diff --git a/Cargo.lock b/Cargo.lock
index b1d1dc63299c..25457ee41d9c 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1797,7 +1797,6 @@ checksum = "10a35a97730320ffe8e2d410b5d3b69279b98d2c14bdb8b70ea89ecf7888d41e"
 dependencies = [
  "autocfg 1.1.0",
  "hashbrown 0.12.3",
- "serde",
 ]
 
 [[package]]
@@ -2541,17 +2540,6 @@ dependencies = [
  "cc",
 ]
 
-[[package]]
-name = "pulldown-cmark"
-version = "0.8.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ffade02495f22453cd593159ea2f59827aae7f53fa8323f756799b670881dcf8"
-dependencies = [
- "bitflags 1.3.2",
- "memchr",
- "unicase",
-]
-
 [[package]]
 name = "pulldown-cmark"
 version = "0.9.3"
@@ -3794,9 +3782,9 @@ checksum = "ca6ad05a4870b2bf5fe995117d3728437bd27d7cd5f06f13c17443ef369775a1"
 
 [[package]]
 name = "wasm-encoder"
-version = "0.29.0"
+version = "0.30.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "18c41dbd92eaebf3612a39be316540b8377c871cb9bde6b064af962984912881"
+checksum = "b2f8e9778e04cbf44f58acc301372577375a666b966c50b03ef46144f80436a8"
 dependencies = [
  "leb128",
 ]
@@ -3812,15 +3800,17 @@ dependencies = [
 
 [[package]]
 name = "wasm-metadata"
-version = "0.8.0"
+version = "0.9.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "36e5156581ff4a302405c44ca7c85347563ca431d15f1a773f12c9c7b9a6cdc9"
+checksum = "d51db59397fc650b5f2fc778e4a5c4456cd856bed7fc1ec15f8d3e28229dc463"
 dependencies = [
  "anyhow",
- "indexmap 1.9.1",
+ "indexmap 2.0.0",
  "serde",
- "wasm-encoder 0.29.0",
- "wasmparser 0.107.0",
+ "serde_json",
+ "spdx",
+ "wasm-encoder 0.30.0",
+ "wasmparser 0.108.0",
 ]
 
 [[package]]
@@ -3915,11 +3905,11 @@ dependencies = [
 
 [[package]]
 name = "wasmparser"
-version = "0.107.0"
+version = "0.108.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "29e3ac9b780c7dda0cac7a52a5d6d2d6707cc6e3451c9db209b6c758f40d7acb"
+checksum = "76c956109dcb41436a39391139d9b6e2d0a5e0b158e1293ef352ec977e5e36c5"
 dependencies = [
- "indexmap 1.9.1",
+ "indexmap 2.0.0",
  "semver",
 ]
 
@@ -4138,7 +4128,7 @@ dependencies = [
  "wasmtime",
  "wasmtime-component-util",
  "wasmtime-wit-bindgen",
- "wit-parser 0.9.2",
+ "wit-parser",
 ]
 
 [[package]]
@@ -4502,7 +4492,7 @@ version = "12.0.0"
 dependencies = [
  "anyhow",
  "heck",
- "wit-parser 0.9.2",
+ "wit-parser",
 ]
 
 [[package]]
@@ -4790,9 +4780,9 @@ dependencies = [
 
 [[package]]
 name = "wit-bindgen"
-version = "0.7.0"
+version = "0.9.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a628591b3905328e886462f75de3b2af1e546b19af5f4c359086b26bec29c4bd"
+checksum = "f5c3d15a04ce994fad2c5442a754b404ab1fee23c903a04a560f84f94fdf63c0"
 dependencies = [
  "bitflags 2.3.3",
  "wit-bindgen-rust-macro",
@@ -4800,33 +4790,33 @@ dependencies = [
 
