diff --git a/build.gradle.kts b/build.gradle.kts
index 08780a4..cb2df04 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -20,7 +20,7 @@ tasks.test {
 }
 
 kotlin {
-    jvmToolchain(11)
+    jvmToolchain(17)
 }
 
 detekt {
diff --git a/src/main/kotlin/mate/academy/GreetingService.kt b/src/main/kotlin/mate/academy/GreetingService.kt
index de16bc8..bbfee8a 100644
--- a/src/main/kotlin/mate/academy/GreetingService.kt
+++ b/src/main/kotlin/mate/academy/GreetingService.kt
@@ -2,6 +2,14 @@ package mate.academy
 
 class GreetingService {
     fun getGreetings(clientNames: List<String?>): List<String> {
-        // TODO: implement it
+        val greetings = mutableListOf<String>()
+
+        clientNames.forEach { name ->
+            name?.let {
+                greetings.add("Hello, $it!")
+            }
+        }
+
+        return greetings
     }
 }