diff --git a/gradle.properties b/gradle.properties
index 0d6380d..9632f22 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -18,7 +18,7 @@ kotlin.code.style=official
 ksp.incremental=true
 ksp.incremental.log=true
 group=me.ahoo.coapi
-version=1.2.6
+version=1.2.8
 description=Streamlining HTTP client definition in Spring 6, CoApi provides zero boilerplate code auto-configuration for more convenient and efficient interface calls.
 website=https://github.com/Ahoo-Wang/CoApi
 issues=https://github.com/Ahoo-Wang/CoApi/issues
diff --git a/spring/src/main/kotlin/me/ahoo/coapi/spring/client/reactive/auth/BearerTokenFilter.kt b/spring/src/main/kotlin/me/ahoo/coapi/spring/client/reactive/auth/BearerTokenFilter.kt
index 5045889..9168ca6 100644
--- a/spring/src/main/kotlin/me/ahoo/coapi/spring/client/reactive/auth/BearerTokenFilter.kt
+++ b/spring/src/main/kotlin/me/ahoo/coapi/spring/client/reactive/auth/BearerTokenFilter.kt
@@ -23,8 +23,12 @@ class BearerTokenFilter(tokenProvider: ExpirableTokenProvider) :
     )
 
 object BearerHeaderValueMapper : HeaderValueMapper {
-    const val BEARER_TOKEN_PREFIX = "Bearer "
+    private const val BEARER_TOKEN_PREFIX = "Bearer "
+    fun String.withBearerPrefix(): String {
+        return "$BEARER_TOKEN_PREFIX$this"
+    }
+
     override fun map(headerValue: String): String {
-        return "$BEARER_TOKEN_PREFIX$headerValue"
+        return headerValue.withBearerPrefix()
     }
 }
diff --git a/spring/src/main/kotlin/me/ahoo/coapi/spring/client/reactive/auth/ExpirableTokenProvider.kt b/spring/src/main/kotlin/me/ahoo/coapi/spring/client/reactive/auth/ExpirableTokenProvider.kt
index 599887b..0c2af62 100644
--- a/spring/src/main/kotlin/me/ahoo/coapi/spring/client/reactive/auth/ExpirableTokenProvider.kt
+++ b/spring/src/main/kotlin/me/ahoo/coapi/spring/client/reactive/auth/ExpirableTokenProvider.kt
@@ -16,9 +16,9 @@ package me.ahoo.coapi.spring.client.reactive.auth
 import com.auth0.jwt.JWT
 import reactor.core.publisher.Mono
 
-data class ExpirableToken(val token: String, val expiresAt: Long) {
+data class ExpirableToken(val token: String, val expireAt: Long) {
     val isExpired: Boolean
-        get() = System.currentTimeMillis() > expiresAt
+        get() = System.currentTimeMillis() > expireAt
 
     companion object {
         private val jwtParser = JWT()
diff --git a/spring/src/test/kotlin/me/ahoo/coapi/spring/client/reactive/auth/BearerTokenFilterTest.kt b/spring/src/test/kotlin/me/ahoo/coapi/spring/client/reactive/auth/BearerTokenFilterTest.kt
index 5314165..c8401b4 100644
--- a/spring/src/test/kotlin/me/ahoo/coapi/spring/client/reactive/auth/BearerTokenFilterTest.kt
+++ b/spring/src/test/kotlin/me/ahoo/coapi/spring/client/reactive/auth/BearerTokenFilterTest.kt
@@ -1,6 +1,7 @@
 package me.ahoo.coapi.spring.client.reactive.auth
 
 import io.mockk.mockk
+import me.ahoo.coapi.spring.client.reactive.auth.BearerHeaderValueMapper.withBearerPrefix
 import me.ahoo.coapi.spring.client.reactive.auth.ExpirableToken.Companion.jwtToExpirableToken
 import org.hamcrest.MatcherAssert.assertThat
 import org.hamcrest.Matchers.equalTo
@@ -23,7 +24,7 @@ class BearerTokenFilterTest {
             .build()
         val jwtToken = JwtFixture.generateToken(Date())
         val nextException = ExchangeFunction { request ->
-            assertThat(request.headers().getFirst(HttpHeaders.AUTHORIZATION), equalTo("Bearer $jwtToken"))
+            assertThat(request.headers().getFirst(HttpHeaders.AUTHORIZATION), equalTo(jwtToken.withBearerPrefix()))
             Mono.empty()
         }
         val tokenProvider = object : ExpirableTokenProvider {