diff --git a/Cargo.lock b/Cargo.lock
index 3166cb2b4e08..d431f578928f 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -841,7 +841,7 @@ dependencies = [
  "serde_derive",
  "smallvec",
  "target-lexicon",
- "wasmparser 0.212.0",
+ "wasmparser",
  "wasmtime-types",
  "wat",
 ]
@@ -2094,9 +2094,9 @@ dependencies = [
 
 [[package]]
 name = "prettyplease"
-version = "0.2.19"
+version = "0.2.20"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5ac2cf0f2e4f42b49f5ffd07dae8d746508ef7526c13940e5f524012ae6c6550"
+checksum = "5f12335488a2f3b0a83b14edad48dca9879ce89b2edd10e80237e4e852dd645e"
 dependencies = [
  "proc-macro2",
  "syn 2.0.60",
@@ -2752,7 +2752,7 @@ dependencies = [
  "cargo_metadata",
  "heck 0.4.0",
  "wasmtime",
- "wit-component 0.212.0",
+ "wit-component",
 ]
 
 [[package]]
@@ -3082,7 +3082,7 @@ name = "verify-component-adapter"
 version = "24.0.0"
 dependencies = [
  "anyhow",
- "wasmparser 0.212.0",
+ "wasmparser",
  "wat",
 ]
 
@@ -3175,7 +3175,7 @@ dependencies = [
  "byte-array-literals",
  "object 0.36.0",
  "wasi",
- "wasm-encoder 0.212.0",
+ "wasm-encoder",
  "wit-bindgen-rust-macro",
 ]
 
@@ -3233,15 +3233,6 @@ version = "0.2.87"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "ca6ad05a4870b2bf5fe995117d3728437bd27d7cd5f06f13c17443ef369775a1"
 
-[[package]]
-name = "wasm-encoder"
-version = "0.209.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7b4a05336882dae732ce6bd48b7e11fe597293cb72c13da4f35d7d5f8d53b2a7"
-dependencies = [
- "leb128",
-]
-
 [[package]]
 name = "wasm-encoder"
 version = "0.212.0"
@@ -3249,23 +3240,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "501940df4418b8929eb6d52f1aade1fdd15a5b86c92453cb696e3c906bd3fc33"
 dependencies = [
  "leb128",
- "wasmparser 0.212.0",
-]
-
-[[package]]
-name = "wasm-metadata"
-version = "0.209.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4d32029ce424f6d3c2b39b4419fb45a0e2d84fb0751e0c0a32b7ce8bd5d97f46"
-dependencies = [
- "anyhow",
- "indexmap 2.2.6",
- "serde",
- "serde_derive",
- "serde_json",
- "spdx",
- "wasm-encoder 0.209.1",
- "wasmparser 0.209.1",
+ "wasmparser",
 ]
 
 [[package]]
@@ -3280,8 +3255,8 @@ dependencies = [
  "serde_derive",
  "serde_json",
  "spdx",
- "wasm-encoder 0.212.0",
- "wasmparser 0.212.0",
+ "wasm-encoder",
+ "wasmparser",
 ]
 
 [[package]]
@@ -3294,8 +3269,8 @@ dependencies = [
  "log",
  "rand",
  "thiserror",
- "wasm-encoder 0.212.0",
- "wasmparser 0.212.0",
+ "wasm-encoder",
+ "wasmparser",
 ]
 
 [[package]]
@@ -3309,7 +3284,7 @@ dependencies = [
  "flagset",
  "indexmap 2.2.6",
  "leb128",
- "wasm-encoder 0.212.0",
+ "wasm-encoder",
 ]
 
 [[package]]
@@ -3352,19 +3327,6 @@ dependencies = [
  "paste",
 ]
 
