diff --git a/CHANGELOG.md b/CHANGELOG.md
index 4654def..237072d 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,9 @@
 # Changelog
 All changes to this project will be documented in this file.
 
+## [1.5.2] - 2023-09-26
+- Extend Android minSdkVersion to 21
+
 ## [1.5.1] - 2023-08-22
 - Fix cancellation of upload workers for the WorkManager API
 
diff --git a/README.md b/README.md
index ec1147f..68b83bd 100644
--- a/README.md
+++ b/README.md
@@ -57,7 +57,7 @@ Add this dependency to your project's POM:
 <dependency>
   <groupId>video.api</groupId>
   <artifactId>android-api-client</artifactId>
-  <version>1.5.1</version>
+  <version>1.5.2</version>
   <scope>compile</scope>
 </dependency>
 ```
@@ -67,7 +67,7 @@ Add this dependency to your project's POM:
 Add this dependency to your project's build file:
 
 ```groovy
-implementation "video.api:android-api-client:1.5.1"
+implementation "video.api:android-api-client:1.5.2"
 ```
 
 ### Others
@@ -80,7 +80,7 @@ mvn clean package
 
 Then manually install the following JARs:
 
-* `target/android-api-client-1.5.1.jar`
+* `target/android-api-client-1.5.2.jar`
 * `target/lib/*.jar`
 
 ## Code sample
diff --git a/build.gradle b/build.gradle
index 4d857c4..93966c7 100644
--- a/build.gradle
+++ b/build.gradle
@@ -5,7 +5,7 @@ apply plugin: 'maven-publish'
 apply plugin: 'kotlin-android'
 
 group = 'video.api'
-version = '1.5.1'
+version = '1.5.2'
 
 buildscript {
     repositories {
@@ -36,7 +36,7 @@ if(hasProperty('target') && target == 'android') {
         compileSdkVersion 33
         buildToolsVersion '30.0.3'
         defaultConfig {
-            minSdkVersion 24
+            minSdkVersion 21
             targetSdkVersion 33
             multiDexEnabled true
 
diff --git a/examples/service/build.gradle b/examples/service/build.gradle
index 70d8d42..d69ab5e 100644
--- a/examples/service/build.gradle
+++ b/examples/service/build.gradle
@@ -8,7 +8,7 @@ android {
 
     defaultConfig {
         applicationId "video.api.client.service.example"
-        minSdkVersion 24
+        minSdkVersion 21
         targetSdkVersion 33
         versionCode 1
         versionName "1.0"
diff --git a/examples/service/src/main/java/video/api/client/service/example/ReadStorePermissionManager.kt b/examples/service/src/main/java/video/api/client/service/example/ReadStorePermissionManager.kt
index 91adf16..680eb8d 100644
--- a/examples/service/src/main/java/video/api/client/service/example/ReadStorePermissionManager.kt
+++ b/examples/service/src/main/java/video/api/client/service/example/ReadStorePermissionManager.kt
@@ -16,13 +16,21 @@ class ReadStorePermissionManager(
     } else {
         android.Manifest.permission.READ_EXTERNAL_STORAGE
     }
+
     private val hasPermission: Boolean
-        get() = activity.checkSelfPermission(requiredPermission) == PackageManager.PERMISSION_GRANTED
+        get() = if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
+            activity.checkSelfPermission(requiredPermission) == PackageManager.PERMISSION_GRANTED
+        } else {
+            true
+        }
 
     fun requestPermission() {
         if (hasPermission) {
             onGranted()
         } else {
+            if (Build.VERSION.SDK_INT < Build.VERSION_CODES.M) {
+                throw IllegalStateException("Permission should be granted")
+            }
             if (activity.shouldShowRequestPermissionRationale(requiredPermission)) {
                 onShowPermissionRationale(requiredPermission) {
                     requestPermission.launch(requiredPermission)
@@ -41,4 +49,4 @@ class ReadStorePermissionManager(
                 onDenied()
             }
         }
-}
\ No newline at end of file
+}
diff --git a/examples/workmanager/build.gradle b/examples/workmanager/build.gradle
index 7f976da..cc355f8 100644
--- a/examples/workmanager/build.gradle
+++ b/examples/workmanager/build.gradle
@@ -8,7 +8,7 @@ android {
 
     defaultConfig {
         applicationId "video.api.client.work.example"
-        minSdkVersion 24
+        minSdkVersion 21
         targetSdkVersion 33
         versionCode 1
         versionName "1.0"
