diff --git a/src/pe/certificate_table.rs b/src/pe/certificate_table.rs
index 6b5e87bf9..4eb2d8a21 100644
--- a/src/pe/certificate_table.rs
+++ b/src/pe/certificate_table.rs
@@ -1,3 +1,7 @@
+/// Implements parsing of pe32's Attribute Certificate Table
+/// See reference:
+/// https://learn.microsoft.com/en-us/windows/win32/debug/pe-format#the-attribute-certificate-table-image-only
+/// https://learn.microsoft.com/en-us/windows/win32/api/wintrust/ns-wintrust-win_certificate
 use crate::error;
 use scroll::Pread;