# Configuring Talend Data Preparation when Talend Administration Center is in HTTPS

For Talend Data Preparation to be able to connect to a Talend Administration Center instance running in https, Talend Data Preparation must trust the Talend Administration Center certificate.

## Procedure

1. Retrieve Talend Administration Center certificate, or its Certificate Authority and add it to an existing or new .jks file following this example:

   keytool -import -trustcacerts -alias &lt;cert-alias&gt; -file &lt;tac\_certificate.crt&gt; -keystore &lt;truststore.jks&gt;
2. In the &lt;Data\_Preparation\_Path&gt;/config/application.properties file, add the following properties to set the truststore:
   ```
   tls.trust-store=/path/to/<truststore.jks>
   tls.trust-store-password=<trust-store_password>

   false to disable hostname verification
   tls.verify-hostname=true
   ```
3. Restart Talend Data Preparation.