require('measured-core');
 
 module.exports = measured.createCollection();
 
-module.exports.shutdown = async (hookName, context) => {
+module.exports.shutdown = async (hookName: string, context:any) => {
   module.exports.end();
 };
diff --git a/src/node/utils/Abiword.js b/src/node/utils/Abiword.ts
similarity index 72%
rename from src/node/utils/Abiword.js
rename to src/node/utils/Abiword.ts
index 1ed487ae1..74034b23b 100644
--- a/src/node/utils/Abiword.js
+++ b/src/node/utils/Abiword.ts
@@ -19,6 +19,9 @@
  * limitations under the License.
  */
 
+import {ChildProcess} from "node:child_process";
+import {AsyncQueueTask} from "../models/AsyncQueueTask";
+
 const spawn = require('child_process').spawn;
 const async = require('async');
 const settings = require('./Settings');
@@ -27,13 +30,13 @@ const os = require('os');
 // on windows we have to spawn a process for each convertion,
 // cause the plugin abicommand doesn't exist on this platform
 if (os.type().indexOf('Windows') > -1) {
-  exports.convertFile = async (srcFile, destFile, type) => {
+  exports.convertFile = async (srcFile: string, destFile: string, type: string) => {
     const abiword = spawn(settings.abiword, [`--to=${destFile}`, srcFile]);
     let stdoutBuffer = '';
-    abiword.stdout.on('data', (data) => { stdoutBuffer += data.toString(); });
-    abiword.stderr.on('data', (data) => { stdoutBuffer += data.toString(); });
-    await new Promise((resolve, reject) => {
-      abiword.on('exit', (code) => {
+    abiword.stdout.on('data', (data: string) => { stdoutBuffer += data.toString(); });
+    abiword.stderr.on('data', (data: string) => { stdoutBuffer += data.toString(); });
+    await new Promise<void>((resolve, reject) => {
+      abiword.on('exit', (code: number) => {
         if (code !== 0) return reject(new Error(`Abiword died with exit code ${code}`));
         if (stdoutBuffer !== '') {
           console.log(stdoutBuffer);
@@ -46,13 +49,13 @@ if (os.type().indexOf('Windows') > -1) {
   // communicate with it via stdin/stdout
   // thats much faster, about factor 10
 } else {
-  let abiword;
-  let stdoutCallback = null;
+  let abiword: ChildProcess;
+  let stdoutCallback: Function|null = null;
   const spawnAbiword = () => {
     abiword = spawn(settings.abiword, ['--plugin', 'AbiCommand']);
     let stdoutBuffer = '';
     let firstPrompt = true;
-    abiword.stderr.on('data', (data) => { stdoutBuffer += data.toString(); });
+    abiword.stderr!.on('data', (data) => { stdoutBuffer += data.toString(); });
     abiword.on('exit', (code) => {
       spawnAbiword();
       if (stdoutCallback != null) {
@@ -60,7 +63,7 @@ if (os.type().indexOf('Windows') > -1) {
         stdoutCallback = null;
       }
     });
-    abiword.stdout.on('data', (data) => {
+    abiword.stdout!.on('data', (data) => {
       stdoutBuffer += data.toString();
       // we're searching for the prompt, cause this means everything we need is in the buffer
       if (stdoutBuffer.search('AbiWord:>') !== -1) {
@@ -76,15 +79,15 @@ if (os.type().indexOf('Windows') > -1) {
   };
   spawnAbiword();
 
-  const queue = async.queue((task, callback) => {
-    abiword.stdin.write(`convert ${task.srcFile} ${task.destFile} ${task.type}\n`);
-    stdoutCallback = (err) => {
+  const queue = async.queue((task: AsyncQueueTask, callback:Function) => {
+    abiword.stdin!.write(`convert ${task.srcFile} ${task.destFile} ${task.type}\n`);
+    stdoutCallback = (err: string) => {
       if (err != null) console.error('Abiword File failed to convert', err);
       callback(err);
     };
   }, 1);
 
