diff --git a/android/src/main/kotlin/com/pravera/flutter_activity_recognition/service/ActivityRecognitionIntentService.kt b/android/src/main/kotlin/com/pravera/flutter_activity_recognition/service/ActivityRecognitionIntentService.kt
index 7f71733..076c2c6 100644
--- a/android/src/main/kotlin/com/pravera/flutter_activity_recognition/service/ActivityRecognitionIntentService.kt
+++ b/android/src/main/kotlin/com/pravera/flutter_activity_recognition/service/ActivityRecognitionIntentService.kt
@@ -22,7 +22,7 @@ class ActivityRecognitionIntentService: JobIntentService() {
 	override fun onHandleWork(intent: Intent) {
 		val extractedResult = ActivityRecognitionResult.extractResult(intent)
 		val probableActivities = extractedResult?.probableActivities
-		val mostProbableActivity = probableActivities?.maxBy { it.confidence } ?: return
+		val mostProbableActivity = probableActivities?.maxByOrNull { it.confidence } ?: return
 
 		val activityData = ActivityData(
 			ActivityRecognitionUtils.getActivityTypeFromValue(mostProbableActivity.type),
diff --git a/pubspec.lock b/pubspec.lock
index 4935c14..b482404 100644
--- a/pubspec.lock
+++ b/pubspec.lock
@@ -7,7 +7,7 @@ packages:
       name: async
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.8.1"
+    version: "2.8.2"
   boolean_selector:
     dependency: transitive
     description:
@@ -21,7 +21,7 @@ packages:
       name: characters
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.1.0"
+    version: "1.2.0"
   charcode:
     dependency: transitive
     description:
@@ -66,7 +66,14 @@ packages:
       name: matcher
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.12.10"
+    version: "0.12.11"
+  material_color_utilities:
+    dependency: transitive
+    description:
+      name: material_color_utilities
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "0.1.3"
   meta:
     dependency: transitive
     description:
@@ -127,7 +134,7 @@ packages:
       name: test_api
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.4.2"
+    version: "0.4.8"
   typed_data:
     dependency: transitive
     description:
@@ -141,7 +148,7 @@ packages:
       name: vector_math
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.1.0"
+    version: "2.1.1"
 sdks:
-  dart: ">=2.12.0 <3.0.0"
+  dart: ">=2.14.0 <3.0.0"
   flutter: ">=1.20.0"