After digging through the help section on namecheap I made some entries into my crontab to update dns entries automatically:
*/5 * * * * sleep 25 ; wget -O - "https://dynamicdns.park-your-domain.com/update?host=www&domain=heroicdebugging.biz&password=YOURPASSWORD" */5 * * * * sleep 25 ; wget -O - "https://dynamicdns.park-your-domain.com/update?host=*&domain=heroicdebugging.biz&password=YOURPASSWORD"
- host: which entry you want to update, supports wildcards
- domain: the domain you want to modify
- password: the password you receive after you activate dynamic dns for your domain