diff --git a/pom.xml b/pom.xml
index 3250f92..64f3a4c 100644
--- a/pom.xml
+++ b/pom.xml
@@ -109,7 +109,7 @@
         <maven-plugin-api.version>3.9.11</maven-plugin-api.version>
         <maven-plugin-annotations.version>3.15.2</maven-plugin-annotations.version>
         <slf4j.version>2.0.17</slf4j.version>
-        <logback.version>1.5.20</logback.version>
+        <logback.version>1.5.21</logback.version>
         <!-- versions of test dependencies -->
         <jacoco.version>0.8.12</jacoco.version>
         <jacoco.version>0.8.14</jacoco.version>