diff --git a/examples/workmanager/src/main/java/video/api/client/work/example/ReadStorePermissionManager.kt b/examples/workmanager/src/main/java/video/api/client/work/example/ReadStorePermissionManager.kt
index b1430d5..92bae48 100644
--- a/examples/workmanager/src/main/java/video/api/client/work/example/ReadStorePermissionManager.kt
+++ b/examples/workmanager/src/main/java/video/api/client/work/example/ReadStorePermissionManager.kt
@@ -16,13 +16,21 @@ class ReadStorePermissionManager(
     } else {
         android.Manifest.permission.READ_EXTERNAL_STORAGE
     }
+
     private val hasPermission: Boolean
-        get() = activity.checkSelfPermission(requiredPermission) == PackageManager.PERMISSION_GRANTED
+        get() = if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
+            activity.checkSelfPermission(requiredPermission) == PackageManager.PERMISSION_GRANTED
+        } else {
+            true
+        }
 
     fun requestPermission() {
         if (hasPermission) {
             onGranted()
         } else {
+            if (Build.VERSION.SDK_INT < Build.VERSION_CODES.M) {
+                throw IllegalStateException("Permission should be granted")
+            }
             if (activity.shouldShowRequestPermissionRationale(requiredPermission)) {
                 onShowPermissionRationale(requiredPermission) {
                     requestPermission.launch(requiredPermission)
@@ -41,4 +49,4 @@ class ReadStorePermissionManager(
                 onDenied()
             }
         }
-}
\ No newline at end of file
+}
diff --git a/maven-push.gradle b/maven-push.gradle
index 14e4a15..f11bc08 100644
--- a/maven-push.gradle
+++ b/maven-push.gradle
@@ -18,7 +18,7 @@ apply plugin: 'maven-publish'
 apply plugin: 'signing'
 
 def isReleaseBuild() {
-    return !"1.5.1".contains("SNAPSHOT")
+    return !"1.5.2".contains("SNAPSHOT")
 }
 
 def getReleaseRepositoryUrl() {
@@ -47,7 +47,7 @@ afterEvaluate { project ->
 
                 groupId = "video.api"
                 artifactId = "android-api-client"
-                version = "1.5.1"
+                version = "1.5.2"
 
                 pom {
                     name = "video.api:android-api-client"
diff --git a/pom.xml b/pom.xml
index c54724c..b3f6c17 100644
--- a/pom.xml
+++ b/pom.xml
@@ -5,7 +5,7 @@
     <artifactId>android-api-client</artifactId>
     <packaging>jar</packaging>
     <name>${project.groupId}:${project.artifactId}</name>
-    <version>1.5.1</version>
+    <version>1.5.2</version>
     <url>https://github.com/apivideo/api.video-android-client</url>
     <description>api.video Android API client</description>
     <scm>
diff --git a/src/main/java/video/api/client/api/ApiClient.java b/src/main/java/video/api/client/api/ApiClient.java
index b58b932..7d6483d 100644
--- a/src/main/java/video/api/client/api/ApiClient.java
+++ b/src/main/java/video/api/client/api/ApiClient.java
@@ -118,7 +118,7 @@ private OkHttpClient initHttpClient(List<Interceptor> interceptors) {
     private void init() {
         verifyingSsl = true;
         json = new JSON();
-        addDefaultHeader("AV-Origin-Client", "android:1.5.1");
+        addDefaultHeader("AV-Origin-Client", "android:1.5.2");
     }
 
     private boolean isValid(String regex, String field) {
diff --git a/src/main/java/video/api/client/api/notifications/NotificationExtensions.kt b/src/main/java/video/api/client/api/notifications/NotificationExtensions.kt
index 53332ab..b2c0cde 100644
--- a/src/main/java/video/api/client/api/notifications/NotificationExtensions.kt
+++ b/src/main/java/video/api/client/api/notifications/NotificationExtensions.kt
@@ -4,6 +4,7 @@ import android.content.Context
 import androidx.annotation.ColorRes
 import androidx.annotation.DrawableRes
 import androidx.core.app.NotificationCompat
+import androidx.core.content.ContextCompat
 
 fun NotificationCompat.Builder.setStyle(
     context: Context,
@@ -11,5 +12,5 @@ fun NotificationCompat.Builder.setStyle(
     @ColorRes notificationColorResourceId: Int
 ): NotificationCompat.Builder = apply {
     setSmallIcon(notificationIconResourceId)
-    color = context.getColor(notificationColorResourceId)
+    color = ContextCompat.getColor(context, notificationColorResourceId)
 }
\ No newline at end of file