diff --git a/packages/web/CHANGELOG.md b/packages/web/CHANGELOG.md
index 4f515f1..741ec61 100644
--- a/packages/web/CHANGELOG.md
+++ b/packages/web/CHANGELOG.md
@@ -1,3 +1,7 @@
+## 0.3.2
+
+- better version of the session id generator
+
 ## 0.3.1
 
 - use new session id format
diff --git a/packages/web/package.json b/packages/web/package.json
index 0704f1e..451c112 100644
--- a/packages/web/package.json
+++ b/packages/web/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@aptabase/web",
-  "version": "0.3.1",
+  "version": "0.3.2",
   "type": "module",
   "description": "JavaScript SDK for Aptabase: Open Source, Privacy-First and Simple Analytics for Mobile, Desktop and Web Apps",
   "main": "./dist/index.cjs",
diff --git a/packages/web/src/session.ts b/packages/web/src/session.ts
index c12268f..c14fc7b 100644
--- a/packages/web/src/session.ts
+++ b/packages/web/src/session.ts
@@ -1,5 +1,8 @@
 export function newSessionId(): string {
-  const epochInSeconds = BigInt(Math.floor(Date.now() / 1000));
-  const random = BigInt(Math.floor(Math.random() * 100000000));
-  return (epochInSeconds * 100000000n + random).toString();
+  const epochInSeconds = Math.floor(Date.now() / 1000).toString();
+  const random = Math.floor(Math.random() * 100000000)
+    .toString()
+    .padStart(8, '0');
+
+  return epochInSeconds + random;
 }