payjp · koutaku921 · Jun 5, 2026 · Jun 3, 2026 · Jun 3, 2026 · Jun 3, 2026
diff --git a/README.md b/README.md
@@ -23,8 +23,8 @@ Androidでの利用 | PAY.JP https://pay.jp/docs/mobileapp-android
 
 ## 動作環境
 
-- Android Studio 3.0以上
-- Android OS 4.1 (API Level 16) 以上
+- Android Studio Ladybug Feature Drop (2024.2.2) 以上
+- Android OS 5.0 (API Level 21) 以上
 
 ## インストール
 

diff --git a/build.gradle b/build.gradle
@@ -59,7 +59,7 @@ tasks.named("dokkaHtmlCollector") {
 }
 
 ext {
-    minSdkVersion = 16
+    minSdkVersion = 21
     sdkVersion = 35
     numberOfCommits = numberOfCommits()
 }

diff --git a/gradle/libs.versions.toml b/gradle/libs.versions.toml
@@ -9,7 +9,7 @@ junitKtx = "1.1.5"
 kotlin = "2.0.0"
 browser = "1.6.0"
 leakcanaryAndroid = "2.14"
-okHttp3 = "3.12.13"
+okHttp3 = "4.12.0"
 moshi = "1.15.1"
 retrofit = "2.11.0"
 lifecycle = "2.6.2"
@@ -23,7 +23,7 @@ recyclerview = "1.3.2"
 cardio = "5.5.1"
 androidxCore = "1.12.0"
 annotation = "1.8.1"
-robolectric = "4.12.2"
+robolectric = "4.14"
 swiperefreshlayout = "1.1.0"
 viewpager2 = "1.0.0"
 webkit = "1.8.0"

diff --git a/payjp-android-cardform/src/test/resources/robolectric.properties b/payjp-android-cardform/src/test/resources/robolectric.properties
@@ -21,5 +21,5 @@
 # SOFTWARE.
 #
 
-sdk=19,34
+sdk=21,35
 constants=jp.pay.android.BuildConfig
diff --git a/payjp-android-core/src/main/kotlin/jp/pay/android/network/OkHttpTlsHelper.kt b/payjp-android-core/src/main/kotlin/jp/pay/android/network/OkHttpTlsHelper.kt
diff --git a/payjp-android-core/src/main/kotlin/jp/pay/android/network/Tls12SocketFactory.java b/payjp-android-core/src/main/kotlin/jp/pay/android/network/Tls12SocketFactory.java
diff --git a/payjp-android-core/src/main/kotlin/jp/pay/android/network/TokenApiClientFactory.kt b/payjp-android-core/src/main/kotlin/jp/pay/android/network/TokenApiClientFactory.kt
@@ -24,7 +24,6 @@ package jp.pay.android.network
 
 import com.squareup.moshi.Moshi
 import jp.pay.android.PayjpApi
-import jp.pay.android.PayjpLogger
 import jp.pay.android.model.BundleJsonAdapter
 import jp.pay.android.model.CardBrand
 import jp.pay.android.model.ClientInfo
@@ -73,9 +72,6 @@ internal object TokenApiClientFactory {
                     )
                 }
             }
-            .let {
-                OkHttpTlsHelper.enableTls12OnPreLollipop(it, PayjpLogger.get(debuggable))
-            }
             .dispatcher(Dispatcher(NetworkExecutorFactory.create()))
             .build()
 

diff --git a/payjp-android-core/src/test/resources/robolectric.properties b/payjp-android-core/src/test/resources/robolectric.properties
@@ -21,5 +21,5 @@
 # SOFTWARE.
 #
 
-sdk=19,34
+sdk=21,35
 constants=jp.pay.android.BuildConfig
diff --git a/payjp-android-coroutine/src/test/resources/robolectric.properties b/payjp-android-coroutine/src/test/resources/robolectric.properties
@@ -21,4 +21,4 @@
 # SOFTWARE.
 #
 
-sdk=19,34
+sdk=21,35
diff --git a/payjp-android-verifier/src/main/kotlin/jp/pay/android/verifier/ui/VerifierWebView.kt b/payjp-android-verifier/src/main/kotlin/jp/pay/android/verifier/ui/VerifierWebView.kt
@@ -160,9 +160,6 @@ internal class VerifierWebView @JvmOverloads constructor(
             domStorageEnabled = true
             @SuppressLint("SetJavaScriptEnabled")
             javaScriptEnabled = true
-            if (Build.VERSION.SDK_INT < Build.VERSION_CODES.JELLY_BEAN_MR2) {
-                savePassword = false
-            }
         }
         if (WebViewFeature.isFeatureSupported(WebViewFeature.SAFE_BROWSING_ENABLE)) {
             WebSettingsCompat.setSafeBrowsingEnabled(settings, true)

diff --git a/payjp-android-verifier/src/test/resources/robolectric.properties b/payjp-android-verifier/src/test/resources/robolectric.properties
@@ -21,4 +21,4 @@
 # SOFTWARE.
 #
 
-sdk=19,34
+sdk=21,35