Encrypt Doesn't Work with URLs

[robtg4]

It seems that the sls encrypt command doesn't store urls with certain characters in them. I tried making this a string by placing quotations around the value, but upon decrypting each time, the result is just an empty string. Is there a particular way to do this correctly? This would be to encrypt the postgresql database connection url for AWS

[mpuittinen]

Would you have some example that fails to encrypt?