diff --git a/step-08/src/main/java/dev/langchain4j/quarkus/workshop/PromptInjectionDetectionService.java b/step-08/src/main/java/dev/langchain4j/quarkus/workshop/PromptInjectionDetectionService.java
index ab2c16f..f432425 100644
--- a/step-08/src/main/java/dev/langchain4j/quarkus/workshop/PromptInjectionDetectionService.java
+++ b/step-08/src/main/java/dev/langchain4j/quarkus/workshop/PromptInjectionDetectionService.java
@@ -3,8 +3,10 @@
 import dev.langchain4j.service.SystemMessage;
 import dev.langchain4j.service.UserMessage;
 import io.quarkiverse.langchain4j.RegisterAiService;
+import jakarta.enterprise.context.ApplicationScoped;
 
 @RegisterAiService
+@ApplicationScoped
 public interface PromptInjectionDetectionService {
 
     @SystemMessage("""