diff --git a/README.md b/README.md
index 2afdf74..b320a2d 100644
--- a/README.md
+++ b/README.md
@@ -17,6 +17,12 @@ You can check out [Documentation](https://mirzemehdi.github.io/KMPNotifier) for
 ## Installation
 Before starting you need to setup basic setup using Firebase official guideline (like initializing project in Firebase, adding `google-services.json` to android, `GoogleService-Info.plist` to iOS).
 
+## Minimum Requirements
+
+- **Android:** `minSdkVersion 21`
+- **iOS:** `iOS 14.1`
+
+
 ### Gradle Setup
 KMPNotifier is available on Maven Central. In your root project `build.gradle.kts` file (or `settings.gradle` file) add `mavenCentral()` to repositories, and  add `google-services` plugin to plugins.
 
diff --git a/gradle/libs.versions.toml b/gradle/libs.versions.toml
index bcc95d8..4685863 100644
--- a/gradle/libs.versions.toml
+++ b/gradle/libs.versions.toml
@@ -3,7 +3,7 @@ compose = "1.5.4"
 compose-plugin = "1.5.11"
 compose-compiler = "1.5.4"
 agp = "8.1.3"
-android-minSdk = "24"
+android-minSdk = "21"
 android-compileSdk = "34"
 android-targetSdk = "34"
 androidx-activityCompose = "1.8.0"
diff --git a/iosApp/iosApp.xcodeproj/project.pbxproj b/iosApp/iosApp.xcodeproj/project.pbxproj
index 2ff1300..00ed97f 100644
--- a/iosApp/iosApp.xcodeproj/project.pbxproj
+++ b/iosApp/iosApp.xcodeproj/project.pbxproj
@@ -337,7 +337,7 @@
 					"$(SRCROOT)/../sample/build/xcode-frameworks/$(CONFIGURATION)/$(SDK_NAME)",
 				);
 				INFOPLIST_FILE = iosApp/Info.plist;
-				IPHONEOS_DEPLOYMENT_TARGET = 16.0;
+				IPHONEOS_DEPLOYMENT_TARGET = 14.1;
 				LD_RUNPATH_SEARCH_PATHS = (
 					"$(inherited)",
 					"@executable_path/Frameworks",
@@ -368,7 +368,7 @@
 					"$(SRCROOT)/../sample/build/xcode-frameworks/$(CONFIGURATION)/$(SDK_NAME)",
 				);
 				INFOPLIST_FILE = iosApp/Info.plist;
-				IPHONEOS_DEPLOYMENT_TARGET = 16.0;
+				IPHONEOS_DEPLOYMENT_TARGET = 14.1;
 				LD_RUNPATH_SEARCH_PATHS = (
 					"$(inherited)",
 					"@executable_path/Frameworks",
diff --git a/kmpnotifier/build.gradle.kts b/kmpnotifier/build.gradle.kts
index f42a208..52f9275 100644
--- a/kmpnotifier/build.gradle.kts
+++ b/kmpnotifier/build.gradle.kts
@@ -23,7 +23,7 @@ kotlin {
 
 
     cocoapods {
-        ios.deploymentTarget = "11.0"
+        ios.deploymentTarget = "14.1"
         framework {
             baseName = "KMPNotifier"
             isStatic = true