diff --git a/cmd/korap-mcp/main.go b/cmd/korap-mcp/main.go
index 2b67475..d908f10 100644
--- a/cmd/korap-mcp/main.go
+++ b/cmd/korap-mcp/main.go
@@ -37,10 +37,10 @@
 	err = server.AddTool(
 		"ping",
 		"Simple ping tool to test server connectivity",
-		map[string]interface{}{
+		map[string]any{
 			"type": "object",
-			"properties": map[string]interface{}{
-				"message": map[string]interface{}{
+			"properties": map[string]any{
+				"message": map[string]any{
 					"type":        "string",
 					"description": "Message to echo back",
 				},
diff --git a/cmd/korap-mcp/main_test.go b/cmd/korap-mcp/main_test.go
index b447a5b..4c45170 100644
--- a/cmd/korap-mcp/main_test.go
+++ b/cmd/korap-mcp/main_test.go
@@ -258,8 +258,8 @@
 	tests := []struct {
 		name     string
 		field    string
-		expected interface{}
-		actual   interface{}
+		expected any
+		actual   any
 	}{
 		{
 			name:     "korap base URL",