-  exports.convertFile = async (srcFile, destFile, type) => {
+  exports.convertFile = async (srcFile: string, destFile: string, type: string) => {
     await queue.pushAsync({srcFile, destFile, type});
   };
 }
diff --git a/src/node/utils/AbsolutePaths.js b/src/node/utils/AbsolutePaths.ts
similarity index 94%
rename from src/node/utils/AbsolutePaths.js
rename to src/node/utils/AbsolutePaths.ts
index 73a96bb67..c257440a1 100644
--- a/src/node/utils/AbsolutePaths.js
+++ b/src/node/utils/AbsolutePaths.ts
@@ -18,7 +18,6 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-
 const log4js = require('log4js');
 const path = require('path');
 const _ = require('underscore');
@@ -29,7 +28,7 @@ const absPathLogger = log4js.getLogger('AbsolutePaths');
  * findEtherpadRoot() computes its value only on first invocation.
  * Subsequent invocations are served from this variable.
  */
-let etherpadRoot = null;
+let etherpadRoot: string|null = null;
 
 /**
  * If stringArray's last elements are exactly equal to lastDesiredElements,
@@ -41,7 +40,7 @@ let etherpadRoot = null;
  * @return {string[]|boolean} The shortened array, or false if there was no
  *                            overlap.
  */
-const popIfEndsWith = (stringArray, lastDesiredElements) => {
+const popIfEndsWith = (stringArray: string[], lastDesiredElements: string[]): string[] | false => {
   if (stringArray.length <= lastDesiredElements.length) {
     absPathLogger.debug(`In order to pop "${lastDesiredElements.join(path.sep)}" ` +
                         `from "${stringArray.join(path.sep)}", it should contain at least ` +
@@ -131,7 +130,7 @@ exports.findEtherpadRoot = () => {
  *                  it is returned unchanged. Otherwise it is interpreted
  *                  relative to exports.root.
  */
-exports.makeAbsolute = (somePath) => {
+exports.makeAbsolute = (somePath: string) => {
   if (path.isAbsolute(somePath)) {
     return somePath;
   }
@@ -150,10 +149,8 @@ exports.makeAbsolute = (somePath) => {
  *                                 a subdirectory of the base one
  * @return {boolean}
  */
-exports.isSubdir = (parent, arbitraryDir) => {
+exports.isSubdir = (parent: string, arbitraryDir: string): boolean => {
   // modified from: https://stackoverflow.com/questions/37521893/determine-if-a-path-is-subdirectory-of-another-in-node-js#45242825
   const relative = path.relative(parent, arbitraryDir);
-  const isSubdir = !!relative && !relative.startsWith('..') && !path.isAbsolute(relative);
-
-  return isSubdir;
+  return !!relative && !relative.startsWith('..') && !path.isAbsolute(relative);
 };
diff --git a/src/node/utils/randomstring.js b/src/node/utils/randomstring.ts
similarity index 59%
rename from src/node/utils/randomstring.js
rename to src/node/utils/randomstring.ts
index 4ffd3e8ae..f60fae1f3 100644
--- a/src/node/utils/randomstring.js
+++ b/src/node/utils/randomstring.ts
@@ -3,8 +3,8 @@
  * Generates a random String with the given length. Is needed to generate the
  * Author, Group, readonly, session Ids
  */
-const crypto = require('crypto');
+const cryptoMod = require('crypto');
 
-const randomString = (len) => crypto.randomBytes(len).toString('hex');
+const randomString = (len: string) => cryptoMod.randomBytes(len).toString('hex');
 
 module.exports = randomString;
diff --git a/src/node/utils/run_cmd.js b/src/node/utils/run_cmd.ts
similarity index 83%
rename from src/node/utils/run_cmd.js
rename to src/node/utils/run_cmd.ts
index bf5515c84..083d43c5c 100644
--- a/src/node/utils/run_cmd.js
+++ b/src/node/utils/run_cmd.ts
@@ -1,5 +1,10 @@
 'use strict';
 
