bignum too big to convert into `long' rails admin

I am trying to search records in rails admin panel by entering a value of 569785067261691692240000 in the filter text field. I get a error "bignum too big to convert into `long'".

Search works fine if the text in the filter text field is alphanumeric but doesn't work if the text is numeric.

Can't understand what the problem is.

I am using 0.6.3 version of rails admin gem.