diff --git a/chat/build.gradle b/chat/build.gradle
index c6cdae52..d4b9590f 100644
--- a/chat/build.gradle
+++ b/chat/build.gradle
@@ -41,7 +41,7 @@ kotlin {
                 implementation "io.ktor:ktor-server-call-logging"
                 implementation "io.ktor:ktor-server-default-headers"
                 implementation "io.ktor:ktor-server-sessions"
-                implementation "ch.qos.logback:logback-classic:1.4.6"
+                implementation "ch.qos.logback:logback-classic:1.5.9"
             }
         }
 
diff --git a/client-multipart/build.gradle b/client-multipart/build.gradle
index 576a9022..97c57f39 100644
--- a/client-multipart/build.gradle
+++ b/client-multipart/build.gradle
@@ -29,7 +29,7 @@ repositories {
 dependencies {
     implementation 'org.jetbrains.kotlin:kotlin-stdlib-jdk8:1.9.21'
     implementation "io.ktor:ktor-server-html-builder"
-    implementation 'ch.qos.logback:logback-classic:1.4.6'
+    implementation 'ch.qos.logback:logback-classic:1.5.9'
     implementation 'io.ktor:ktor-server-netty-jvm'
     implementation 'io.ktor:ktor-client-cio-jvm'
 }
diff --git a/client-tools/build.gradle b/client-tools/build.gradle
index 3d3eb952..3a4159be 100644
--- a/client-tools/build.gradle
+++ b/client-tools/build.gradle
@@ -29,7 +29,7 @@ repositories {
 dependencies {
     implementation 'org.jetbrains.kotlin:kotlin-stdlib-jdk8:1.9.21'
     implementation "io.ktor:ktor-server-html-builder"
-    implementation 'ch.qos.logback:logback-classic:1.4.6'
+    implementation 'ch.qos.logback:logback-classic:1.5.9'
     implementation 'io.ktor:ktor-server-netty-jvm'
     implementation 'io.ktor:ktor-client-cio-jvm'
 }
diff --git a/fullstack-mpp/build.gradle b/fullstack-mpp/build.gradle
index 6b0e2d22..ab93f5a8 100644
--- a/fullstack-mpp/build.gradle
+++ b/fullstack-mpp/build.gradle
@@ -45,7 +45,7 @@ kotlin {
                 implementation "io.ktor:ktor-server-netty"
                 implementation "io.ktor:ktor-server-html-builder"
                 implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk8"
-                implementation "ch.qos.logback:logback-classic:1.4.6"
+                implementation "ch.qos.logback:logback-classic:1.5.9"
             }
         }
         backendTest {
diff --git a/graalvm/build.gradle.kts b/graalvm/build.gradle.kts
index 758f79aa..d1be4677 100644
--- a/graalvm/build.gradle.kts
+++ b/graalvm/build.gradle.kts
@@ -16,7 +16,7 @@ repositories {
 }
 
 dependencies {
-    implementation("ch.qos.logback:logback-classic:1.4.6")
+    implementation("ch.qos.logback:logback-classic:1.5.9")
     implementation("io.ktor:ktor-server-core-jvm")
     implementation("io.ktor:ktor-server-cio-jvm")
 
diff --git a/jwt-auth-tests/build.gradle.kts b/jwt-auth-tests/build.gradle.kts
index 0e3b4869..6842b0d0 100644
--- a/jwt-auth-tests/build.gradle.kts
+++ b/jwt-auth-tests/build.gradle.kts
@@ -19,7 +19,7 @@ dependencies {
     implementation("io.ktor:ktor-server-auth-jwt")
     implementation("io.ktor:ktor-server-content-negotiation")
     implementation("io.ktor:ktor-serialization-kotlinx-json")
-    implementation("ch.qos.logback:logback-classic:1.4.6")
+    implementation("ch.qos.logback:logback-classic:1.5.9")
     testImplementation("io.ktor:ktor-server-test-host")
     testImplementation(kotlin("test"))
 }