+import {ErrorExtended, RunCMDOptions, RunCMDPromise} from "../models/RunCMDOptions";
+import {ChildProcess} from "node:child_process";
+import {PromiseWithStd} from "../models/PromiseWithStd";
+import {Readable} from "node:stream";
+
 const spawn = require('cross-spawn');
 const log4js = require('log4js');
 const path = require('path');
@@ -7,12 +12,12 @@ const settings = require('./Settings');
 
 const logger = log4js.getLogger('runCmd');
 
-const logLines = (readable, logLineFn) => {
-  readable.setEncoding('utf8');
+const logLines = (readable: undefined | Readable | null, logLineFn: (arg0: (string | undefined)) => void) => {
+  readable!.setEncoding('utf8');
   // The process won't necessarily write full lines every time -- it might write a part of a line
   // then write the rest of the line later.
-  let leftovers = '';
-  readable.on('data', (chunk) => {
+  let leftovers: string| undefined = '';
+  readable!.on('data', (chunk) => {
     const lines = chunk.split('\n');
     if (lines.length === 0) return;
     lines[0] = leftovers + lines[0];
@@ -21,7 +26,7 @@ const logLines = (readable, logLineFn) => {
       logLineFn(line);
     }
   });
-  readable.on('end', () => {
+  readable!.on('end', () => {
     if (leftovers !== '') logLineFn(leftovers);
     leftovers = '';
   });
@@ -69,7 +74,7 @@ const logLines = (readable, logLineFn) => {
  *   - `stderr`: Similar to `stdout` but for stderr.
  *   - `child`: The ChildProcess object.
  */
-module.exports = exports = (args, opts = {}) => {
+module.exports = exports = (args: string[], opts:RunCMDOptions = {}) => {
   logger.debug(`Executing command: ${args.join(' ')}`);
 
   opts = {cwd: settings.root, ...opts};
@@ -82,8 +87,8 @@ module.exports = exports = (args, opts = {}) => {
       : opts.stdio === 'string' ? [null, 'string', 'string']
       : Array(3).fill(opts.stdio);
   const cmdLogger = log4js.getLogger(`runCmd|${args[0]}`);
-  if (stdio[1] == null) stdio[1] = (line) => cmdLogger.info(line);
-  if (stdio[2] == null) stdio[2] = (line) => cmdLogger.error(line);
+  if (stdio[1] == null) stdio[1] = (line: string) => cmdLogger.info(line);
+  if (stdio[2] == null) stdio[2] = (line: string) => cmdLogger.error(line);
   const stdioLoggers = [];
   const stdioSaveString = [];
   for (const fd of [1, 2]) {
@@ -116,13 +121,13 @@ module.exports = exports = (args, opts = {}) => {
 
   // Create an error object to use in case the process fails. This is done here rather than in the
   // process's `exit` handler so that we get a useful stack trace.
-  const procFailedErr = new Error();
+  const procFailedErr: Error & ErrorExtended = new Error();
 
-  const proc = spawn(args[0], args.slice(1), opts);
-  const streams = [undefined, proc.stdout, proc.stderr];
+  const proc: ChildProcess = spawn(args[0], args.slice(1), opts);
+  const streams:[undefined, Readable|null, Readable|null] = [undefined, proc.stdout, proc.stderr];
 
-  let px;
-  const p = new Promise((resolve, reject) => { px = {resolve, reject}; });
+  let px: { reject: any; resolve: any; };
+  const p:PromiseWithStd = new Promise<string>((resolve, reject) => { px = {resolve, reject}; });
   [, p.stdout, p.stderr] = streams;
   p.child = proc;
 
