diff --git a/build.gradle.kts b/build.gradle.kts
index 5781be9..48f8434 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -11,7 +11,7 @@ val kotest_version: String by project
 
 plugins {
     kotlin("jvm") version "2.1.10"
-    id("io.ktor.plugin") version "2.3.8"
+    id("io.ktor.plugin") version "2.3.13"
     id("org.jetbrains.kotlin.plugin.serialization") version "2.1.10"
     id("org.jlleitschuh.gradle.ktlint") version "12.2.0"
 }
@@ -62,8 +62,10 @@ dependencies {
     implementation("org.jetbrains.kotlinx:kotlinx-serialization-json-jvm:$kotlin_serialization_version")
     implementation("org.jetbrains.kotlinx:kotlinx-datetime:0.6.2")
 
-    testImplementation("io.kotest:kotest-extensions-koin:6.0.0.M2")
-    testImplementation("io.ktor:ktor-server-tests-jvm")
+    // Force version of sub library (for security)
+    implementation("commons-codec:commons-codec:1.13")
+
+    testImplementation("io.kotest:kotest-extensions-koin:$kotest_version")
     testImplementation("org.jetbrains.kotlin:kotlin-test-junit:$kotlin_version")
     testImplementation("io.ktor:ktor-server-test-host-jvm:2.3.11")
     testImplementation("io.kotest:kotest-runner-junit5:$kotest_version")
diff --git a/gradle.properties b/gradle.properties
index 8aa2f04..6bf0b33 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -1,11 +1,9 @@
-ktor_version=3.0.3
+ktor_version=3.1.1
 kotlin_version=2.1.10
 kotlin_serialization_version=1.8.0
-logback_version=1.5.16
+logback_version=1.5.17
 koin_version=4.0.2
-kotlin_logging_version=5.1.0
-#kotlin_logging_version=7.0.4
-kotest_version=5.9.1
-#kotest_version=6.0.0
+kotlin_logging_version=7.0.5
+kotest_version=6.0.0.M2
 
 kotlin.code.style=official
diff --git a/src/main/kotlin/eventDemo/app/entity/Player.kt b/src/main/kotlin/eventDemo/app/entity/Player.kt
index f5f65ee..43b13c6 100644
--- a/src/main/kotlin/eventDemo/app/entity/Player.kt
+++ b/src/main/kotlin/eventDemo/app/entity/Player.kt
@@ -3,7 +3,6 @@ package eventDemo.app.entity
 import eventDemo.configuration.PlayerIdSerializer
 import eventDemo.configuration.UUIDSerializer
 import eventDemo.libs.event.AggregateId
-import io.ktor.server.auth.Principal
 import kotlinx.serialization.Serializable
 import java.util.UUID
 
@@ -12,7 +11,7 @@ data class Player(
     val name: String,
     @Serializable(with = PlayerIdSerializer::class)
     val id: PlayerId = PlayerId(UUID.randomUUID()),
-) : Principal {
+) {
     constructor(id: String, name: String) : this(
         name,
         PlayerId(UUID.fromString(id)),