diff --git a/doma-spring-boot-autoconfigure/pom.xml b/doma-spring-boot-autoconfigure/pom.xml
index de48f93..ef14c0d 100644
--- a/doma-spring-boot-autoconfigure/pom.xml
+++ b/doma-spring-boot-autoconfigure/pom.xml
@@ -26,7 +26,6 @@
             <groupId>org.seasar.doma</groupId>
             <artifactId>doma-slf4j</artifactId>
             <version>${doma.version}</version>
-            <optional>true</optional>
         </dependency>
         <dependency>
             <groupId>org.springframework</groupId>
diff --git a/doma-spring-boot-autoconfigure/src/main/java/org/seasar/doma/boot/autoconfigure/DomaProperties.java b/doma-spring-boot-autoconfigure/src/main/java/org/seasar/doma/boot/autoconfigure/DomaProperties.java
index 396e340..6ed224d 100644
--- a/doma-spring-boot-autoconfigure/src/main/java/org/seasar/doma/boot/autoconfigure/DomaProperties.java
+++ b/doma-spring-boot-autoconfigure/src/main/java/org/seasar/doma/boot/autoconfigure/DomaProperties.java
@@ -75,7 +75,7 @@ public class DomaProperties {
 	/**
 	 * Type of {@link JdbcLogger}.
 	 */
-	private JdbcLoggerType jdbcLogger = JdbcLoggerType.JUL;
+	private JdbcLoggerType jdbcLogger = JdbcLoggerType.SLF4J;
 
 	/**
 	 * Limit for the maximum number of rows. Ignored unless this value is greater than 0.
diff --git a/doma-spring-boot-autoconfigure/src/test/java/org/seasar/doma/boot/autoconfigure/DomaAutoConfigurationTest.java b/doma-spring-boot-autoconfigure/src/test/java/org/seasar/doma/boot/autoconfigure/DomaAutoConfigurationTest.java
index b5b068b..c638e1b 100644
--- a/doma-spring-boot-autoconfigure/src/test/java/org/seasar/doma/boot/autoconfigure/DomaAutoConfigurationTest.java
+++ b/doma-spring-boot-autoconfigure/src/test/java/org/seasar/doma/boot/autoconfigure/DomaAutoConfigurationTest.java
@@ -57,6 +57,7 @@
 import org.seasar.doma.jdbc.statistic.DefaultStatisticManager;
 import org.seasar.doma.jdbc.statistic.StatisticManager;
 import org.seasar.doma.message.Message;
+import org.seasar.doma.slf4j.Slf4jJdbcLogger;
 import org.springframework.beans.factory.BeanCreationException;
 import org.springframework.beans.factory.NoSuchBeanDefinitionException;
 import org.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration;
@@ -96,7 +97,7 @@ public void testAutoRegisteredConfig() {
 		assertThat(config.getSqlFileRepository(),
 				is(instanceOf(GreedyCacheSqlFileRepository.class)));
 		assertThat(config.getNaming(), is(Naming.DEFAULT));
-		assertThat(config.getJdbcLogger(), is(instanceOf(UtilLoggingJdbcLogger.class)));
+		assertThat(config.getJdbcLogger(), is(instanceOf(Slf4jJdbcLogger.class)));
 		assertThat(config.getEntityListenerProvider(), is(notNullValue()));
 		assertThat(config.getDuplicateColumnHandler(),
 				is(ConfigSupport.defaultDuplicateColumnHandler));