diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index d512f26..9e291c7 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -19,10 +19,10 @@ jobs:
           
     - uses: actions/checkout@v3
     
-    - name: set up JDK 11
+    - name: set up JDK 17
       uses: actions/setup-java@v3
       with:
-        java-version: '11'
+        java-version: '17'
         distribution: 'temurin'
 
     - name: Create local.properties
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 9b63314..6da1b83 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -13,10 +13,10 @@ jobs:
     steps:
     - uses: actions/checkout@v3
     
-    - name: set up JDK 11
+    - name: set up JDK 17
       uses: actions/setup-java@v3
       with:
-        java-version: '11'
+        java-version: '17'
         distribution: 'temurin'
         cache: gradle
         
diff --git a/.idea/appInsightsSettings.xml b/.idea/appInsightsSettings.xml
new file mode 100644
index 0000000..371f2e2
--- /dev/null
+++ b/.idea/appInsightsSettings.xml
@@ -0,0 +1,26 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="AppInsightsSettings">
+    <option name="tabSettings">
+      <map>
+        <entry key="Firebase Crashlytics">
+          <value>
+            <InsightsFilterSettings>
+              <option name="connection">
+                <ConnectionSetting>
+                  <option name="appId" value="PLACEHOLDER" />
+                  <option name="mobileSdkAppId" value="" />
+                  <option name="projectId" value="" />
+                  <option name="projectNumber" value="" />
+                </ConnectionSetting>
+              </option>
+              <option name="signal" value="SIGNAL_UNSPECIFIED" />
+              <option name="timeIntervalDays" value="THIRTY_DAYS" />
+              <option name="visibilityType" value="ALL" />
+            </InsightsFilterSettings>
+          </value>
+        </entry>
+      </map>
+    </option>
+  </component>
+</project>
\ No newline at end of file
diff --git a/.idea/deploymentTargetSelector.xml b/.idea/deploymentTargetSelector.xml
new file mode 100644
index 0000000..b268ef3
--- /dev/null
+++ b/.idea/deploymentTargetSelector.xml
@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="deploymentTargetSelector">
+    <selectionStates>
+      <SelectionState runConfigName="app">
+        <option name="selectionMode" value="DROPDOWN" />
+      </SelectionState>
+    </selectionStates>
+  </component>
+</project>
\ No newline at end of file
diff --git a/.idea/gradle.xml b/.idea/gradle.xml
index 9f47dfb..639c779 100644
--- a/.idea/gradle.xml
+++ b/.idea/gradle.xml
@@ -4,16 +4,15 @@
   <component name="GradleSettings">
     <option name="linkedExternalProjectsSettings">
       <GradleProjectSettings>
-        <option name="testRunner" value="GRADLE" />
+        <option name="testRunner" value="CHOOSE_PER_TEST" />
         <option name="externalProjectPath" value="$PROJECT_DIR$" />
-        <option name="gradleJvm" value="jbr-17" />
+        <option name="gradleJvm" value="#GRADLE_LOCAL_JAVA_HOME" />
         <option name="modules">
           <set>
             <option value="$PROJECT_DIR$" />
             <option value="$PROJECT_DIR$/app" />
           </set>
         </option>
-        <option name="resolveExternalAnnotations" value="false" />
       </GradleProjectSettings>
     </option>
   </component>
diff --git a/.idea/migrations.xml b/.idea/migrations.xml
new file mode 100644
index 0000000..f8051a6
--- /dev/null
+++ b/.idea/migrations.xml
@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectMigrations">
+    <option name="MigrateToGradleLocalJavaHome">
+      <set>
+        <option value="$PROJECT_DIR$" />
+      </set>
+    </option>
+  </component>
+</project>
\ No newline at end of file
diff --git a/.idea/runConfigurations.xml b/.idea/runConfigurations.xml
new file mode 100644
index 0000000..16660f1
--- /dev/null
+++ b/.idea/runConfigurations.xml
@@ -0,0 +1,17 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="RunConfigurationProducerService">
+    <option name="ignoredProducers">
+      <set>
+        <option value="com.intellij.execution.junit.AbstractAllInDirectoryConfigurationProducer" />
+        <option value="com.intellij.execution.junit.AllInPackageConfigurationProducer" />
+        <option value="com.intellij.execution.junit.PatternConfigurationProducer" />
+        <option value="com.intellij.execution.junit.TestInClassConfigurationProducer" />
+        <option value="com.intellij.execution.junit.UniqueIdConfigurationProducer" />
+        <option value="com.intellij.execution.junit.testDiscovery.JUnitTestDiscoveryConfigurationProducer" />
+        <option value="org.jetbrains.kotlin.idea.junit.KotlinJUnitRunConfigurationProducer" />
+        <option value="org.jetbrains.kotlin.idea.junit.KotlinPatternConfigurationProducer" />
+      </set>
+    </option>
+  </component>
+</project>
\ No newline at end of file
diff --git a/README.md b/README.md
index d60e118..51f4dfa 100644
--- a/README.md
+++ b/README.md
@@ -1,10 +1,13 @@
-# Overview
+# overview
 
