diff --git a/crates/compact-bytes/Cargo.toml b/crates/compact-bytes/Cargo.toml
index ae26a62c..2a4a8354 100644
--- a/crates/compact-bytes/Cargo.toml
+++ b/crates/compact-bytes/Cargo.toml
@@ -2,6 +2,7 @@
 name = "compact-bytes"
 version = "0.1.0"
 edition = "2021"
+license = "MIT"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
diff --git a/crates/loro-common/Cargo.toml b/crates/loro-common/Cargo.toml
index 01293390..2c9014de 100644
--- a/crates/loro-common/Cargo.toml
+++ b/crates/loro-common/Cargo.toml
@@ -2,6 +2,7 @@
 name = "loro-common"
 version = "0.1.0"
 edition = "2021"
+license = "MIT"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
diff --git a/crates/loro-ffi/Cargo.toml b/crates/loro-ffi/Cargo.toml
index 46e1f5c0..89796e00 100644
--- a/crates/loro-ffi/Cargo.toml
+++ b/crates/loro-ffi/Cargo.toml
@@ -3,6 +3,7 @@ name = "loro-ffi"
 version = "0.1.0"
 edition = "2021"
 build = "build.rs"
+license = "MIT"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
diff --git a/crates/loro-internal/Cargo.toml b/crates/loro-internal/Cargo.toml
index 5b844aaf..cb3b50f6 100644
--- a/crates/loro-internal/Cargo.toml
+++ b/crates/loro-internal/Cargo.toml
@@ -2,6 +2,7 @@
 name = "loro-internal"
 version = "0.1.0"
 edition = "2021"
+license = "MIT"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
diff --git a/crates/loro-preload/Cargo.toml b/crates/loro-preload/Cargo.toml
index 7412d9b3..71339e66 100644
--- a/crates/loro-preload/Cargo.toml
+++ b/crates/loro-preload/Cargo.toml
@@ -2,6 +2,7 @@
 name = "loro-preload"
 version = "0.1.0"
 edition = "2021"
+license = "MIT"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
diff --git a/crates/loro-python/Cargo.toml b/crates/loro-python/Cargo.toml
index 66135c92..720dbc51 100644
--- a/crates/loro-python/Cargo.toml
+++ b/crates/loro-python/Cargo.toml
@@ -2,6 +2,7 @@
 name = "pyloro"
 version = "0.1.0"
 edition = "2021"
+license = "MIT"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
diff --git a/crates/loro-wasm/package.json b/crates/loro-wasm/package.json
index dc3ff118..0f2b7bba 100644
--- a/crates/loro-wasm/package.json
+++ b/crates/loro-wasm/package.json
@@ -2,7 +2,14 @@
   "name": "loro-wasm",
   "version": "0.4.1",
   "description": "Loro CRDTs is a high-performance CRDT framework that makes your app state synchronized, collaborative and maintainable effortlessly.",
-  "keywords": ["crdt", "CRDTs", "realtime", "collaboration", "sync", "p2p"],
+  "keywords": [
+    "crdt",
+    "CRDTs",
+    "realtime",
+    "collaboration",
+    "sync",
+    "p2p"
+  ],
   "main": "nodejs/loro_wasm.js",
   "module": "bundler/loro_wasm.js",
   "scripts": {
@@ -10,9 +17,9 @@
   },
   "homepage": "https://loro.dev",
   "author": "",
-  "license": "ISC",
+  "license": "MIT",
   "devDependencies": {
     "vite-plugin-top-level-await": "^1.2.2",
     "vite-plugin-wasm": "^3.1.0"
   }
-}
+}
\ No newline at end of file
diff --git a/loro-js/LICENSE b/loro-js/LICENSE
new file mode 100644
index 00000000..bffe7781
--- /dev/null
+++ b/loro-js/LICENSE
@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2023 Loro
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
diff --git a/loro-js/package.json b/loro-js/package.json
index 8c0a2636..209344e0 100644
--- a/loro-js/package.json
+++ b/loro-js/package.json
@@ -21,7 +21,7 @@
   },
   "author": "Loro",
   "homepage": "https://loro.dev",
-  "license": "ISC",
+  "license": "MIT",
   "dependencies": {
     "loro-wasm": "workspace:*"
   },
@@ -40,4 +40,4 @@
     "vite-plugin-wasm": "^3.2.2",
     "vitest": "^0.34.0"
   }
-}
+}
\ No newline at end of file