diff --git a/src/main/kotlin/roomescape/common/log/RoomescapeLogMaskingConverter.kt b/src/main/kotlin/roomescape/common/log/RoomescapeLogMaskingConverter.kt
index cb12be26..58e41174 100644
--- a/src/main/kotlin/roomescape/common/log/RoomescapeLogMaskingConverter.kt
+++ b/src/main/kotlin/roomescape/common/log/RoomescapeLogMaskingConverter.kt
@@ -7,20 +7,16 @@ import com.fasterxml.jackson.databind.ObjectMapper
 import com.fasterxml.jackson.databind.node.ArrayNode
 import com.fasterxml.jackson.databind.node.ObjectNode
 import com.fasterxml.jackson.databind.node.TextNode
-import io.github.oshai.kotlinlogging.KLogger
-import io.github.oshai.kotlinlogging.KotlinLogging
 import roomescape.common.config.JacksonConfig
 
+private const val MASK: String = "****"
 private val SENSITIVE_KEYS = setOf("password", "accessToken")
-private val log: KLogger = KotlinLogging.logger {}
 
 class RoomescapeLogMaskingConverter(
     private val objectMapper: ObjectMapper = JacksonConfig().objectMapper()
 ) : MessageConverter() {
-
     override fun convert(event: ILoggingEvent): String {
         val message: String = event.formattedMessage
-        log.warn { "[RoomescapeLogMaskingConverter.convert] formattedMessage: $message" }
 
         return if (isJsonString(message)) {
             maskedJsonString(message)
@@ -47,7 +43,7 @@ class RoomescapeLogMaskingConverter(
             val key = matchResult.groupValues[1]
             val delimiter = matchResult.groupValues[2]
 
-            "${key}${delimiter}****"
+            "${key}${delimiter}${MASK}"
         }
     }
 
@@ -55,7 +51,7 @@ class RoomescapeLogMaskingConverter(
         node?.forEachEntry { key, childNode ->
             when {
                 childNode.isValueNode -> {
-                    if (key in SENSITIVE_KEYS) (node as ObjectNode).put(key, "****")
+                    if (key in SENSITIVE_KEYS) (node as ObjectNode).put(key, MASK)
                 }
 
                 childNode.isObject -> maskRecursive(childNode)