 [[package]]
 name = "wit-bindgen-core"
-version = "0.7.0"
+version = "0.9.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "34a19aa69c4f33cb5ac10e55880a899f4d52ec85d4cde4d593b575e7a97e2b08"
+checksum = "c9658ec54d4a3c9e2f079bc65a131093337595b595fbf82f805008469838cdea"
 dependencies = [
  "anyhow",
- "wit-component 0.11.0",
- "wit-parser 0.8.0",
+ "wit-component 0.12.0",
+ "wit-parser",
 ]
 
 [[package]]
 name = "wit-bindgen-rust"
-version = "0.7.0"
+version = "0.9.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9a50274c0cf2f8e33fc967825cef0114cdfe222d474c1d78aa77a6a801abaadf"
+checksum = "21ae6a6198ba9765771b977e2af985a0d5ac71b59f999da5c4ee1c7bbd8ca8dc"
 dependencies = [
  "heck",
- "wasm-metadata 0.8.0",
+ "wasm-metadata 0.9.0",
  "wit-bindgen-core",
  "wit-bindgen-rust-lib",
- "wit-component 0.11.0",
+ "wit-component 0.12.0",
 ]
 
 [[package]]
 name = "wit-bindgen-rust-lib"
-version = "0.7.0"
+version = "0.9.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9d3d58b5ced269f1a1cdcecfe0317c059fe158da9b670fff9907903b244bb89a"
+checksum = "5c31de8c6c77cac1fd4927c7584d1314cd5e838cfb40b53333d6dffc7a132dda"
 dependencies = [
  "heck",
  "wit-bindgen-core",
@@ -4834,32 +4824,33 @@ dependencies = [
 
 [[package]]
 name = "wit-bindgen-rust-macro"
-version = "0.7.0"
+version = "0.9.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "78cce32dd08007af45dbaa00e225eb73d05524096f93933d7ecba852d50d8af3"
+checksum = "0a2abe5c7c4c08468d01590aa96c8a684dd94fb9241a248af88eef7edac61e43"
 dependencies = [
  "anyhow",
  "proc-macro2",
  "syn 2.0.25",
  "wit-bindgen-core",
  "wit-bindgen-rust",
- "wit-component 0.11.0",
+ "wit-bindgen-rust-lib",
+ "wit-component 0.12.0",
 ]
 
 [[package]]
 name = "wit-component"
-version = "0.11.0"
+version = "0.12.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7cbd4c7f8f400327c482c88571f373844b7889e61460650d650fc5881bb3575c"
+checksum = "253bd426c532f1cae8c633c517c63719920535f3a7fada3589de40c5b734e393"
 dependencies = [
  "anyhow",
  "bitflags 1.3.2",
- "indexmap 1.9.1",
+ "indexmap 2.0.0",
  "log",
- "wasm-encoder 0.29.0",
- "wasm-metadata 0.8.0",
- "wasmparser 0.107.0",
- "wit-parser 0.8.0",
+ "wasm-encoder 0.30.0",
+ "wasm-metadata 0.9.0",
+ "wasmparser 0.108.0",
+ "wit-parser",
 ]
 
 [[package]]
@@ -4875,23 +4866,7 @@ dependencies = [
  "wasm-encoder 0.31.1",
  "wasm-metadata 0.10.1",
  "wasmparser 0.110.0",
- "wit-parser 0.9.2",
-]
-
-[[package]]
-name = "wit-parser"
-version = "0.8.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6daec9f093dbaea0e94043eeb92ece327bbbe70c86b1f41aca9bbfefd7f050f0"
-dependencies = [
- "anyhow",
- "id-arena",
- "indexmap 1.9.1",
- "log",
- "pulldown-cmark 0.8.0",
- "semver",
- "unicode-xid",
- "url",
+ "wit-parser",
 ]
 
 [[package]]
@@ -4904,7 +4879,7 @@ dependencies = [
  "id-arena",
  "indexmap 2.0.0",
  "log",
- "pulldown-cmark 0.9.3",
+ "pulldown-cmark",
  "semver",
  "unicode-xid",
  "url",
diff --git a/Cargo.toml b/Cargo.toml
index bd7c2ea569fc..c40532c4fe68 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -199,7 +199,7 @@ io-extras = "0.18.0"
 rustix = "0.38.4"
 
 # wit-bindgen:
-wit-bindgen = { version = "0.7.0", default-features = false }
+wit-bindgen = { version = "0.9.0", default-features = false }
 
 # wasm-tools family:
 wasmparser = "0.110.0"
diff --git a/crates/test-programs/wasi-http-tests/src/bin/outbound_request.rs b/crates/test-programs/wasi-http-tests/src/bin/outbound_request.rs
index 4062d370a122..7987c0dada23 100644
--- a/crates/test-programs/wasi-http-tests/src/bin/outbound_request.rs
+++ b/crates/test-programs/wasi-http-tests/src/bin/outbound_request.rs
@@ -37,8 +37,8 @@ fn request(
     body: &[u8],
 ) -> Result<Response> {
     let headers = wasi::http::types::new_fields(&[
-        ("User-agent", "WASI-HTTP/0.0.1"),
-        ("Content-type", "application/json"),
+        ("User-agent".to_string(), "WASI-HTTP/0.0.1".to_string()),
+        ("Content-type".to_string(), "application/json".to_string()),
     ]);
 
     let request = wasi::http::types::new_outgoing_request(
diff --git a/supply-chain/imports.lock b/supply-chain/imports.lock
index 0befa606d7c2..14f8c6d384d6 100644
--- a/supply-chain/imports.lock
+++ b/supply-chain/imports.lock
@@ -1663,6 +1663,13 @@ user-id = 1
 user-login = "alexcrichton"
 user-name = "Alex Crichton"
 
+[[publisher.wit-bindgen]]
+version = "0.9.0"
+when = "2023-07-15"
+user-id = 1
+user-login = "alexcrichton"
+user-name = "Alex Crichton"
+
 [[publisher.wit-bindgen-core]]
 version = "0.7.0"
 when = "2023-05-26"
@@ -1670,6 +1677,13 @@ user-id = 1
 user-login = "alexcrichton"
 user-name = "Alex Crichton"
 
+[[publisher.wit-bindgen-core]]
+version = "0.9.0"
+when = "2023-07-15"
+user-id = 1
+user-login = "alexcrichton"
+user-name = "Alex Crichton"
+
 [[publisher.wit-bindgen-rust]]
 version = "0.7.0"
 when = "2023-05-26"
@@ -1677,6 +1691,13 @@ user-id = 1
 user-login = "alexcrichton"
 user-name = "Alex Crichton"
 
+[[publisher.wit-bindgen-rust]]
+version = "0.9.0"
+when = "2023-07-15"
+user-id = 1
+user-login = "alexcrichton"
+user-name = "Alex Crichton"
+
 [[publisher.wit-bindgen-rust-lib]]
 version = "0.7.0"
 when = "2023-05-26"
@@ -1684,6 +1705,13 @@ user-id = 1
 user-login = "alexcrichton"
 user-name = "Alex Crichton"
 
+[[publisher.wit-bindgen-rust-lib]]
+version = "0.9.0"
+when = "2023-07-15"
+user-id = 1
+user-login = "alexcrichton"
+user-name = "Alex Crichton"
+
 [[publisher.wit-bindgen-rust-macro]]
 version = "0.7.0"
 when = "2023-05-26"
@@ -1691,6 +1719,13 @@ user-id = 1
 user-login = "alexcrichton"
 user-name = "Alex Crichton"
 
+[[publisher.wit-bindgen-rust-macro]]
+version = "0.9.0"
+when = "2023-07-15"
+user-id = 1
+user-login = "alexcrichton"
+user-name = "Alex Crichton"
+
 [[publisher.wit-component]]
 version = "0.11.0"
 when = "2023-05-26"