diff --git a/src/wasm_sandbox/guests/javascript/package-lock.json b/src/wasm_sandbox/guests/javascript/package-lock.json
index 2ec91dc..43e4d63 100644
--- a/src/wasm_sandbox/guests/javascript/package-lock.json
+++ b/src/wasm_sandbox/guests/javascript/package-lock.json
@@ -9,7 +9,7 @@
       "version": "0.5.0",
       "devDependencies": {
         "@bytecodealliance/componentize-js": "^0.22.0",
-        "@bytecodealliance/jco": "^1.27.0"
+        "@bytecodealliance/jco": "^1.29.0"
       }
     },
     "node_modules/@andreiltd/componentize-qjs-binding-darwin-arm64": {
@@ -199,15 +199,15 @@
       }
     },
     "node_modules/@bytecodealliance/jco": {
-      "version": "1.28.1",
-      "resolved": "https://registry.npmjs.org/@bytecodealliance/jco/-/jco-1.28.1.tgz",
-      "integrity": "sha512-K6STS3cFzfDup+OKYgbRrHdd2BfavUaxu36xK2IL91s3oPBV9mf6ZFVHvAJp8qpj5PkF62DfY3O+ydIduQWj7w==",
+      "version": "1.29.0",
+      "resolved": "https://registry.npmjs.org/@bytecodealliance/jco/-/jco-1.29.0.tgz",
+      "integrity": "sha512-4iJIYa74x0byZkgkc74/+nIdlMBXkSk3I9D6SGAcjhRLK2tx5a5tBsANijQ8MNLU3GODnmObZJX76DYHIF79Zg==",
       "dev": true,
       "license": "(Apache-2.0 WITH LLVM-exception)",
       "dependencies": {
         "@bytecodealliance/componentize-js": "^0.22.0",
         "@bytecodealliance/componentize-js-0-19-3": "npm:@bytecodealliance/componentize-js@^0.19.3",
-        "@bytecodealliance/jco-transpile": "^0.7.0",
+        "@bytecodealliance/jco-transpile": "^0.8.0",
         "@bytecodealliance/preview2-shim": "^0.20.1",
         "@bytecodealliance/preview3-shim": "^0.3.0",
         "binaryen": "^130.0.0",
@@ -222,9 +222,9 @@
       }
     },
     "node_modules/@bytecodealliance/jco-transpile": {
-      "version": "0.7.0",
-      "resolved": "https://registry.npmjs.org/@bytecodealliance/jco-transpile/-/jco-transpile-0.7.0.tgz",
-      "integrity": "sha512-FCUUB2IgENQGfaSTfKLsx0Q8L95K2MpaJBcF6AGOBtCZndWWUkcvtHW3cu5MTVYOCfd6S5itMADSXaK2RWsJ7A==",
+      "version": "0.8.0",
+      "resolved": "https://registry.npmjs.org/@bytecodealliance/jco-transpile/-/jco-transpile-0.8.0.tgz",
+      "integrity": "sha512-tnCkIAzj6CCKl0lZIO9FHQee3gWxgjPgfNlWN4vjYppBN4v1TsbAgN3LD7sBE2GJsozQz2hXzqivO8P0w5j9xg==",
       "dev": true,
       "license": "(Apache-2.0 WITH LLVM-exception)",
       "dependencies": {
diff --git a/src/wasm_sandbox/guests/javascript/package.json b/src/wasm_sandbox/guests/javascript/package.json
index ccfd3f7..688bd52 100644
--- a/src/wasm_sandbox/guests/javascript/package.json
+++ b/src/wasm_sandbox/guests/javascript/package.json
@@ -8,6 +8,6 @@
   },
   "devDependencies": {
     "@bytecodealliance/componentize-js": "^0.22.0",
-    "@bytecodealliance/jco": "^1.27.0"
+    "@bytecodealliance/jco": "^1.29.0"
   }
 }