diff --git a/.changelog/v0.9.1.md b/.changelog/v0.9.1.md
new file mode 100644
index 0000000..2529b95
--- /dev/null
+++ b/.changelog/v0.9.1.md
@@ -0,0 +1,7 @@
+> 对应核心版本: [**v4.0.1**](https://github.com/simple-robot/simpler-robot/releases/tag/v4.0.1)
+
+
+我们欢迎并期望着您的的[反馈](https://github.com/simple-robot/simbot-component-onebot/issues)或[协助](https://github.com/simple-robot/simbot-component-onebot/pulls)，
+感谢您的贡献与支持！
+
+也欢迎您为我们献上一颗 `star`，这是对我们最大的鼓励与认可！
diff --git a/buildSrc/src/main/kotlin/P.kt b/buildSrc/src/main/kotlin/P.kt
index e466c04..39f7913 100644
--- a/buildSrc/src/main/kotlin/P.kt
+++ b/buildSrc/src/main/kotlin/P.kt
@@ -41,7 +41,7 @@ object P {
         override val homepage: String get() = HOMEPAGE
 
 
-        private val baseVersion = v(0, 9, 0)
+        private val baseVersion = v(0, 9, 1)
 
         val snapshotVersion = baseVersion - Version.SNAPSHOT
         override val version = if (isSnapshot()) snapshotVersion else baseVersion
diff --git a/simbot-component-onebot-v11/simbot-component-onebot-v11-core/src/commonMain/kotlin/love/forte/simbot/component/onebot/v11/core/bot/OneBotBot.kt b/simbot-component-onebot-v11/simbot-component-onebot-v11-core/src/commonMain/kotlin/love/forte/simbot/component/onebot/v11/core/bot/OneBotBot.kt
index d3901ae..131ffe0 100644
--- a/simbot-component-onebot-v11/simbot-component-onebot-v11-core/src/commonMain/kotlin/love/forte/simbot/component/onebot/v11/core/bot/OneBotBot.kt
+++ b/simbot-component-onebot-v11/simbot-component-onebot-v11-core/src/commonMain/kotlin/love/forte/simbot/component/onebot/v11/core/bot/OneBotBot.kt
@@ -57,6 +57,11 @@ import kotlin.jvm.JvmSynthetic
  * 且在重新连接的过程中始终失败并达到了重试次数上限，此时会话中的任务会被视为因异常结束，
  * 并连带 [OneBotBot] 的任务一同终结。
  *
+ * ### 日志
+ *
+ * [OneBotBot] 的内部会输出三种日志：
+ * - `love.forte.simbot.component.onebot.v11.core.bot.OneBotBot.$uniqueId`
+ *   bot的基本日志，例如连接信息、接收到的原始事件等debug日志。
  *
  * @author ForteScarlet
  */
diff --git a/simbot-component-onebot-v11/simbot-component-onebot-v11-core/src/commonMain/kotlin/love/forte/simbot/component/onebot/v11/core/bot/internal/OneBotBotImpl.kt b/simbot-component-onebot-v11/simbot-component-onebot-v11-core/src/commonMain/kotlin/love/forte/simbot/component/onebot/v11/core/bot/internal/OneBotBotImpl.kt
index f8e86ff..cf401e8 100644
--- a/simbot-component-onebot-v11/simbot-component-onebot-v11-core/src/commonMain/kotlin/love/forte/simbot/component/onebot/v11/core/bot/internal/OneBotBotImpl.kt
+++ b/simbot-component-onebot-v11/simbot-component-onebot-v11-core/src/commonMain/kotlin/love/forte/simbot/component/onebot/v11/core/bot/internal/OneBotBotImpl.kt
@@ -102,6 +102,11 @@ internal class OneBotBotImpl(
     private val eventProcessor: EventProcessor,
     baseDecoderJson: Json,
 ) : OneBotBot, JobBasedBot() {
+    companion object {
+        private const val BASE_LOGGER_NAME =
+            "love.forte.simbot.component.onebot.v11.core.bot.OneBotBot"
+    }
+
     override val subContext = coroutineContext.minusKey(Job)
     override val decoderJson: Json = Json(baseDecoderJson) {
         configuration.serializersModule?.also { confMd ->
@@ -109,10 +114,7 @@ internal class OneBotBotImpl(
         }
     }
 
