diff --git a/wit/deps.lock b/wit/deps.lock
index 0a05da0..a1d7a27 100644
--- a/wit/deps.lock
+++ b/wit/deps.lock
@@ -1,4 +1,4 @@
 [io]
 url = "https://github.com/WebAssembly/wasi-io/archive/main.tar.gz"
-sha256 = "b622db2755978a49d18d35d84d75f66b2b1ed23d7bf413e5c9e152e190cc7d4b"
-sha512 = "d19c9004e75bf3ebe3e34cff498c3d7fee04cd57a7fba7ed12a0c5ad842ba5715c009de77a152c57da0500f6ca0986b6791b6f022829bdd5a024f7bc114c2ff6"
+sha256 = "7210e5653539a15478f894d4da24cc69d61924cbcba21d2804d69314a88e5a4c"
+sha512 = "49184a1b0945a889abd52d25271172ed3dc2db6968fcdddb1bab7ee0081f4a3eeee0977ad2291126a37631c0d86eeea75d822fa8af224c422134500bf9f0f2bb"
diff --git a/wit/deps/io/error.wit b/wit/deps/io/error.wit
index 31918ac..22e5b64 100644
--- a/wit/deps/io/error.wit
+++ b/wit/deps/io/error.wit
@@ -1,4 +1,4 @@
-package wasi:io@0.2.0-rc-2023-11-10;
+package wasi:io@0.2.0;
 
 
 interface error {
diff --git a/wit/deps/io/poll.wit b/wit/deps/io/poll.wit
index 81b1cab..ddc67f8 100644
--- a/wit/deps/io/poll.wit
+++ b/wit/deps/io/poll.wit
@@ -1,4 +1,4 @@
-package wasi:io@0.2.0-rc-2023-11-10;
+package wasi:io@0.2.0;
 
 /// A poll API intended to let users wait for I/O events on multiple handles
 /// at once.
diff --git a/wit/deps/io/streams.wit b/wit/deps/io/streams.wit
index f6f7fe0..6d2f871 100644
--- a/wit/deps/io/streams.wit
+++ b/wit/deps/io/streams.wit
@@ -1,4 +1,4 @@
-package wasi:io@0.2.0-rc-2023-11-10;
+package wasi:io@0.2.0;
 
 /// WASI I/O is an I/O abstraction API which is currently focused on providing
 /// stream types.
@@ -32,6 +32,11 @@ interface streams {
     resource input-stream {
         /// Perform a non-blocking read from the stream.
         ///
+        /// When the source of a `read` is binary data, the bytes from the source
+        /// are returned verbatim. When the source of a `read` is known to the
+        /// implementation to be text, bytes containing the UTF-8 encoding of the
+        /// text are returned.
+        ///
         /// This function returns a list of bytes containing the read data,
         /// when successful. The returned list will contain up to `len` bytes;
         /// it may return fewer than requested, but not more. The list is
@@ -111,6 +116,12 @@ interface streams {
 
         /// Perform a write. This function never blocks.
         ///
+        /// When the destination of a `write` is binary data, the bytes from
+        /// `contents` are written verbatim. When the destination of a `write` is
+        /// known to the implementation to be text, the bytes of `contents` are
+        /// transcoded from UTF-8 into the encoding of the destination and then
+        /// written.
+        ///
         /// Precondition: check-write gave permit of Ok(n) and contents has a
         /// length of less than or equal to n. Otherwise, this function will trap.
         ///
diff --git a/wit/deps/io/world.wit b/wit/deps/io/world.wit
index 8243da2..5f0b43f 100644
--- a/wit/deps/io/world.wit
+++ b/wit/deps/io/world.wit
@@ -1,4 +1,4 @@
-package wasi:io@0.2.0-rc-2023-11-10;
+package wasi:io@0.2.0;
 
 world imports {
     import streams;