diff --git a/.github/workflows/android.yml b/.github/workflows/android.yml
index 9c60fef..fad3cc5 100644
--- a/.github/workflows/android.yml
+++ b/.github/workflows/android.yml
@@ -17,10 +17,10 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
-      - name: set up JDK 17
+      - name: set up JDK 21
         uses: actions/setup-java@v4
         with:
-          java-version: '17'
+          java-version: '21'
           distribution: 'temurin'
           cache: gradle
       - name: Grant execute permission for gradlew
@@ -32,10 +32,10 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
-      - name: set up JDK 17
+      - name: set up JDK 21
         uses: actions/setup-java@v4
         with:
-          java-version: '17'
+          java-version: '21'
           distribution: 'temurin'
           cache: gradle
       - name: Grant execute permission for gradlew
diff --git a/app/build.gradle b/app/build.gradle
index 4981cac..a469a11 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -36,11 +36,11 @@ android {
         }
     }
     compileOptions {
-        sourceCompatibility JavaVersion.VERSION_17
-        targetCompatibility JavaVersion.VERSION_17
+        sourceCompatibility JavaVersion.VERSION_21
+        targetCompatibility JavaVersion.VERSION_21
     }
     kotlinOptions {
-        jvmTarget = '17'
+        jvmTarget = '21'
     }
     buildFeatures {
         compose true
diff --git a/data/repository/build.gradle b/data/repository/build.gradle
index 27adaa2..a92d2fa 100644
--- a/data/repository/build.gradle
+++ b/data/repository/build.gradle
@@ -21,11 +21,11 @@ android {
         }
     }
     compileOptions {
-        sourceCompatibility JavaVersion.VERSION_17
-        targetCompatibility JavaVersion.VERSION_17
+        sourceCompatibility JavaVersion.VERSION_21
+        targetCompatibility JavaVersion.VERSION_21
     }
     kotlinOptions {
-        jvmTarget = '17'
+        jvmTarget = '21'
     }
     namespace 'com.nagopy.android.debugassistant.data.repository'
 }
diff --git a/domain/model/build.gradle b/domain/model/build.gradle
index 59eb610..27fd5c9 100644
--- a/domain/model/build.gradle
+++ b/domain/model/build.gradle
@@ -4,8 +4,8 @@ plugins {
 }
 
 java {
-    sourceCompatibility = JavaVersion.VERSION_17
-    targetCompatibility = JavaVersion.VERSION_17
+    sourceCompatibility = JavaVersion.VERSION_21
+    targetCompatibility = JavaVersion.VERSION_21
 }
 
 dependencies {
diff --git a/domain/usecase/build.gradle b/domain/usecase/build.gradle
index 484e7bf..d6271db 100644
--- a/domain/usecase/build.gradle
+++ b/domain/usecase/build.gradle
@@ -21,11 +21,11 @@ android {
         }
     }
     compileOptions {
-        sourceCompatibility JavaVersion.VERSION_17
-        targetCompatibility JavaVersion.VERSION_17
+        sourceCompatibility JavaVersion.VERSION_21
+        targetCompatibility JavaVersion.VERSION_21
     }
     kotlinOptions {
-        jvmTarget = '17'
+        jvmTarget = '21'
     }
     namespace 'com.nagopy.android.debugassistant.domain.usecase'
 }