diff --git a/dongne-account-api/src/main/kotlin/io/beaniejoy/dongnecafe/common/security/ApiAuthenticationFilter.kt b/dongne-account-api/src/main/kotlin/io/beaniejoy/dongnecafe/common/security/ApiAuthenticationFilter.kt
index 7a52e47..a44a00b 100644
--- a/dongne-account-api/src/main/kotlin/io/beaniejoy/dongnecafe/common/security/ApiAuthenticationFilter.kt
+++ b/dongne-account-api/src/main/kotlin/io/beaniejoy/dongnecafe/common/security/ApiAuthenticationFilter.kt
@@ -2,8 +2,8 @@ package io.beaniejoy.dongnecafe.common.security
 
 import com.fasterxml.jackson.module.kotlin.jacksonObjectMapper
 import io.beaniejoy.dongnecafe.domain.member.model.request.SignInRequest
-import mu.KotlinLogging
 import org.springframework.http.HttpMethod
+import org.springframework.http.MediaType
 import org.springframework.security.authentication.UsernamePasswordAuthenticationToken
 import org.springframework.security.core.Authentication
 import org.springframework.security.web.authentication.AbstractAuthenticationProcessingFilter
@@ -15,19 +15,14 @@ import javax.servlet.http.HttpServletResponse
 class ApiAuthenticationFilter(requestMatcher: AntPathRequestMatcher) :
     AbstractAuthenticationProcessingFilter(requestMatcher) {
 
-    private val log = KotlinLogging.logger {}
-
     private val objectMapper = jacksonObjectMapper()
 
     override fun attemptAuthentication(
         request: HttpServletRequest,
         response: HttpServletResponse,
     ): Authentication {
-        log.info { "[API Filter] attempt to authenticate" }
-        if (isPostMethod(request).not()) {
-            val errorMsg = "Authentication is not supported (only support for POST method)"
-            log.error { errorMsg }
-            throw IllegalStateException(errorMsg)
+        if (isValidRequest(request).not()) {
+            throw IllegalStateException("request is not supported. check request method and content-type")
         }
 
         val signInRequest = objectMapper.readValue(request.reader, SignInRequest::class.java)
@@ -35,23 +30,24 @@ class ApiAuthenticationFilter(requestMatcher: AntPathRequestMatcher) :
 
         val token = signInRequest.let {
             if (StringUtils.hasText(it.email).not() || StringUtils.hasText(it.password).not()) {
-                log.error { "Email(${it.email}) & Password are not empty" }
                 throw IllegalArgumentException("Email & Password are not empty!!")
             }
 
             UsernamePasswordAuthenticationToken(it.email, it.password)
         }
 
-        val authenticate = authenticationManager.authenticate(token)
-        logger.info("attempt authentication ${authenticate.principal}")
-        return authenticate
+        return authenticationManager.authenticate(token)
     }
 
-    private fun isPostMethod(request: HttpServletRequest): Boolean {
+    private fun isValidRequest(request: HttpServletRequest): Boolean {
         if (request.method != HttpMethod.POST.name) {
             return false
         }
 
+        if (request.contentType != MediaType.APPLICATION_JSON_VALUE) {
+            return false
+        }
+
         return true
     }
 }
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