diff --git a/xxl-job-admin/pom.xml b/xxl-job-admin/pom.xml
index 54ffa44..e225528 100644
--- a/xxl-job-admin/pom.xml
+++ b/xxl-job-admin/pom.xml
@@ -54,7 +54,7 @@
 		<dependency>
 			<groupId>org.slf4j</groupId>
 			<artifactId>slf4j-log4j12</artifactId>
-			<version>1.7.5</version>
+			<version>1.7.21</version>
 		</dependency>
 
 		<!-- freemarker -->

diff --git a/xxl-job-admin/pom.xml b/xxl-job-admin/pom.xml
index 54ffa44..e225528 100644
--- a/xxl-job-admin/pom.xml
+++ b/xxl-job-admin/pom.xml
@@ -54,7 +54,7 @@
 		<dependency>
 			<groupId>org.slf4j</groupId>
 			<artifactId>slf4j-log4j12</artifactId>
-			<version>1.7.5</version>
+			<version>1.7.21</version>
 		</dependency>
 
 		<!-- freemarker -->
diff --git a/xxl-job-core/pom.xml b/xxl-job-core/pom.xml
index 3faa4c3..befb58b 100644
--- a/xxl-job-core/pom.xml
+++ b/xxl-job-core/pom.xml
@@ -41,7 +41,7 @@
 		<dependency>
 			<groupId>org.slf4j</groupId>
 			<artifactId>slf4j-log4j12</artifactId>
-			<version>1.7.5</version>
+			<version>1.7.21</version>
 		</dependency>
 
 		<!-- hessian -->