diff --git a/wit/preopens.wit b/wit/preopens.wit
index 3f787ac..95ec678 100644
--- a/wit/preopens.wit
+++ b/wit/preopens.wit
@@ -1,3 +1,5 @@
+package wasi:filesystem@0.2.0-rc-2023-11-10;
+
 interface preopens {
     use types.{descriptor};
 
diff --git a/wit/types.wit b/wit/types.wit
index ab0fd29..059722a 100644
--- a/wit/types.wit
+++ b/wit/types.wit
@@ -1,3 +1,4 @@
+package wasi:filesystem@0.2.0-rc-2023-11-10;
 /// WASI filesystem is a filesystem API primarily intended to let users run WASI
 /// programs that access their files on their existing filesystems, without
 /// significant overhead.
diff --git a/wit/world.wit b/wit/world.wit
index bd47294..285e0ba 100644
--- a/wit/world.wit
+++ b/wit/world.wit
@@ -1,4 +1,4 @@
-package wasi:filesystem;
+package wasi:filesystem@0.2.0-rc-2023-11-10;
 
 world imports {
     import types;