diff --git a/doc/configuration.md b/doc/configuration.md
index 6b3785c5..4b6137c3 100644
--- a/doc/configuration.md
+++ b/doc/configuration.md
@@ -85,3 +85,4 @@ The following are reserved configuration variables that modify Appier Extras beh
 | Name | Type | Description |
 | ----- | ----- | ----- |
 | **PREFLIGHT_DATA** | `str` | The default data for the response to be returned to the `OPTIONS` request (defaults to ``). |
+| **PREFLIGHT_MAX_AGE** | `int` | The number of seconds to be used in cache infvalication for the `Cache-Control` headers to be returned to the `OPTIONS` request (defaults to `86400`). |
diff --git a/src/appier_extras/parts/preflight/part.py b/src/appier_extras/parts/preflight/part.py
index c91c777a..5a32130e 100644
--- a/src/appier_extras/parts/preflight/part.py
+++ b/src/appier_extras/parts/preflight/part.py
@@ -46,6 +46,7 @@ class PreflightPart(appier.Part):
     def __init__(self, *args, **kwargs):
         appier.Part.__init__(self, *args, **kwargs)
         self.data = appier.conf("PREFLIGHT_DATA", "")
+        self.max_age = appier.conf("PREFLIGHT_MAX_AGE", 86400, cast = int)
         self.data_b = appier.legacy.bytes(self.data, force = True)
 
     def version(self):
@@ -66,4 +67,5 @@ def _handler(self):
         if self.owner.request.handled: return
         allow_headers = self.request.get_header("Access-Control-Request-Headers", None)
         if allow_headers: self.request.set_header("Access-Control-Allow-Headers", allow_headers)
+        self.request.set_cache_control("public, max-age=%d" % self.max_age)
         self.owner.request.handle(self.data_b)