diff --git a/enabler/src/de/schildbach/pte/dto/Departure.java b/enabler/src/de/schildbach/pte/dto/Departure.java
index 58b3b52c..d463bca3 100644
--- a/enabler/src/de/schildbach/pte/dto/Departure.java
+++ b/enabler/src/de/schildbach/pte/dto/Departure.java
@@ -17,12 +17,13 @@
 
 package de.schildbach.pte.dto;
 
+import java.io.Serializable;
 import java.util.Date;
 
 /**
  * @author Andreas Schildbach
  */
-public final class Departure
+public final class Departure implements Serializable
 {
 	final public Date plannedTime;
 	final public Date predictedTime;
diff --git a/enabler/src/de/schildbach/pte/dto/GetConnectionDetailsResult.java b/enabler/src/de/schildbach/pte/dto/GetConnectionDetailsResult.java
index 7aed3d24..d81765e6 100644
--- a/enabler/src/de/schildbach/pte/dto/GetConnectionDetailsResult.java
+++ b/enabler/src/de/schildbach/pte/dto/GetConnectionDetailsResult.java
@@ -17,13 +17,14 @@
 
 package de.schildbach.pte.dto;
 
+import java.io.Serializable;
 import java.text.SimpleDateFormat;
 import java.util.Date;
 
 /**
  * @author Andreas Schildbach
  */
-public final class GetConnectionDetailsResult
+public final class GetConnectionDetailsResult implements Serializable
 {
 	public final Date currentDate;
 	public final Connection connection;
diff --git a/enabler/src/de/schildbach/pte/dto/LineDestination.java b/enabler/src/de/schildbach/pte/dto/LineDestination.java
index ea80e250..1d97e993 100644
--- a/enabler/src/de/schildbach/pte/dto/LineDestination.java
+++ b/enabler/src/de/schildbach/pte/dto/LineDestination.java
@@ -17,10 +17,12 @@
 
 package de.schildbach.pte.dto;
 
+import java.io.Serializable;
+
 /**
  * @author Andreas Schildbach
  */
-public final class LineDestination
+public final class LineDestination implements Serializable
 {
 	final public Line line;
 	final public Location destination;
diff --git a/enabler/src/de/schildbach/pte/dto/NearbyStationsResult.java b/enabler/src/de/schildbach/pte/dto/NearbyStationsResult.java
index e3f4a51a..e095ee3f 100644
--- a/enabler/src/de/schildbach/pte/dto/NearbyStationsResult.java
+++ b/enabler/src/de/schildbach/pte/dto/NearbyStationsResult.java
@@ -17,12 +17,13 @@
 
 package de.schildbach.pte.dto;
 
+import java.io.Serializable;
 import java.util.List;
 
 /**
  * @author Andreas Schildbach
  */
-public final class NearbyStationsResult
+public final class NearbyStationsResult implements Serializable
 {
 	public enum Status
 	{
diff --git a/enabler/src/de/schildbach/pte/dto/QueryDeparturesResult.java b/enabler/src/de/schildbach/pte/dto/QueryDeparturesResult.java
index a20cd8e7..3d3f6855 100644
--- a/enabler/src/de/schildbach/pte/dto/QueryDeparturesResult.java
+++ b/enabler/src/de/schildbach/pte/dto/QueryDeparturesResult.java
@@ -17,13 +17,14 @@
 
 package de.schildbach.pte.dto;
 
+import java.io.Serializable;
 import java.util.LinkedList;
 import java.util.List;
 
 /**
  * @author Andreas Schildbach
  */
-public final class QueryDeparturesResult
+public final class QueryDeparturesResult implements Serializable
 {
 	public enum Status
 	{
diff --git a/enabler/src/de/schildbach/pte/dto/StationDepartures.java b/enabler/src/de/schildbach/pte/dto/StationDepartures.java
index 56fcd9f8..b558115b 100644
--- a/enabler/src/de/schildbach/pte/dto/StationDepartures.java
+++ b/enabler/src/de/schildbach/pte/dto/StationDepartures.java
@@ -17,12 +17,13 @@
 
 package de.schildbach.pte.dto;
 
+import java.io.Serializable;
 import java.util.List;
 
 /**
  * @author Andreas Schildbach
  */
-public final class StationDepartures
+public final class StationDepartures implements Serializable
 {
 	public final Location location;
 	public final List<Departure> departures;