1 files changed, 5 insertions, 0 deletions
diff --git a/readme.md b/readme.md
index f93438d..fa7587a 100644
--- a/readme.md
+++ b/readme.md
@@ -292,6 +292,11 @@ themselves; in that case the request is passed on.
     - `!exec <path>`: Invokes a script like CGI would but expects no output.
   - `next`: Inner handler. (module)
 
+- **module `semaphore`**
+  - Limits the number of requests processed in parallel
+  - `permits`: Permit count (number)
+  - `next`: Inner handler. (module)
+
 - **module `debug`**
   - Replies with information about the request to debug. Includes source
     address, HTTP version, method, URI and headers.