diff --git a/src/workerd/io/compatibility-date.capnp b/src/workerd/io/compatibility-date.capnp
index 4f3b2690223..058582552df 100644
--- a/src/workerd/io/compatibility-date.capnp
+++ b/src/workerd/io/compatibility-date.capnp
@@ -8,7 +8,7 @@ using Cxx = import "/capnp/c++.capnp";
 $Cxx.namespace("workerd");
 $Cxx.allowCancellation;
 
-const supportedCompatibilityDate :Text = "2023-08-14";
+const supportedCompatibilityDate :Text = "2023-08-21";
 # Newest compatibility date that can safely be set using code compiled from this repo. Trying to
 # run a Worker with a newer compatibility date than this will fail.
 #