diff --git a/build.gradle b/build.gradle
index 07ba684d0..cf562848c 100644
--- a/build.gradle
+++ b/build.gradle
@@ -345,7 +345,7 @@ dependencies {
   implementation group: 'com.github.hmcts.java-logging', name: 'logging', version: '6.1.4'
   implementation group: 'org.apache.logging.log4j', name: 'log4j-api', version: log4JVersion
   implementation group: 'org.apache.logging.log4j', name: 'log4j-to-slf4j', version: log4JVersion
-  implementation group: 'ch.qos.logback', name: 'logback-classic', version: '1.5.4'
+  implementation group: 'ch.qos.logback', name: 'logback-classic', version: '1.5.6'
   implementation group: 'ch.qos.logback', name: 'logback-core', version: '1.5.4'
 
   implementation group: 'io.github.openfeign', name: 'feign-okhttp', version: '13.2.1'
@@ -375,7 +375,7 @@ dependencies {
   // https://mvnrepository.com/artifact/com.sun.mail/javax.mail
   implementation group: 'com.sun.mail', name: 'javax.mail', version: '1.6.2'
 
-  implementation group: 'ch.qos.logback', name: 'logback-classic', version: '1.5.4'
+  implementation group: 'ch.qos.logback', name: 'logback-classic', version: '1.5.6'
   implementation group: 'ch.qos.logback', name: 'logback-core', version: '1.5.4'
   implementation group: 'com.sun.xml.bind', name: 'jaxb-impl', version: '2.3.9'
   annotationProcessor 'org.mapstruct:mapstruct-processor:1.5.5.Final'