-    internal val logger = LoggerFactory
-        .getLogger(
-            "love.forte.simbot.component.onebot.v11.core.bot.OneBotBot.$uniqueId"
-        )
+    internal val logger = LoggerFactory.getLogger("$BASE_LOGGER_NAME.$uniqueId")
 
     private val eventServerHost = configuration.eventServerHost
     private val connectMaxRetryTimes = configuration.wsConnectMaxRetryTimes
@@ -319,14 +321,14 @@ internal class OneBotBotImpl(
 
             while (session == null && retryTimes <= connectMaxRetryTimes) {
                 try {
-                    logger.debug("Connect to ws server {}", eventServerHost)
+                    logger.debug("Connect to ws server {}", wsHost)
                     session = createSession()
                 } catch (e: Exception) {
                     retryTimes++
 
                     @Suppress("ConvertTwoComparisonsToRangeCheck")
                     if (connectMaxRetryTimes > 0 && retryTimes > connectMaxRetryTimes) {
-                        "Connect to ws server $eventServerHost failed in $retryTimes times.".also { msg ->
+                        "Connect to ws server $wsHost failed in $retryTimes times.".also { msg ->
                             val ex = IllegalStateException(msg)
                             sessionJob.completeExceptionally(ex)
 
@@ -337,7 +339,7 @@ internal class OneBotBotImpl(
                     if (logger.isWarnEnabled()) {
                         logger.warn(
                             "Connect to ws server {} failed: {}, retry in {}...",
-                            eventServerHost,
+                            wsHost,
                             e.message,
                             connectRetryDelay.toString(),
                             e,
@@ -384,7 +386,7 @@ internal class OneBotBotImpl(
 
                 if (currentSession == null) return
 
-                logger.debug("Connected to ws server {}, session: {}", eventServerHost, currentSession)
+                logger.debug("Connected to ws server {}, session: {}", wsHost, currentSession)
 
                 this@WsEventSession.session = currentSession
 
diff --git a/simbot-component-onebot-v11/simbot-component-onebot-v11-core/src/jvmMain/kotlin/love/forte/simbot/component/onebot/v11/core/api/OneBotApiRequests.jvm.kt b/simbot-component-onebot-v11/simbot-component-onebot-v11-core/src/jvmMain/kotlin/love/forte/simbot/component/onebot/v11/core/api/OneBotApiRequests.jvm.kt
index 17be698..c4d43a0 100644
--- a/simbot-component-onebot-v11/simbot-component-onebot-v11-core/src/jvmMain/kotlin/love/forte/simbot/component/onebot/v11/core/api/OneBotApiRequests.jvm.kt
+++ b/simbot-component-onebot-v11/simbot-component-onebot-v11-core/src/jvmMain/kotlin/love/forte/simbot/component/onebot/v11/core/api/OneBotApiRequests.jvm.kt
@@ -557,4 +557,4 @@ public fun <T : Any> OneBotApi<T>.requestDataReserve(
 
 
 internal actual fun initConfig(key: String, default: String?): String? =
-    System.getProperty(key)
+    System.getProperty(key) ?: default
diff --git a/simbot-component-onebot-v11/simbot-component-onebot-v11-core/src/jvmTest/resources/log4j2.xml b/simbot-component-onebot-v11/simbot-component-onebot-v11-core/src/jvmTest/resources/log4j2.xml
index b3ce07d..797f27f 100644
--- a/simbot-component-onebot-v11/simbot-component-onebot-v11-core/src/jvmTest/resources/log4j2.xml
+++ b/simbot-component-onebot-v11/simbot-component-onebot-v11-core/src/jvmTest/resources/log4j2.xml
@@ -9,6 +9,9 @@
         <Logger name="love.forte.simbot.component.onebot" level="debug" additivity="false">
             <AppenderRef ref="Console"/>
         </Logger>
+        <Logger name="io.ktor.client" level="debug" additivity="false">
+            <AppenderRef ref="Console"/>
+        </Logger>
         <Root level="error">
             <AppenderRef ref="Console"/>
         </Root>