diff --git a/src/Tiny_httpd_server.ml b/src/Tiny_httpd_server.ml
index 218272df..ba797118 100644
--- a/src/Tiny_httpd_server.ml
+++ b/src/Tiny_httpd_server.ml
@@ -64,6 +64,7 @@ module Meth = struct
     | `POST
     | `HEAD
     | `DELETE
+    | `OPTIONS
   ]
 
   let to_string = function
@@ -72,6 +73,7 @@ module Meth = struct
     | `HEAD -> "HEAD"
     | `POST -> "POST"
     | `DELETE -> "DELETE"
+    | `OPTIONS -> "OPTIONS"
   let pp out s = Format.pp_print_string out (to_string s)
 
   let of_string = function
@@ -80,6 +82,7 @@ module Meth = struct
     | "POST" -> `POST
     | "HEAD" -> `HEAD
     | "DELETE" -> `DELETE
+    | "OPTIONS" -> `OPTIONS
     | s -> bad_reqf 400 "unknown method %S" s
 end
 
diff --git a/src/Tiny_httpd_server.mli b/src/Tiny_httpd_server.mli
index 075e14f7..9f41c376 100644
--- a/src/Tiny_httpd_server.mli
+++ b/src/Tiny_httpd_server.mli
@@ -21,6 +21,7 @@ module Meth : sig
     | `POST
     | `HEAD
     | `DELETE
+    | `OPTIONS
   ]
   (** A HTTP method.
       For now we only handle a subset of these.