diff --git a/src/main/kotlin/com/cengenes/kotlin/api/controller/IndexController.java b/src/main/kotlin/com/cengenes/kotlin/api/controller/IndexController.java
deleted file mode 100644
index 99f609f..0000000
--- a/src/main/kotlin/com/cengenes/kotlin/api/controller/IndexController.java
+++ /dev/null
@@ -1,14 +0,0 @@
-package com.cengenes.kotlin.api.controller;
-
-import org.springframework.stereotype.Controller;
-import org.springframework.web.bind.annotation.GetMapping;
-
-@Controller
-public class IndexController {
-
-    @GetMapping("/")
-    public String redirectToSwaggerUi(){
-        return "redirect:/swagger-ui.html";
-    }
-
-}
diff --git a/src/main/kotlin/com/cengenes/kotlin/api/controller/IndexController.kt b/src/main/kotlin/com/cengenes/kotlin/api/controller/IndexController.kt
new file mode 100644
index 0000000..bc0d9e9
--- /dev/null
+++ b/src/main/kotlin/com/cengenes/kotlin/api/controller/IndexController.kt
@@ -0,0 +1,14 @@
+package com.cengenes.kotlin.api.controller
+
+import org.springframework.stereotype.Controller
+import org.springframework.web.bind.annotation.GetMapping
+
+@Controller
+class IndexController {
+
+    @GetMapping("/")
+    fun redirectToSwaggerUi(): String {
+        return "redirect:/swagger-ui.html"
+    }
+
+}
diff --git a/src/test/kotlin/com/cengenes/kotlin/api/controller/IndexControllerTest.java b/src/test/kotlin/com/cengenes/kotlin/api/controller/IndexControllerTest.java
deleted file mode 100644
index 827c593..0000000
--- a/src/test/kotlin/com/cengenes/kotlin/api/controller/IndexControllerTest.java
+++ /dev/null
@@ -1,32 +0,0 @@
-package com.cengenes.kotlin.api.controller;
-
-import org.junit.Test;
-import org.junit.runner.RunWith;
-import org.springframework.beans.factory.annotation.Autowired;
-import org.springframework.boot.test.autoconfigure.web.servlet.AutoConfigureMockMvc;
-import org.springframework.boot.test.context.SpringBootTest;
-import org.springframework.test.context.junit4.SpringRunner;
-import org.springframework.test.web.servlet.MockMvc;
-
-import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.get;
-import static org.springframework.test.web.servlet.result.MockMvcResultHandlers.print;
-import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.redirectedUrl;
-import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.status;
-
-@RunWith(SpringRunner.class)
-@SpringBootTest
-@AutoConfigureMockMvc
-public class IndexControllerTest {
-
-    @Autowired
-    private MockMvc mockMvc;
-
-    @Test
-    public void it_should_redirect_to_swagger_ui() throws Exception {
-        //when and then
-        mockMvc.perform(get("/"))
-            .andDo(print())
-            .andExpect(status().is3xxRedirection())
-            .andExpect(redirectedUrl("/swagger-ui.html"));
-    }
-}
\ No newline at end of file
diff --git a/src/test/kotlin/com/cengenes/kotlin/api/controller/IndexControllerTest.kt b/src/test/kotlin/com/cengenes/kotlin/api/controller/IndexControllerTest.kt
new file mode 100644
index 0000000..adcb7a4
--- /dev/null
+++ b/src/test/kotlin/com/cengenes/kotlin/api/controller/IndexControllerTest.kt
@@ -0,0 +1,33 @@
+package com.cengenes.kotlin.api.controller
+
+import org.junit.Test
+import org.junit.runner.RunWith
+import org.springframework.beans.factory.annotation.Autowired
+import org.springframework.boot.test.autoconfigure.web.servlet.AutoConfigureMockMvc
+import org.springframework.boot.test.context.SpringBootTest
+import org.springframework.test.context.junit4.SpringRunner
+import org.springframework.test.web.servlet.MockMvc
+
+import org.springframework.test.web.servlet.request.MockMvcRequestBuilders.get
+import org.springframework.test.web.servlet.result.MockMvcResultHandlers.print
+import org.springframework.test.web.servlet.result.MockMvcResultMatchers.redirectedUrl
+import org.springframework.test.web.servlet.result.MockMvcResultMatchers.status
+
+@RunWith(SpringRunner::class)
+@SpringBootTest
+@AutoConfigureMockMvc
+class IndexControllerTest {
+
+    @Autowired
+    private val mockMvc: MockMvc? = null
+
+    @Test
+    @Throws(Exception::class)
+    fun it_should_redirect_to_swagger_ui() {
+        //when and then
+        mockMvc!!.perform(get("/"))
+                .andDo(print())
+                .andExpect(status().is3xxRedirection)
+                .andExpect(redirectedUrl("/swagger-ui.html"))
+    }
+}
\ No newline at end of file