diff --git a/demos/Android-Demos/PolarSDK-ECG-HR-Demo/app/build.gradle b/demos/Android-Demos/PolarSDK-ECG-HR-Demo/app/build.gradle
index f0b430fa..2ef2f557 100644
--- a/demos/Android-Demos/PolarSDK-ECG-HR-Demo/app/build.gradle
+++ b/demos/Android-Demos/PolarSDK-ECG-HR-Demo/app/build.gradle
@@ -37,9 +37,9 @@ dependencies {
     implementation 'com.androidplot:androidplot-core:1.5.7'
     implementation 'io.reactivex.rxjava3:rxjava:3.0.4'
     implementation 'io.reactivex.rxjava3:rxandroid:3.0.0'
-    implementation 'androidx.appcompat:appcompat:1.3.0'
+    implementation 'androidx.appcompat:appcompat:1.3.1'
     implementation "androidx.core:core-ktx:1.6.0"
-    implementation 'androidx.constraintlayout:constraintlayout:2.0.4'
+    implementation 'androidx.constraintlayout:constraintlayout:2.1.1'
     implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
     testImplementation 'junit:junit:4.13.2'
     androidTestImplementation 'androidx.test.ext:junit:1.1.3'
diff --git a/demos/Android-Demos/PolarSDK-ECG-HR-Demo/build.gradle b/demos/Android-Demos/PolarSDK-ECG-HR-Demo/build.gradle
index 2fb3fede..67c2cc05 100644
--- a/demos/Android-Demos/PolarSDK-ECG-HR-Demo/build.gradle
+++ b/demos/Android-Demos/PolarSDK-ECG-HR-Demo/build.gradle
@@ -1,5 +1,5 @@
 buildscript {
-    ext.kotlin_version = '1.5.20'
+    ext.kotlin_version = '1.5.31'
     repositories {
         mavenCentral()
         google()