diff --git a/pom.xml b/pom.xml
index b7fe7d7..01de007 100644
--- a/pom.xml
+++ b/pom.xml
@@ -306,7 +306,7 @@ SOFTWARE.
     <dependency>
       <groupId>ch.qos.logback</groupId>
       <artifactId>logback-classic</artifactId>
-      <version>1.4.4</version>
+      <version>1.4.13</version>
     </dependency>
     <dependency>
       <groupId>org.eolang</groupId>