diff --git a/.vscode/launch.json b/.vscode/launch.json
index 60a79b1..0044f2d 100644
--- a/.vscode/launch.json
+++ b/.vscode/launch.json
@@ -86,6 +86,16 @@
             "projectName": "rag-langchain4j-AllMiniLmL6V2-llm",
             "args": "",
             "envFile": "${workspaceFolder}/.env"
+        },
+        {
+            "type": "java",
+            "name": "Spring Boot-LlmRagWithSpringAiApplication<rag-springai-ollama-llm>",
+            "request": "launch",
+            "cwd": "${workspaceFolder}",
+            "mainClass": "com.learning.ai.llmragwithspringai.LlmRagWithSpringAiApplication",
+            "projectName": "rag-springai-ollama-llm",
+            "args": "",
+            "envFile": "${workspaceFolder}/.env"
         }
     ]
 }
\ No newline at end of file
diff --git a/java-openai/src/main/java/com/example/learning/Main.java b/java-openai/src/main/java/com/example/learning/Main.java
index f25ae09..50ab1b2 100644
--- a/java-openai/src/main/java/com/example/learning/Main.java
+++ b/java-openai/src/main/java/com/example/learning/Main.java
@@ -43,6 +43,6 @@ public static void main(String[] args) throws IOException, InterruptedException
 
         String body = response.body();
         ChatResponse chatResponse = mapper.readValue(body, ChatResponse.class);
-        System.out.println(chatResponse.choices().get(0).message().content());
+        System.out.println(chatResponse.choices().getFirst().message().content());
     }
 }
\ No newline at end of file
diff --git a/rag/rag-springai-ollama-llm/docker/docker-compose.yml b/rag/rag-springai-ollama-llm/docker/docker-compose.yml
index 6fc0083..687c199 100644
--- a/rag/rag-springai-ollama-llm/docker/docker-compose.yml
+++ b/rag/rag-springai-ollama-llm/docker/docker-compose.yml
@@ -1,4 +1,3 @@
-version: '3.7'
 services:
     ollama:
         image: langchain4j/ollama-llama3:latest
diff --git a/rag/rag-springai-ollama-llm/src/main/java/com/learning/ai/llmragwithspringai/LlmRagWithSpringAiApplication.java b/rag/rag-springai-ollama-llm/src/main/java/com/learning/ai/llmragwithspringai/LlmRagWithSpringAiApplication.java
index 076804c..cb1894d 100644
--- a/rag/rag-springai-ollama-llm/src/main/java/com/learning/ai/llmragwithspringai/LlmRagWithSpringAiApplication.java
+++ b/rag/rag-springai-ollama-llm/src/main/java/com/learning/ai/llmragwithspringai/LlmRagWithSpringAiApplication.java
@@ -4,7 +4,7 @@
 import org.springframework.boot.autoconfigure.SpringBootApplication;
 
 @SpringBootApplication
-public class LlmRagWithSpringAiApplication {
+class LlmRagWithSpringAiApplication {
 
     public static void main(String[] args) {
         SpringApplication.run(LlmRagWithSpringAiApplication.class, args);
diff --git a/rag/rag-springai-ollama-llm/src/main/java/com/learning/ai/llmragwithspringai/controller/AiController.java b/rag/rag-springai-ollama-llm/src/main/java/com/learning/ai/llmragwithspringai/controller/AiController.java
index 66887bc..78c78f3 100644
--- a/rag/rag-springai-ollama-llm/src/main/java/com/learning/ai/llmragwithspringai/controller/AiController.java
+++ b/rag/rag-springai-ollama-llm/src/main/java/com/learning/ai/llmragwithspringai/controller/AiController.java
@@ -15,7 +15,7 @@
 @RestController
 @RequestMapping("/api/ai")
 @Validated
-public class AiController {
+class AiController {
 
     private static final Logger LOGGER = LoggerFactory.getLogger(AiController.class);
 
diff --git a/rag/rag-springai-ollama-llm/src/main/java/com/learning/ai/llmragwithspringai/controller/DataIndexController.java b/rag/rag-springai-ollama-llm/src/main/java/com/learning/ai/llmragwithspringai/controller/DataIndexController.java
index e24099e..1584773 100644
--- a/rag/rag-springai-ollama-llm/src/main/java/com/learning/ai/llmragwithspringai/controller/DataIndexController.java
+++ b/rag/rag-springai-ollama-llm/src/main/java/com/learning/ai/llmragwithspringai/controller/DataIndexController.java
@@ -10,7 +10,7 @@
 
 @RestController
 @RequestMapping("/api/data/v1/")
-public class DataIndexController {
+class DataIndexController {
 
     private final DataIndexerService dataIndexerService;
 
@@ -19,7 +19,7 @@ public DataIndexController(DataIndexerService dataIndexerService) {
     }
 
     @PostMapping(value = "/upload", consumes = MediaType.MULTIPART_FORM_DATA_VALUE)
-    public ResponseEntity<String> load(@RequestPart("file") MultipartFile multipartFile) {
+    ResponseEntity<String> load(@RequestPart("file") MultipartFile multipartFile) {
         try {
             this.dataIndexerService.loadData(multipartFile.getResource());
             return ResponseEntity.ok("Data indexed successfully!");
@@ -30,7 +30,7 @@ public ResponseEntity<String> load(@RequestPart("file") MultipartFile multipartF
     }
 
     @GetMapping("count")
-    public Map<String, Long> count() {
+    Map<String, Long> count() {
         return Map.of("count", dataIndexerService.count());
     }
 }