diff --git a/src/main/kotlin/kr/co/vividnext/sodalive/content/AudioContentController.kt b/src/main/kotlin/kr/co/vividnext/sodalive/content/AudioContentController.kt
index 8537755..198c3d2 100644
--- a/src/main/kotlin/kr/co/vividnext/sodalive/content/AudioContentController.kt
+++ b/src/main/kotlin/kr/co/vividnext/sodalive/content/AudioContentController.kt
@@ -154,7 +154,7 @@ class AudioContentController(private val service: AudioContentService) {
 
     @GetMapping("/ranking")
     fun getAudioContentRanking(
-        @RequestParam("sort-type", required = false) sortType: String = "매출",
+        @RequestParam("sort-type", required = false) sortType: String? = "매출",
         @AuthenticationPrincipal(expression = "#this == 'anonymousUser' ? null : member") member: Member?,
         pageable: Pageable
     ) = run {
@@ -177,7 +177,7 @@ class AudioContentController(private val service: AudioContentService) {
                 endDate = endDate,
                 offset = pageable.offset,
                 limit = pageable.pageSize.toLong(),
-                sortType = sortType
+                sortType = sortType ?: "매출"
             )
         )
     }