@@ -132,9 +137,10 @@ module.exports = exports = (args, opts = {}) => {
     if (stdioLoggers[fd] != null) {
       logLines(streams[fd], stdioLoggers[fd]);
     } else if (stdioSaveString[fd]) {
+      // @ts-ignore
       p[[null, 'stdout', 'stderr'][fd]] = stdioStringPromises[fd] = (async () => {
         const chunks = [];
-        for await (const chunk of streams[fd]) chunks.push(chunk);
+        for await (const chunk of streams[fd]!) chunks.push(chunk);
         return Buffer.concat(chunks).toString().replace(/\n+$/g, '');
       })();
     }
diff --git a/src/package-lock.json b/src/package-lock.json
index eacad0e18..9f2964398 100644
--- a/src/package-lock.json
+++ b/src/package-lock.json
@@ -409,6 +409,12 @@
       "integrity": "sha512-sXXKG+uL9IrKqViTtao2Ws6dy0znu9sOaP1di/jKGW1M6VssO8vlpXCQcpZ+jisQ1tTFAC5Jo/EOzFbggBagFQ==",
       "dev": true
     },
+    "@types/async": {
+      "version": "3.2.24",
+      "resolved": "https://registry.npmjs.org/@types/async/-/async-3.2.24.tgz",
+      "integrity": "sha512-8iHVLHsCCOBKjCF2KwFe0p9Z3rfM9mL+sSP8btyR5vTjJRAqpBYD28/ZLgXPf0pjG1VxOvtCV/BgXkQbpSe8Hw==",
+      "dev": true
+    },
     "@types/debug": {
       "version": "4.1.12",
       "resolved": "https://registry.npmjs.org/@types/debug/-/debug-4.1.12.tgz",
diff --git a/src/package.json b/src/package.json
index 5d403daab..ad5537947 100644
--- a/src/package.json
+++ b/src/package.json
@@ -68,17 +68,18 @@
     "terser": "^5.27.0",
     "threads": "^1.7.0",
     "tinycon": "0.6.8",
+    "tsx": "^4.7.0",
     "ueberdb2": "^4.2.48",
     "underscore": "1.13.6",
     "unorm": "1.6.0",
-    "wtfnode": "^0.9.1",
-    "tsx": "^4.7.0"
+    "wtfnode": "^0.9.1"
   },
   "bin": {
     "etherpad-healthcheck": "bin/etherpad-healthcheck",
     "etherpad-lite": "node/server.ts"
   },
   "devDependencies": {
+    "@types/async": "^3.2.24",
     "typescript": "^5.3.3",
     "@types/node": "^20.11.5",
     "eslint": "^8.56.0",
diff --git a/src/tsconfig.json b/src/tsconfig.json
index e075f973c..5706def60 100644
--- a/src/tsconfig.json
+++ b/src/tsconfig.json
@@ -1,7 +1,8 @@
 {
   "compilerOptions": {
     /* Visit https://aka.ms/tsconfig to read more about this file */
-
+    "moduleDetection": "force",
+    "lib": ["es6"],
     /* Projects */
     // "incremental": true,                              /* Save .tsbuildinfo files to allow for incremental compilation of projects. */
     // "composite": true,                                /* Enable constraints that allow a TypeScript project to be used with project references. */
@@ -11,7 +12,7 @@
     // "disableReferencedProjectLoad": true,             /* Reduce the number of projects loaded automatically by TypeScript. */
 
     /* Language and Environment */
-    "target": "es2016",                                  /* Set the JavaScript language version for emitted JavaScript and include compatible library declarations. */
+    "target": "es6",                                  /* Set the JavaScript language version for emitted JavaScript and include compatible library declarations. */
     // "lib": [],                                        /* Specify a set of bundled library declaration files that describe the target runtime environment. */
     // "jsx": "preserve",                                /* Specify what JSX code is generated. */
     // "experimentalDecorators": true,                   /* Enable experimental support for legacy experimental decorators. */