diff --git a/.github/workflows/Release.yml b/.github/workflows/Release.yml
index 3deb8b9..08c8196 100644
--- a/.github/workflows/Release.yml
+++ b/.github/workflows/Release.yml
@@ -141,6 +141,11 @@ jobs:
           cargo install --path . --force
           cd ../..
 
+      - name: Install cargo-expand
+        if: steps.check_asset.outputs.skip_build != 'true'
+        run: |
+          cargo install cargo-expand
+
       - name: Cache Flutter dependencies (Linux/Android)
         if: steps.check_asset.outputs.skip_build != 'true' && ( matrix.config.target == 'android-arm32' || matrix.config.target == 'android-arm64' || matrix.config.target == 'android-x86_64' || matrix.config.target == 'linux' )
         uses: actions/cache@v3
diff --git a/ci/src/check_asset/main.rs b/ci/src/check_asset/main.rs
index 78c7c30..3b62565 100644
--- a/ci/src/check_asset/main.rs
+++ b/ci/src/check_asset/main.rs
@@ -3,7 +3,7 @@ use serde_derive::Deserialize;
 use serde_derive::Serialize;
 use serde_json::Value;
 
-const UA: &str = "actions ci";
+use ci::common;
 
 #[tokio::main]
 async fn main() -> Result<()> {
@@ -20,18 +20,11 @@ async fn main() -> Result<()> {
 
     let code = vs_code_txt.trim();
 
-    let release_file_name = match target.as_str() {
-        "macos" => format!("{app_name}-{code}.dmg"),
-        "ios" => format!("{app_name}-{code}-nosign.ipa"),
-        "windows" => format!("{app_name}-{code}-windows-x86_64.zip"),
-        "linux" => format!("{app_name}-{code}-linux-x86_64.AppImage"),
-        "android-arm32" => format!("{app_name}-{code}-arm32.apk"),
-        "android-arm64" => format!("{app_name}-{code}-arm64.apk"),
-        "android-x86_64" => format!("{app_name}-{code}-x86_64.apk"),
-        un => panic!("unknown target : {target}"),
-    };
+    let release_file_name = common::asset_name(app_name, code, target.as_str());
 
-    let client = reqwest::ClientBuilder::new().user_agent(UA).build()?;
+    let client = reqwest::ClientBuilder::new()
+        .user_agent(common::UA)
+        .build()?;
 
     let check_response = client
         .get(format!(
diff --git a/ci/src/common.rs b/ci/src/common.rs
new file mode 100644
index 0000000..b5f3c63
--- /dev/null
+++ b/ci/src/common.rs
@@ -0,0 +1,14 @@
+pub const UA: &str = "github actions";
+
+pub fn asset_name(app_name: &str, code: &str, target: &str) -> String {
+    match target {
+        "macos" => format!("{app_name}-{code}.dmg"),
+        "ios" => format!("{app_name}-{code}-nosign.ipa"),
+        "windows" => format!("{app_name}-{code}-windows-x86_64.zip"),
+        "linux" => format!("{app_name}-{code}-linux-x86_64.AppImage"),
+        "android-arm32" => format!("{app_name}-{code}-arm32.apk"),
+        "android-arm64" => format!("{app_name}-{code}-arm64.apk"),
+        "android-x86_64" => format!("{app_name}-{code}-x86_64.apk"),
+        un => panic!("unknown target : {un}"),
+    }
+}
diff --git a/ci/src/lib.rs b/ci/src/lib.rs
new file mode 100644
index 0000000..34994bf
--- /dev/null
+++ b/ci/src/lib.rs
@@ -0,0 +1 @@
+pub mod common;
diff --git a/ci/src/main.rs b/ci/src/main.rs
deleted file mode 100644
index e7a11a9..0000000
--- a/ci/src/main.rs
+++ /dev/null
@@ -1,3 +0,0 @@
-fn main() {
-    println!("Hello, world!");
-}
diff --git a/ci/src/upload_asset/main.rs b/ci/src/upload_asset/main.rs
index 2aa65c1..1e1f569 100644
--- a/ci/src/upload_asset/main.rs
+++ b/ci/src/upload_asset/main.rs
@@ -1,10 +1,9 @@
 use anyhow::Result;
+use ci::common;
 use serde_derive::Deserialize;
 use serde_derive::Serialize;
 use serde_json::Value;
 
-const UA: &str = "github actions";
-
 #[tokio::main]
 async fn main() -> Result<()> {
     let gh_token = std::env::var("GITHUB_TOKEN")?;
@@ -26,16 +25,7 @@ async fn main() -> Result<()> {
 
     let code = vs_code_txt.trim();
 
-    let release_file_name = match target.as_str() {
-        "macos" => format!("{app_name}-{code}.dmg"),
-        "ios" => format!("{app_name}-{code}-nosign.ipa"),
-        "windows" => format!("{app_name}-{code}-windows-x86_64.zip"),
-        "linux" => format!("{app_name}-{code}-linux-x86_64.AppImage"),
-        "android-arm32" => format!("{app_name}-{code}-arm32.apk"),
-        "android-arm64" => format!("{app_name}-{code}-arm64.apk"),
-        "android-x86_64" => format!("{app_name}-{code}-x86_64.apk"),
-        un => panic!("unknown target : {target}"),
-    };
+    let release_file_name = common::asset_name(app_name, code, target.as_str());
 
     let local_path = match target.as_str() {
         "macos" => "../build/macos.dmg",
@@ -48,7 +38,9 @@ async fn main() -> Result<()> {
         un => panic!("unknown target : {}", un),
     };
 
-    let client = reqwest::ClientBuilder::new().user_agent(UA).build()?;
+    let client = reqwest::ClientBuilder::new()
+        .user_agent(common::UA)
+        .build()?;
 
     let check_response = client
         .get(format!(