All pages and content for [Cognito Forms](https://www.cognitoforms.com) are always served over HTTPS.  For example, clicking this link: 

http://www.cognitoforms.com

will automatically redirect you to:

https://www.cognitoforms.com

**However**, if you add images to your forms by specifying a URL to your images from your website, instead of uploading your images, these links must also be HTTPS.  If they are not, you will receive a security warning.

If this is not the problem in your case, please submit a support request so we can take a look at your specific form, and please provide a link to where your form is embedded in your secure website.

https://www.cognitoforms.com/support