diff --git a/basemob/build.gradle.kts b/basemob/build.gradle.kts
index 2875281..5268fc2 100644
--- a/basemob/build.gradle.kts
+++ b/basemob/build.gradle.kts
@@ -17,7 +17,11 @@ plugins {
 @Suppress("UnstableApiUsage")
 android {
     namespace = "com.github.submob.basemob"
-    compileSdk = ProjectSettings.COMPILE_SDK_VERSION
+
+    ProjectSettings.apply {
+        compileSdk = COMPILE_SDK_VERSION
+        defaultConfig.minSdk = MIN_SDK_VERSION
+    }
 
     buildFeatures {
         viewBinding = true
diff --git a/buildSrc/src/main/kotlin/ProjectSettings.kt b/buildSrc/src/main/kotlin/ProjectSettings.kt
index ea3d426..43e93c8 100644
--- a/buildSrc/src/main/kotlin/ProjectSettings.kt
+++ b/buildSrc/src/main/kotlin/ProjectSettings.kt
@@ -6,7 +6,7 @@ import java.io.ByteArrayOutputStream
 
 object ProjectSettings {
     const val COMPILE_SDK_VERSION = 31
-    const val MIN_SDK_VERSION = 21
+    const val MIN_SDK_VERSION = 14
     const val TARGET_SDK_VERSION = 31
 
     private const val MAYOR_VERSION = 2