diff --git a/gradle/libs.versions.toml b/gradle/libs.versions.toml
index a6a9ae3..8768efe 100644
--- a/gradle/libs.versions.toml
+++ b/gradle/libs.versions.toml
@@ -77,10 +77,11 @@ koin-androidx-compose = { module = "io.insert-koin:koin-androidx-compose" }
 koin-compose = { module = "io.insert-koin:koin-compose" }
 koin-compose-viewmodel = { module = "io.insert-koin:koin-compose-viewmodel" }
 koin-compose-viewmodel-navigation = { module = "io.insert-koin:koin-compose-viewmodel-navigation" }
+koin-ktor = { module = "io.insert-koin:koin-ktor" }
+koin-logger-slf4j = { module = "io.insert-koin:koin-logger-slf4j" }
+koin-test = { module = "io.insert-koin:koin-test" }
 # z.Zt. alpha
 #koin-compose-viewmodel-navigation3 = { module = "io.insert-koin:koin-compose-viewmodel-navigation3" }
-koin-ktor = { module = "io.insert-koin:koin-ktor" }
-koin-test = { module = "io.insert-koin:koin-test" }
 # ----
 
 # Settings vorerst ohne externe Hilfe
diff --git a/server/build.gradle.kts b/server/build.gradle.kts
index f92c67f..6f7bb2c 100644
--- a/server/build.gradle.kts
+++ b/server/build.gradle.kts
@@ -3,6 +3,7 @@ plugins {
     alias(libs.plugins.ktor)
     application
     alias(libs.plugins.kotlinSerialization)
+    alias(libs.plugins.koin.compiler)
     alias(masterLibs.plugins.versionPlugin)
 }
 
@@ -27,11 +28,16 @@ dependencies {
     implementation(libs.ktor.serverCore)
     implementation(libs.ktor.serverNetty)
     implementation(libs.ktor.serverAuth)
-    implementation(libs.ktor.serverAuthApiKey)
     implementation(libs.ktor.serverAuthJwt)
     implementation(libs.ktor.serverContentNegotiation)
     implementation(libs.ktor.serializationJson)
 
+    implementation(project.dependencies.platform(libs.koin.bom))
+    implementation(libs.koin.logger.slf4j)
+    implementation(libs.koin.annotations)
+    implementation(libs.koin.ktor)
+//    implementation("io.insert-koin:koin-logger-slf4j:4.1.2-Beta1")
+
     testImplementation(libs.ktor.serverTestHost)
     testImplementation(libs.kotlin.testJunit)
 }
diff --git a/server/buildnumber.properties b/server/buildnumber.properties
index 50ccf1d..3d9ac76 100644
--- a/server/buildnumber.properties
+++ b/server/buildnumber.properties
@@ -1,3 +1,3 @@
 #auto generated
-#Sat Feb 07 17:52:53 CET 2026
-build.number=25
+#Sat Feb 07 20:02:00 CET 2026
+build.number=27
diff --git a/server/src/main/kotlin/net/keinekekse/app/Application.kt b/server/src/main/kotlin/net/keinekekse/app/Application.kt
index 164ac48..7dac0ab 100644
--- a/server/src/main/kotlin/net/keinekekse/app/Application.kt
+++ b/server/src/main/kotlin/net/keinekekse/app/Application.kt
@@ -3,6 +3,7 @@ package net.keinekekse.app
 import io.github.oshai.kotlinlogging.KotlinLogging
 import io.ktor.server.application.*
 import net.keinekekse.app.server.VERSION
+import net.keinekekse.app.server.config.configureKoin
 import net.keinekekse.app.server.config.configureRouting
 import net.keinekekse.app.server.config.configureSecurity
 
@@ -22,6 +23,7 @@ fun main(args: Array<String>): Unit = io.ktor.server.netty.EngineMain.main(args)
 fun Application.module() {
     logger.info { "\n**\n** Starting  ${VERSION.displayName} - ${VERSION.description} ${VERSION.fullVersion}\n**" }
 
+    configureKoin()
     configureSecurity()
     configureRouting()
 }
diff --git a/server/src/main/kotlin/net/keinekekse/app/server/Version.kt b/server/src/main/kotlin/net/keinekekse/app/server/Version.kt
index 1072529..7f083cc 100644
--- a/server/src/main/kotlin/net/keinekekse/app/server/Version.kt
+++ b/server/src/main/kotlin/net/keinekekse/app/server/Version.kt
@@ -3,14 +3,14 @@ package net.keinekekse.app.server
 import net.keinekekse.version.Version
 
 object VERSION: Version {
-    override val version = "0.1.0-beta.1+build.25"
-    override val fullVersion = "0.1.0-beta.1+build.25"
+    override val version = "0.1.0-beta.1+build.27"
+    override val fullVersion = "0.1.0-beta.1+build.27"
     override val major = 0
     override val minor = 1
     override val patch = 0
     override val preRelease = "beta.1"
-    override val buildMetadata = "build.25"
-    override val buildDate = "2026-02-07T16:52:53.281643Z"
+    override val buildMetadata = "build.27"
+    override val buildDate = "2026-02-07T19:02:00.909145Z"
     override val displayName = "kAS"
     override val copyright = "Copyright (c) 2026 Hartmut Bauer"
     override val name = "server"
diff --git a/server/src/main/kotlin/net/keinekekse/app/server/config/koin.kt b/server/src/main/kotlin/net/keinekekse/app/server/config/koin.kt
new file mode 100644
index 0000000..f763a6f
--- /dev/null
+++ b/server/src/main/kotlin/net/keinekekse/app/server/config/koin.kt
@@ -0,0 +1,14 @@
+package net.keinekekse.app.server.config
+
+import io.ktor.server.application.*
+import net.keinekekse.app.server.di.KoinApp
+import org.koin.dsl.koinConfiguration
+import org.koin.logger.slf4jLogger
+import org.koin.plugin.module.dsl.withConfiguration
+
+fun Application.configureKoin() {
+    koinConfiguration {
+        slf4jLogger()
+        withConfiguration<KoinApp>()
+    }
+}
diff --git a/server/src/main/kotlin/net/keinekekse/app/server/di/KoinApp.kt b/server/src/main/kotlin/net/keinekekse/app/server/di/KoinApp.kt
new file mode 100644
index 0000000..3b3590b
--- /dev/null
+++ b/server/src/main/kotlin/net/keinekekse/app/server/di/KoinApp.kt
@@ -0,0 +1,6 @@
+package net.keinekekse.app.server.di
+
+import org.koin.core.annotation.KoinApplication
+
+@KoinApplication
+class KoinApp
diff --git a/server/src/main/kotlin/net/keinekekse/app/server/di/KoinModule.kt b/server/src/main/kotlin/net/keinekekse/app/server/di/KoinModule.kt
new file mode 100644
index 0000000..5fcbca7
--- /dev/null
+++ b/server/src/main/kotlin/net/keinekekse/app/server/di/KoinModule.kt
@@ -0,0 +1,10 @@
+package net.keinekekse.app.server.di
+
+import org.koin.core.annotation.ComponentScan
+import org.koin.core.annotation.Configuration
+import org.koin.core.annotation.Module
+
+@Module
+@ComponentScan("net.keinekekse.app")
+@Configuration
+class KoinModule