diff --git a/tools/tupctime/index.js b/tools/tupctime/index.js
index 6d33602c..6053acd9 100644
--- a/tools/tupctime/index.js
+++ b/tools/tupctime/index.js
@@ -1,8 +1,10 @@
 
-const fs = require('fs');
-const pathlib = require('path');
-const Database = require('better-sqlite3');
-const debug = require('debug')('tupctime');
+import fs from 'fs';
+import pathlib from 'path';
+import Database from 'better-sqlite3';
+import debugfn from 'debug';
+
+const debug = debugfn('tupctime');
 
 const start = process.argv[2];
 if (start !== undefined) {
diff --git a/tools/tupctime/package.json b/tools/tupctime/package.json
index 2cf0c9d8..7c16e87e 100644
--- a/tools/tupctime/package.json
+++ b/tools/tupctime/package.json
@@ -1 +1,7 @@
-{"dependencies":{"better-sqlite3":"^7.0.1","debug":"^4.1.1"}}
+{
+    "dependencies": {
+        "better-sqlite3":"^7.0.1",
+        "debug":"^4.1.1"
+    },
+    "type": "module"
+}