diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index b5f7f9f..8784121 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -39,12 +39,13 @@ jobs:
           path: |
             ~/.gradle/caches/
             ~/.gradle/wrapper/
+            ./.gradle/
           key: ${{ hashFiles('gradle/wrapper/gradle-wrapper.properties') }}
 
       - name: Set environments
         run: |
           {
-            echo "version=v$(grep versionName app/build.gradle | awk '{print $2}' | tr -d \")"
+            echo "version=v$(grep -oP 'versionName "\K[^"]+' app/build.gradle)"
             echo "commit=$(echo ${{ github.sha }} | cut -c-7)"
             echo "repo=$(echo ${GITHUB_REPOSITORY#$GITHUB_REPOSITORY_OWNER/})"
           } >> $GITHUB_ENV
@@ -59,36 +60,34 @@ jobs:
       - name: Release check
         if: github.event.inputs.release == 'true'
         run: |
-          if [[ "${{ secrets.STORE_FILE }}" == "" ]]; then
-            echo -e "\nERROR!\nリリースするには､ 署名鍵を設定する必要があります｡\n"
-            echo "STORE_FILE: JKS形式の署名鍵をBase64でエンコードした文字列"
-            echo "STORE_PASSWORD: キーストアのパスワード"
-            echo "KEY_ALIAS: 署名のエイリアス"
-            echo "KEY_PASSWORD: 署名のパスワード"
+          if [ "${{ secrets.STORE_FILE }}" == "" ]; then
+            echo -e "\nERROR!\nTo release, you need to set up a signing key! \n"
+            echo "STORE_FILE: A Base64 encoded string of the signing key in JKS format"
+            echo "STORE_PASSWORD: Key store password"
+            echo "KEY_ALIAS: Key alias"
+            echo "KEY_PASSWORD: Key password"
             echo ""
             exit 1
           fi
-          if [[ "${{ steps.check-tag.outputs.exists }}" == "true" ]]; then
-            echo -e "\nERROR!\n既に同じタグが存在します｡\n"
-            echo "build.gradle の versionName を変更してください"
+          if [ "${{ steps.check-tag.outputs.exists }}" == "true" ]; then
+            echo -e "\nERROR!\nThe same tag already exists!\n"
+            echo "Please change versionName in build.gradle"
             echo ""
             exit 1
           fi
 
       - name: Build with Gradle
         run: |
-          if [[ "${{ inputs.release }}" == "true" ]]; then
+          if [ "${{ inputs.release }}" == "true" ]; then
             echo "${{ secrets.STORE_FILE }}" | base64 -d > app/release.jks
             export STORE_PASSWORD="${{ secrets.STORE_PASSWORD }}"
             export KEY_ALIAS="${{ secrets.KEY_ALIAS }}"
             export KEY_PASSWORD="${{ secrets.KEY_PASSWORD }}"
-            ./gradlew aR
-            ./gradlew bR
+            ./gradlew aR bR
             cp -f app/build/outputs/apk/release/app-release.apk ${{ env.repo }}-${{ env.version }}.apk
             cp -f app/build/outputs/bundle/release/app-release.aab ${{ env.repo }}-${{ env.version }}.aab
           else
-            ./gradlew asD
-            ./gradlew bunD
+            ./gradlew asD bunD
             cp -f app/build/outputs/apk/debug/app-debug.apk ${{ env.repo }}-${{ env.version }}@${{ env.commit }}.apk
             cp -f app/build/outputs/bundle/debug/app-debug.aab ${{ env.repo }}-${{ env.version }}@${{ env.commit }}.aab
           fi