diff --git a/Cargo.toml b/Cargo.toml
index 62c6f6dd43c60a5a384f616bb47096e73a12a233..8f854bd107560916334ae5feb80b21a69e145b37 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -14,9 +14,13 @@ path = "scie-grammar"
 [dependencies.scie_scanner]
 path = "scie-scanner"
 
+[dependencies.scie_onig]
+path = "scie-onig"
+
 [workspace]
 members = [
  "scie-grammar",
  "scie-scanner",
- "benchmark"
+ "benchmark",
+ "scie-onig"
 ]
diff --git a/scie-onig/Cargo.toml b/scie-onig/Cargo.toml
new file mode 100644
index 0000000000000000000000000000000000000000..2d0a08d9ad0fe4847ad723b96f72ead43f4a2d4c
--- /dev/null
+++ b/scie-onig/Cargo.toml
@@ -0,0 +1,9 @@
+[package]
+name = "scie-onig"
+version = "0.1.0"
+authors = ["Phodal Huang <h@phodal.com>"]
+edition = "2018"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
diff --git a/scie-onig/src/lib.rs b/scie-onig/src/lib.rs
new file mode 100644
index 0000000000000000000000000000000000000000..e7a11a969c037e00a796aafeff6258501ec15e9a
--- /dev/null
+++ b/scie-onig/src/lib.rs
@@ -0,0 +1,3 @@
+fn main() {
+    println!("Hello, world!");
+}