diff --git a/demo-android-standalone/app/build.gradle.kts b/demo-android-standalone/app/build.gradle.kts
index 0d7750e..b5aaf1b 100644
--- a/demo-android-standalone/app/build.gradle.kts
+++ b/demo-android-standalone/app/build.gradle.kts
@@ -44,7 +44,7 @@ android {
     }
 }
 
-val epothekeSdkVersion = "1.1.3"
+val epothekeSdkVersion = "1.1.5-SNAPSHOT"
 
 dependencies {
     androidTestImplementation("androidx.test.ext:junit:1.1.5")
diff --git a/demo-react-native/android/app/build.gradle b/demo-react-native/android/app/build.gradle
index b7a036b..af0aac9 100644
--- a/demo-react-native/android/app/build.gradle
+++ b/demo-react-native/android/app/build.gradle
@@ -123,7 +123,7 @@ android {
     }
 } 
 
-def epothekeSdkVersion = "1.1.3"
+def epothekeSdkVersion = "1.1.5-SNAPSHOT"
 
 dependencies {
     // The version of react-native is set by the React Native Gradle Plugin
diff --git a/sdk/src/commonMain/kotlin/com/epotheke/erezept/model/PrescriptionModel.common.kt b/sdk/src/commonMain/kotlin/com/epotheke/erezept/model/PrescriptionModel.common.kt
index b53a7b1..400eafe 100644
--- a/sdk/src/commonMain/kotlin/com/epotheke/erezept/model/PrescriptionModel.common.kt
+++ b/sdk/src/commonMain/kotlin/com/epotheke/erezept/model/PrescriptionModel.common.kt
@@ -191,6 +191,7 @@ enum class GenericErrorResultType(val value: String) {
     UNKNOWN_ERROR("UNKNOWN_ERROR");
 }
 
+@Serializable
 sealed interface MedicationItem
 
 @Serializable
@@ -285,6 +286,7 @@ data class Person(
     val vorsatzwort: String? = null,
 )
 
+@Serializable
 sealed interface Address
 
 @Serializable
@@ -307,6 +309,7 @@ data class PobAddress(
     val postfach: String,
 ) : Address
 
+@Serializable
 sealed interface PrescriptionInterface
 
 @Serializable