-[[package]]
-name = "wasmparser"
-version = "0.209.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "07035cc9a9b41e62d3bb3a3815a66ab87c993c06fe1cf6b2a3f2a18499d937db"
-dependencies = [
- "ahash",
- "bitflags 2.4.1",
- "hashbrown 0.14.3",
- "indexmap 2.2.6",
- "semver",
-]
-
 [[package]]
 name = "wasmparser"
 version = "0.212.0"
@@ -3396,7 +3358,7 @@ checksum = "dfac65326cc561112af88c3028f6dfdb140acff67ede33a8e86be2dc6b8956f7"
 dependencies = [
  "anyhow",
  "termcolor",
- "wasmparser 0.212.0",
+ "wasmparser",
 ]
 
 [[package]]
@@ -3440,8 +3402,8 @@ dependencies = [
  "target-lexicon",
  "tempfile",
  "wasi-common",
- "wasm-encoder 0.212.0",
- "wasmparser 0.212.0",
+ "wasm-encoder",
+ "wasmparser",
  "wasmtime-asm-macros",
  "wasmtime-cache",
  "wasmtime-component-macro",
@@ -3583,7 +3545,7 @@ dependencies = [
  "tracing",
  "walkdir",
  "wasi-common",
- "wasmparser 0.212.0",
+ "wasmparser",
  "wasmtime",
  "wasmtime-cache",
  "wasmtime-cli-flags",
@@ -3600,7 +3562,7 @@ dependencies = [
  "wast 212.0.0",
  "wat",
  "windows-sys 0.52.0",
- "wit-component 0.212.0",
+ "wit-component",
 ]
 
 [[package]]
@@ -3633,7 +3595,7 @@ dependencies = [
  "wasmtime",
  "wasmtime-component-util",
  "wasmtime-wit-bindgen",
- "wit-parser 0.212.0",
+ "wit-parser",
 ]
 
 [[package]]
@@ -3657,7 +3619,7 @@ dependencies = [
  "object 0.36.0",
  "target-lexicon",
  "thiserror",
- "wasmparser 0.212.0",
+ "wasmparser",
  "wasmtime-environ",
  "wasmtime-versioned-export-macros",
 ]
@@ -3682,8 +3644,8 @@ dependencies = [
  "serde",
  "serde_derive",
  "target-lexicon",
- "wasm-encoder 0.212.0",
- "wasmparser 0.212.0",
+ "wasm-encoder",
+ "wasmparser",
  "wasmprinter",
  "wasmtime-component-util",
  "wasmtime-types",
@@ -3698,7 +3660,7 @@ dependencies = [
  "component-fuzz-util",
  "env_logger",
  "libfuzzer-sys",
- "wasmparser 0.212.0",
+ "wasmparser",
  "wasmprinter",
  "wasmtime-environ",
  "wat",
@@ -3756,7 +3718,7 @@ dependencies = [
  "rand",
  "smallvec",
  "target-lexicon",
- "wasmparser 0.212.0",
+ "wasmparser",
  "wasmtime",
  "wasmtime-fuzzing",
 ]
@@ -3777,12 +3739,12 @@ dependencies = [
  "target-lexicon",
  "tempfile",
  "v8",
- "wasm-encoder 0.212.0",
+ "wasm-encoder",
  "wasm-mutate",
  "wasm-smith",
  "wasm-spec-interpreter",
  "wasmi",
- "wasmparser 0.212.0",
+ "wasmparser",
  "wasmprinter",
  "wasmtime",
  "wasmtime-wast",
@@ -3832,7 +3794,7 @@ dependencies = [
  "serde",
  "serde_derive",
  "smallvec",
- "wasmparser 0.212.0",
+ "wasmparser",
 ]
 
 [[package]]
@@ -3953,7 +3915,7 @@ dependencies = [
  "gimli",
  "object 0.36.0",
  "target-lexicon",
- "wasmparser 0.212.0",
+ "wasmparser",
  "wasmtime-cranelift",
  "wasmtime-environ",
  "winch-codegen",
@@ -3966,7 +3928,7 @@ dependencies = [
  "anyhow",
  "heck 0.4.0",
  "indexmap 2.2.6",
- "wit-parser 0.212.0",
+ "wit-parser",
 ]
 
 [[package]]
@@ -3992,7 +3954,7 @@ dependencies = [
  "leb128",
  "memchr",
  "unicode-width",
- "wasm-encoder 0.212.0",
+ "wasm-encoder",
 ]
 
 [[package]]
@@ -4131,7 +4093,7 @@ dependencies = [
  "regalloc2",
  "smallvec",
  "target-lexicon",
- "wasmparser 0.212.0",
+ "wasmparser",
  "wasmtime-cranelift",
  "wasmtime-environ",
 ]
@@ -4308,9 +4270,9 @@ dependencies = [
 
 [[package]]
 name = "wit-bindgen"
-version = "0.26.0"
+version = "0.27.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a84376ff4f74ed07674a1157c0bd19e6627ab01fc90952a27ccefb52a24530f0"
+checksum = "fabce76bbb8938536c437da0c3e1d4dda9065453f72a68f797c0cb3d67356a28"
 dependencies = [
  "wit-bindgen-rt",
  "wit-bindgen-rust-macro",
@@ -4318,45 +4280,48 @@ dependencies = [
 
 [[package]]
 name = "wit-bindgen-core"
-version = "0.26.0"
+version = "0.27.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "36d4706efb67fadfbbde77955b299b111dd096e6776d8c6561d92f6147941880"
+checksum = "1b43fbdd3497c471bbfb6973b1fb9ffe6949f158248cb43171d6f1cf3de7eaa3"
 dependencies = [
  "anyhow",
  "heck 0.5.0",
- "wit-parser 0.209.1",
+ "wit-parser",
 ]
 
 [[package]]
 name = "wit-bindgen-rt"
-version = "0.26.0"
+version = "0.27.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "29c7526379ace8709ee9ab9f2bb50f112d95581063a59ef3097d9c10153886c9"
+checksum = "75956ff0a04a87ca0526b07199ce3b9baee899f2e4723b5b63aa296ab172ec52"
 dependencies = [
  "bitflags 2.4.1",
 ]
 
 [[package]]
 name = "wit-bindgen-rust"
-version = "0.26.0"
+version = "0.27.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "514295193d1a2f42e6a948cd7d9fd81e2b8fadc319667dcf19fd7aceaf2113a2"
+checksum = "bf509c4ef97b18ec0218741c8318706ac30ff16bc1731f990319a42bbbcfe8e3"
 dependencies = [
  "anyhow",
  "heck 0.5.0",
  "indexmap 2.2.6",
- "wasm-metadata 0.209.1",
+ "prettyplease",
+ "syn 2.0.60",
+ "wasm-metadata",
  "wit-bindgen-core",
- "wit-component 0.209.1",
+ "wit-component",
 ]
 
 [[package]]
 name = "wit-bindgen-rust-macro"
-version = "0.26.0"
+version = "0.27.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f0409a3356ca02599aff78f717968fd7f12df4bf879f325e2a97b45c84c90fff"
+checksum = "88d6f2e025e38395d71fc1bf064e581b2ad275ce322d6f8d87ddc5e76a7b8c42"
 dependencies = [
  "anyhow",
+ "prettyplease",
  "proc-macro2",
  "quote",
  "syn 2.0.60",
@@ -4364,25 +4329,6 @@ dependencies = [
  "wit-bindgen-rust",
 ]
 
-[[package]]
-name = "wit-component"
-version = "0.209.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "25a2bb5b039f9cb03425e1d5a6e54b441ca4ca1b1d4fa6a0924db67a55168f99"
-dependencies = [
- "anyhow",
- "bitflags 2.4.1",
- "indexmap 2.2.6",
- "log",
- "serde",
- "serde_derive",
- "serde_json",
- "wasm-encoder 0.209.1",
- "wasm-metadata 0.209.1",
- "wasmparser 0.209.1",
- "wit-parser 0.209.1",
-]
-
 [[package]]
 name = "wit-component"
 version = "0.212.0"
@@ -4396,28 +4342,10 @@ dependencies = [
  "serde",
  "serde_derive",
  "serde_json",
- "wasm-encoder 0.212.0",
- "wasm-metadata 0.212.0",
- "wasmparser 0.212.0",
- "wit-parser 0.212.0",
-]
-
-[[package]]
-name = "wit-parser"
-version = "0.209.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3e79b9e3c0b6bb589dec46317e645851e0db2734c44e2be5e251b03ff4a51269"
-dependencies = [
- "anyhow",
- "id-arena",
- "indexmap 2.2.6",
- "log",
- "semver",
- "serde",
- "serde_derive",
- "serde_json",
- "unicode-xid",
- "wasmparser 0.209.1",
+ "wasm-encoder",
+ "wasm-metadata",
+ "wasmparser",
+ "wit-parser",
 ]
 
 [[package]]
@@ -4435,7 +4363,7 @@ dependencies = [
  "serde_derive",
  "serde_json",
  "unicode-xid",
- "wasmparser 0.212.0",
+ "wasmparser",
 ]
 
 [[package]]
diff --git a/Cargo.toml b/Cargo.toml
index 4c6c74c9cae4..3043a9320677 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -249,8 +249,8 @@ io-lifetimes = { version = "2.0.3", default-features = false }
 io-extras = "0.18.1"
 rustix = "0.38.31"
 # wit-bindgen:
-wit-bindgen = { version = "0.26.0", default-features = false }
-wit-bindgen-rust-macro = { version = "0.26.0", default-features = false }
+wit-bindgen = { version = "0.27.0", default-features = false }
+wit-bindgen-rust-macro = { version = "0.27.0", default-features = false }
 
 # wasm-tools family:
 wasmparser = { version = "0.212.0", default-features = false }
diff --git a/crates/test-programs/src/bin/api_reactor.rs b/crates/test-programs/src/bin/api_reactor.rs
index 7695dc0aae03..ae8ecf9f939c 100644
--- a/crates/test-programs/src/bin/api_reactor.rs
+++ b/crates/test-programs/src/bin/api_reactor.rs
@@ -1,6 +1,7 @@
 wit_bindgen::generate!({
     world: "test-reactor",
     path: "../wasi/wit",
+    generate_all,
 });
 
 struct T;
diff --git a/crates/test-programs/src/lib.rs b/crates/test-programs/src/lib.rs
index dfa4541a8fc2..2ed2dcb8fe22 100644
--- a/crates/test-programs/src/lib.rs
+++ b/crates/test-programs/src/lib.rs
@@ -3,7 +3,11 @@ pub mod nn;
 pub mod preview1;
 pub mod sockets;
 
-wit_bindgen::generate!("test-command" in "../wasi/wit");
+wit_bindgen::generate!({
+    world: "test-command",
+    path: "../wasi/wit",
+    generate_all,
+});
 
 pub mod proxy {
     wit_bindgen::generate!({
@@ -14,6 +18,15 @@ pub mod proxy {
         with: {
             "wasi:http/types@0.2.0": crate::wasi::http::types,
             "wasi:http/outgoing-handler@0.2.0": crate::wasi::http::outgoing_handler,
+            "wasi:random/random@0.2.0": crate::wasi::random::random,
+            "wasi:io/error@0.2.0": crate::wasi::io::error,
+            "wasi:io/poll@0.2.0": crate::wasi::io::poll,
+            "wasi:io/streams@0.2.0": crate::wasi::io::streams,
+            "wasi:cli/stdout@0.2.0": crate::wasi::cli::stdout,
+            "wasi:cli/stderr@0.2.0": crate::wasi::cli::stderr,
+            "wasi:cli/stdin@0.2.0": crate::wasi::cli::stdin,
+            "wasi:clocks/monotonic-clock@0.2.0": crate::wasi::clocks::monotonic_clock,
+            "wasi:clocks/wall-clock@0.2.0": crate::wasi::clocks::wall_clock,
         },
     });
 }
diff --git a/crates/wasi-preview1-component-adapter/src/lib.rs b/crates/wasi-preview1-component-adapter/src/lib.rs
index 83b0475a20f8..56d1f6e709d6 100644
--- a/crates/wasi-preview1-component-adapter/src/lib.rs
+++ b/crates/wasi-preview1-component-adapter/src/lib.rs
@@ -62,6 +62,7 @@ pub mod bindings {
         // Instead, we manually define the bindings for these functions in
         // terms of raw pointers.
         skip: ["run", "get-environment", "poll"],
+        generate_all,
     });
 
     #[cfg(feature = "reactor")]
@@ -78,6 +79,7 @@ pub mod bindings {
         // Instead, we manually define the bindings for these functions in
         // terms of raw pointers.
         skip: ["get-environment", "poll"],
+        generate_all,
     });
 
     #[cfg(feature = "proxy")]
@@ -99,6 +101,7 @@ pub mod bindings {
         raw_strings,
         runtime_path: "crate::bindings::wit_bindgen_rt_shim",
         skip: ["poll"],
+        generate_all,
     });
 
     pub mod wit_bindgen_rt_shim {
diff --git a/supply-chain/imports.lock b/supply-chain/imports.lock
index b588240c5279..b304b8781856 100644
--- a/supply-chain/imports.lock
+++ b/supply-chain/imports.lock
@@ -1770,6 +1770,13 @@ user-id = 3618
 user-login = "dtolnay"
 user-name = "David Tolnay"
 
+[[publisher.prettyplease]]
+version = "0.2.20"
+when = "2024-05-07"
+user-id = 3618
+user-login = "dtolnay"
+user-name = "David Tolnay"
+
 [[publisher.proc-macro2]]
 version = "1.0.81"
 when = "2024-04-17"
@@ -3542,6 +3549,12 @@ when = "2024-05-30"
 user-id = 73222
 user-login = "wasmtime-publish"
 
+[[publisher.wit-bindgen]]
+version = "0.27.0"
+when = "2024-06-28"
+user-id = 73222
+user-login = "wasmtime-publish"
+
 [[publisher.wit-bindgen-core]]
 version = "0.20.0"
 when = "2024-02-29"
@@ -3566,6 +3579,12 @@ when = "2024-05-30"
 user-id = 73222
 user-login = "wasmtime-publish"
 
+[[publisher.wit-bindgen-core]]
+version = "0.27.0"
+when = "2024-06-28"
+user-id = 73222
+user-login = "wasmtime-publish"
+
 [[publisher.wit-bindgen-rt]]
 version = "0.22.0"
 when = "2024-03-11"
@@ -3584,6 +3603,12 @@ when = "2024-05-30"
 user-id = 73222
 user-login = "wasmtime-publish"
 
+[[publisher.wit-bindgen-rt]]
+version = "0.27.0"
+when = "2024-06-28"
+user-id = 73222
+user-login = "wasmtime-publish"
+
 [[publisher.wit-bindgen-rust]]
 version = "0.20.0"
 when = "2024-02-29"
@@ -3608,6 +3633,12 @@ when = "2024-05-30"
 user-id = 73222
 user-login = "wasmtime-publish"
 
+[[publisher.wit-bindgen-rust]]
+version = "0.27.0"
+when = "2024-06-28"
+user-id = 73222
+user-login = "wasmtime-publish"
+
 [[publisher.wit-bindgen-rust-macro]]
 version = "0.20.0"
 when = "2024-02-29"
@@ -3632,6 +3663,12 @@ when = "2024-05-30"
 user-id = 73222
 user-login = "wasmtime-publish"
 
+[[publisher.wit-bindgen-rust-macro]]
+version = "0.27.0"
+when = "2024-06-28"
+user-id = 73222
+user-login = "wasmtime-publish"
+
 [[publisher.wit-component]]
 version = "0.201.0"
 when = "2024-02-27"