diff --git a/.editorconfig b/.editorconfig
index aab17e9e..392fe661 100644
--- a/.editorconfig
+++ b/.editorconfig
@@ -8,7 +8,6 @@ max_line_length = 150
 ; Tab indentation (no size specified)
 indent_style = space
 charset = utf-8
-indent_size = 4
 
 [*.yml]
 indent_size = 2
diff --git a/src/commonMain/kotlin/io/github/oshai/kotlinlogging/KLogger.kt b/src/commonMain/kotlin/io/github/oshai/kotlinlogging/KLogger.kt
index 109fba4e..6a821e46 100644
--- a/src/commonMain/kotlin/io/github/oshai/kotlinlogging/KLogger.kt
+++ b/src/commonMain/kotlin/io/github/oshai/kotlinlogging/KLogger.kt
@@ -109,25 +109,40 @@ public interface KLogger {
     }
 
   /** Lazy add a log message with throwable payload if isTraceEnabled is true */
-  public fun atTrace(marker: Marker? = null, block: KLoggingEventBuilder.() -> Unit): Unit =
+  public fun atTrace(marker: Marker?, block: KLoggingEventBuilder.() -> Unit): Unit =
     at(Level.TRACE, marker, block)
 
+  /** Lazy add a log message with throwable payload if isTraceEnabled is true */
+  public fun atTrace(block: KLoggingEventBuilder.() -> Unit): Unit = at(Level.TRACE, null, block)
+
   /** Lazy add a log message with throwable payload if isDebugEnabled is true */
-  public fun atDebug(marker: Marker? = null, block: KLoggingEventBuilder.() -> Unit): Unit =
+  public fun atDebug(marker: Marker?, block: KLoggingEventBuilder.() -> Unit): Unit =
     at(Level.DEBUG, marker, block)
 
+  /** Lazy add a log message with throwable payload if isDebugEnabled is true */
+  public fun atDebug(block: KLoggingEventBuilder.() -> Unit): Unit = at(Level.DEBUG, null, block)
+
   /** Lazy add a log message with throwable payload if isInfoEnabled is true */
-  public fun atInfo(marker: Marker? = null, block: KLoggingEventBuilder.() -> Unit): Unit =
+  public fun atInfo(marker: Marker?, block: KLoggingEventBuilder.() -> Unit): Unit =
     at(Level.INFO, marker, block)
 
+  /** Lazy add a log message with throwable payload if isInfoEnabled is true */
+  public fun atInfo(block: KLoggingEventBuilder.() -> Unit): Unit = at(Level.INFO, null, block)
+
   /** Lazy add a log message with throwable payload if isWarnEnabled is true */
-  public fun atWarn(marker: Marker? = null, block: KLoggingEventBuilder.() -> Unit): Unit =
+  public fun atWarn(marker: Marker?, block: KLoggingEventBuilder.() -> Unit): Unit =
     at(Level.WARN, marker, block)
 
+  /** Lazy add a log message with throwable payload if isWarnEnabled is true */
+  public fun atWarn(block: KLoggingEventBuilder.() -> Unit): Unit = at(Level.WARN, null, block)
+
   /** Lazy add a log message with throwable payload if isErrorEnabled is true */
-  public fun atError(marker: Marker? = null, block: KLoggingEventBuilder.() -> Unit): Unit =
+  public fun atError(marker: Marker?, block: KLoggingEventBuilder.() -> Unit): Unit =
     at(Level.ERROR, marker, block)
 
+  /** Lazy add a log message with throwable payload if isErrorEnabled is true */
+  public fun atError(block: KLoggingEventBuilder.() -> Unit): Unit = at(Level.ERROR, null, block)
+
   /** Lazy add a log message if level enabled */
   public fun at(level: Level, marker: Marker? = null, block: KLoggingEventBuilder.() -> Unit)
 
diff --git a/src/javaMain/kotlin/io/github/oshai/kotlinlogging/slf4j/internal/LocationAwareKLogger.kt b/src/javaMain/kotlin/io/github/oshai/kotlinlogging/slf4j/internal/LocationAwareKLogger.kt
index 3dbeec27..b1b1e9b6 100644
--- a/src/javaMain/kotlin/io/github/oshai/kotlinlogging/slf4j/internal/LocationAwareKLogger.kt
+++ b/src/javaMain/kotlin/io/github/oshai/kotlinlogging/slf4j/internal/LocationAwareKLogger.kt
@@ -271,15 +271,27 @@ internal class LocationAwareKLogger(override val underlyingLogger: LocationAware
   override fun atDebug(marker: Marker?, block: KLoggingEventBuilder.() -> Unit): Unit =
     at(Level.DEBUG, marker, block)
 
+  /** Lazy add a log message with throwable payload if isDebugEnabled is true */
+  override fun atDebug(block: KLoggingEventBuilder.() -> Unit): Unit = at(Level.DEBUG, null, block)
+
   /** Lazy add a log message with throwable payload if isInfoEnabled is true */
   override fun atInfo(marker: Marker?, block: KLoggingEventBuilder.() -> Unit): Unit =
     at(Level.INFO, marker, block)
 
+  /** Lazy add a log message with throwable payload if isInfoEnabled is true */
+  override fun atInfo(block: KLoggingEventBuilder.() -> Unit): Unit = at(Level.INFO, null, block)
+
   /** Lazy add a log message with throwable payload if isWarnEnabled is true */
   override fun atWarn(marker: Marker?, block: KLoggingEventBuilder.() -> Unit): Unit =
     at(Level.WARN, marker, block)
 
+  /** Lazy add a log message with throwable payload if isWarnEnabled is true */
+  override fun atWarn(block: KLoggingEventBuilder.() -> Unit): Unit = at(Level.WARN, null, block)
+
   /** Lazy add a log message with throwable payload if isErrorEnabled is true */
   override fun atError(marker: Marker?, block: KLoggingEventBuilder.() -> Unit): Unit =
     at(Level.ERROR, marker, block)
+
+  /** Lazy add a log message with throwable payload if isErrorEnabled is true */
+  override fun atError(block: KLoggingEventBuilder.() -> Unit): Unit = at(Level.ERROR, null, block)
 }
diff --git a/versions.gradle.kts b/versions.gradle.kts
index b7f0e927..2b1f4132 100644
--- a/versions.gradle.kts
+++ b/versions.gradle.kts
@@ -1,4 +1,4 @@
-extra["slf4j_version"] = "2.0.6"
+extra["slf4j_version"] = "2.0.9"
 extra["coroutines_version"] = "1.6.4"
 extra["log4j_version"] = "2.22.0"
 extra["mockito_version"] = "4.11.0"