diff --git a/Cargo.lock b/Cargo.lock
index a87c638a5f..6de9eb453e 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -5065,6 +5065,7 @@ dependencies = [
  "task",
  "toml 0.8.20",
  "util",
+ "wasi-preview1-component-adapter-provider",
  "wasm-encoder 0.221.3",
  "wasmparser 0.221.3",
  "wit-component 0.221.3",
@@ -16211,6 +16212,12 @@ dependencies = [
  "wit-bindgen-rt 0.39.0",
 ]
 
+[[package]]
+name = "wasi-preview1-component-adapter-provider"
+version = "29.0.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "dcd9f21bbde82ba59e415a8725e6ad0d0d7e9e460b1a3ccbca5bdee952c1a324"
+
 [[package]]
 name = "wasite"
 version = "0.1.0"
diff --git a/Cargo.toml b/Cargo.toml
index 29a43d69c8..97c076eb89 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -594,6 +594,7 @@ url = "2.2"
 urlencoding = "2.1.2"
 uuid = { version = "1.1.2", features = ["v4", "v5", "v7", "serde"] }
 walkdir = "2.3"
+wasi-preview1-component-adapter-provider = "29"
 wasm-encoder = "0.221"
 wasmparser = "0.221"
 wasmtime = { version = "29", default-features = false, features = [
diff --git a/crates/extension/Cargo.toml b/crates/extension/Cargo.toml
index eae0147632..f712f837d3 100644
--- a/crates/extension/Cargo.toml
+++ b/crates/extension/Cargo.toml
@@ -33,6 +33,7 @@ serde_json.workspace = true
 task.workspace = true
 toml.workspace = true
 util.workspace = true
+wasi-preview1-component-adapter-provider.workspace = true
 wasm-encoder.workspace = true
 wasmparser.workspace = true
 wit-component.workspace = true
diff --git a/crates/extension/src/extension_builder.rs b/crates/extension/src/extension_builder.rs
index c6636f03d2..34bf30363a 100644
--- a/crates/extension/src/extension_builder.rs
+++ b/crates/extension/src/extension_builder.rs
@@ -4,7 +4,6 @@ use crate::{
 use anyhow::{Context as _, Result, anyhow, bail};
 use async_compression::futures::bufread::GzipDecoder;
 use async_tar::Archive;
-use futures::AsyncReadExt;
 use futures::io::BufReader;
 use heck::ToSnakeCase;
 use http_client::{self, AsyncBody, HttpClient};
@@ -15,6 +14,7 @@ use std::{
     process::Stdio,
     sync::Arc,
 };
+use wasi_preview1_component_adapter_provider::WASI_SNAPSHOT_PREVIEW1_REACTOR_ADAPTER;
 use wasm_encoder::{ComponentSectionId, Encode as _, RawSection, Section as _};
 use wasmparser::Parser;
 use wit_component::ComponentEncoder;
@@ -26,7 +26,6 @@ use wit_component::ComponentEncoder;
 /// Once Rust 1.78 is released, there will be a `wasm32-wasip2` target available, so we will
 /// not need the adapter anymore.
 const RUST_TARGET: &str = "wasm32-wasip1";
-const WASI_ADAPTER_URL: &str = "https://github.com/bytecodealliance/wasmtime/releases/download/v18.0.2/wasi_snapshot_preview1.reactor.wasm";
 
 /// Compiling Tree-sitter parsers from C to WASM requires Clang 17, and a WASM build of libc
 /// and clang's runtime library. The `wasi-sdk` provides these binaries.
@@ -137,7 +136,6 @@ impl ExtensionBuilder {
         options: CompileExtensionOptions,
     ) -> Result<(), anyhow::Error> {
         self.install_rust_wasm_target_if_needed()?;
-        let adapter_bytes = self.install_wasi_preview1_adapter_if_needed().await?;
 
         let cargo_toml_content = fs::read_to_string(extension_dir.join("Cargo.toml"))?;
         let cargo_toml: CargoToml = toml::from_str(&cargo_toml_content)?;
@@ -186,7 +184,10 @@ impl ExtensionBuilder {
 
         let mut encoder = ComponentEncoder::default()
             .module(&wasm_bytes)?
-            .adapter("wasi_snapshot_preview1", &adapter_bytes)
+            .adapter(
+                "wasi_snapshot_preview1",
+                WASI_SNAPSHOT_PREVIEW1_REACTOR_ADAPTER,
+            )
             .context("failed to load adapter module")?
             .validate(true);
 
@@ -395,38 +396,6 @@ impl ExtensionBuilder {
         Ok(())
     }
 
-    async fn install_wasi_preview1_adapter_if_needed(&self) -> Result<Vec<u8>> {
-        let cache_path = self.cache_dir.join("wasi_snapshot_preview1.reactor.wasm");
-        if let Ok(content) = fs::read(&cache_path) {
-            if Parser::is_core_wasm(&content) {
-                return Ok(content);
-            }
-        }
-
-        fs::remove_file(&cache_path).ok();
-
-        log::info!(
-            "downloading wasi adapter module to {}",
-            cache_path.display()
-        );
-        let mut response = self
-            .http
-            .get(WASI_ADAPTER_URL, AsyncBody::default(), true)
-            .await?;
-
-        let mut content = Vec::new();
-        let mut body = BufReader::new(response.body_mut());
-        body.read_to_end(&mut content).await?;
-
-        fs::write(&cache_path, &content)
-            .with_context(|| format!("failed to save file {}", cache_path.display()))?;
-
-        if !Parser::is_core_wasm(&content) {
-            bail!("downloaded wasi adapter is invalid");
-        }
-        Ok(content)
-    }
-
     async fn install_wasi_sdk_if_needed(&self) -> Result<PathBuf> {
         let url = if let Some(asset_name) = WASI_SDK_ASSET_NAME {
             format!("{WASI_SDK_URL}/{asset_name}")