diff --git a/README.md b/README.md
index d08293e..1125878 100644
--- a/README.md
+++ b/README.md
@@ -8,6 +8,8 @@ A simple utility to build and unpack 'ftab' (aka 'rkosftab') images found in fir
 
 'ftab' (which probably means **F**ile **TAB**le) files are simple tables of files where a key is a 4-byte tag (e.g. 'rkos' which stands for **R**T**K**it **OS**) and a value are the contents of the corresponding file. An optional [APTicket](https://www.theiphonewiki.com/wiki/APTicket) may be included as a signature of the file's contents.
 
+For more info on the 'ftab' format see [this article](https://www.theiphonewiki.com/wiki/FTAB_File_Format).
+
 ## Building 'ftab' files
 
 **ftabutil** introduces a concept of manifest — a TOML description of the 'ftab' file fields and contents. Manifests are automatically produced when unpacking 'ftab' files but can also be created manually. Here's an example of such a manifest: