diff --git a/categories-and-types/README.md b/categories-and-types/README.md
index c9c54ac..cd3311f 100644
--- a/categories-and-types/README.md
+++ b/categories-and-types/README.md
@@ -12,6 +12,7 @@
 |bic| | | | | X | |
 |bin| | | | | X | |
 |boolean| | | | | | |
+|bro| | | | X | | |
 |btc| | | | | X | |
 |campaign-id| | | X | | | |
 |campaign-name| | | X | | | |
@@ -166,6 +167,7 @@
 |bic| | | | | | |
 |bin| | | | | | |
 |boolean| | X | | | | |
+|bro| X | | | | | |
 |btc| | | | | | |
 |campaign-id| | | | | | |
 |campaign-name| | | | | | |
@@ -320,6 +322,7 @@
 |bic| | | | |
 |bin| | | | |
 |boolean| | | | |
+|bro| | | | |
 |btc| | | | |
 |campaign-id| | | | |
 |campaign-name| | | | |
@@ -494,6 +497,7 @@
 *   **bic**: Bank Identifier Code Number also known as SWIFT-BIC, SWIFT code or ISO 9362 code
 *   **bin**: Bank Identification Number
 *   **boolean**: Boolean value - to be used in objects
+*   **bro**: An NIDS rule in the Bro rule-format
 *   **btc**: Bitcoin Address
 *   **campaign-id**: Associated campaign ID
 *   **campaign-name**: Associated campaign name