 Kotlin未経験で、Android Javaでアプリ開発したい人向けのテンプレートプロジェクト<br>
 productFlavorsでテンプレートを切り替える仕組みにしています。<br>
 使い方など、詳しいことは以下のWikiにまとめています。<br>
 https://github.com/LeoAndo/AndroidBasicApp/wiki<br>
 
+# develop environment
+Android Studio Meerkat
+
 # capture: Light Theme
 
 ## pixel3a API 30
diff --git a/app/build.gradle b/app/build.gradle
index 49f0c9b..dd6b9d8 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -60,6 +60,7 @@ android {
 
     buildFeatures {
         viewBinding true
+        buildConfig true
     }
 
     flavorDimensions += "version"
diff --git a/app/src/main/java/com/template/androidbasicapp/ui/fragment/UiDemoFragment.java b/app/src/main/java/com/template/androidbasicapp/ui/fragment/UiDemoFragment.java
index cc1788a..bd1816a 100644
--- a/app/src/main/java/com/template/androidbasicapp/ui/fragment/UiDemoFragment.java
+++ b/app/src/main/java/com/template/androidbasicapp/ui/fragment/UiDemoFragment.java
@@ -15,7 +15,6 @@
 import android.widget.ArrayAdapter;
 
 import com.google.android.material.snackbar.Snackbar;
-import com.template.androidbasicapp.AppLogger;
 import com.template.androidbasicapp.BuildConfig;
 import com.template.androidbasicapp.R;
 import com.template.androidbasicapp.data.Item;
@@ -28,7 +27,6 @@
 
 import java.util.ArrayList;
 import java.util.Arrays;
-import java.util.Collections;
 import java.util.List;
 import java.util.Optional;
 import java.util.stream.Collectors;
diff --git a/build.gradle b/build.gradle
index 0e07323..465593e 100644
--- a/build.gradle
+++ b/build.gradle
@@ -6,7 +6,7 @@ buildscript {
     }
 }
 plugins {
-    id 'com.android.application' version '7.4.2' apply false
-    id 'com.android.library' version '7.4.2' apply false
+    id 'com.android.application' version '8.7.3' apply false
+    id 'com.android.library' version '8.7.3' apply false
     id 'com.google.android.libraries.mapsplatform.secrets-gradle-plugin' version '2.0.1' apply false
 }
\ No newline at end of file
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
index 1251b7b..b2f6d22 100644
--- a/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -1,6 +1,6 @@
 #Thu Oct 19 18:40:28 JST 2023
 distributionBase=GRADLE_USER_HOME
-distributionUrl=https\://services.gradle.org/distributions/gradle-7.5-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.11.1-bin.zip
 distributionPath=wrapper/dists
 zipStorePath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME