diff --git a/README.md b/README.md
index e28e1ec0..446133f3 100644
--- a/README.md
+++ b/README.md
@@ -52,7 +52,7 @@ nexus and to the maven repo (last is only possibly from master).
 ## Release Notes
 
 ### 0.33.0
-
+- Use TLongObjectMap instead of TIntObjectMap in Multigraph
 
 ### 0.32.0
 - Remove use of the temporary parameter "multiple" for poi gravitation
diff --git a/pom.xml b/pom.xml
index dbe7ae03..7119ed39 100644
--- a/pom.xml
+++ b/pom.xml
@@ -4,7 +4,7 @@
 
     <groupId>com.targomo</groupId>
     <artifactId>java-client</artifactId>
-    <version>0.33.0-SNAPSHOT</version>
+    <version>0.33.0-SNAPSHOT-LONG</version>
     <name>Targomo Java Client Library</name>
     <description>Java client library for easy usage of Targomo web services.</description>
     <url>https://github.com/targomo/targomo-java</url>
@@ -220,7 +220,7 @@
         <dependency>
             <groupId>com.targomo</groupId>
             <artifactId>jackson-datatype-trove</artifactId>
-            <version>0.0.8</version>
+            <version>0.0.9</version>
         </dependency>
         <dependency>
             <groupId>org.jetbrains</groupId>
diff --git a/src/main/java/com/targomo/client/Constants.java b/src/main/java/com/targomo/client/Constants.java
index 91d34ab4..37854d89 100644
--- a/src/main/java/com/targomo/client/Constants.java
+++ b/src/main/java/com/targomo/client/Constants.java
@@ -6,6 +6,7 @@ public class Constants {
 
     public static final float NO_VALUE_ENTRY_FLOAT_TROVE_MAPS = -Float.MAX_VALUE;
     public static final int NO_VALUE_ENTRY_INT_TROVE_MAPS = Integer.MIN_VALUE;
+    public static final long NO_VALUE_ENTRY_LONG_TROVE_MAPS = Long.MIN_VALUE;
 
     public static final String POLYGON_VALUES                                           = "values";
     public static final String POLYGON_INTERSECTION_MODE                                = "intersectionMode";
diff --git a/src/main/java/com/targomo/client/api/StatisticTravelOptions.java b/src/main/java/com/targomo/client/api/StatisticTravelOptions.java
index 02699197..ca90e5f8 100644
--- a/src/main/java/com/targomo/client/api/StatisticTravelOptions.java
+++ b/src/main/java/com/targomo/client/api/StatisticTravelOptions.java
@@ -97,6 +97,9 @@ public class StatisticTravelOptions extends TravelOptions {
     @Transient
     private boolean useStatisticTargets = false;
 
+    @Transient
+    private Integer multiGraphH3FixedZoomLevel;
+
     @Override
     public boolean equals(Object o) {
         if (this == o) return true;
@@ -107,6 +110,7 @@ public boolean equals(Object o) {
         return super.equals(o) &&
                 Objects.equals(useH3Reachability, that.useH3Reachability) &&
                 Objects.equals(useStatisticTargets, that.useStatisticTargets) &&
+                Objects.equals(multiGraphH3FixedZoomLevel, that.multiGraphH3FixedZoomLevel) &&
                 Objects.equals(getClosestSources, that.getClosestSources) &&
                 Objects.equals(omitIndividualStatistics, that.omitIndividualStatistics) &&
                 Objects.equals(inactiveSources, that.inactiveSources) &&
@@ -135,7 +139,7 @@ public int hashCode() {
                 multiGraphDomainStatisticCollectionId, multiGraphLayerUnboundedStatistics, multiGraphReferencedStatisticIds,
                 multiGraphTravelTimeApproximation, statisticIds, chartInterval, statisticCollectionId,
                 multigraphCalculateGravitationPerReferenceId, returnOriginId, competingRoutingOptions,
-                routingAggregationType.ordinal(), multiGraphIgnoreRoutingErrorMessages);
+                routingAggregationType.ordinal(), multiGraphIgnoreRoutingErrorMessages, multiGraphH3FixedZoomLevel);
     }
 
     @Override
@@ -182,6 +186,8 @@ public String toString(){
         builder.append(useH3Reachability);
         builder.append("\n\tuseStatisticTargets: ");
         builder.append(useStatisticTargets);
+        builder.append("\n\tmultiGraphH3FixedZoomLevel: ");
+        builder.append(multiGraphH3FixedZoomLevel);
         builder.append("\n}\n");
         return builder.toString();
     }
diff --git a/src/main/java/com/targomo/client/api/pojo/MultiGraph.java b/src/main/java/com/targomo/client/api/pojo/MultiGraph.java
index 68ba4b8e..7629149a 100644
--- a/src/main/java/com/targomo/client/api/pojo/MultiGraph.java
+++ b/src/main/java/com/targomo/client/api/pojo/MultiGraph.java
@@ -4,8 +4,8 @@
 import com.fasterxml.jackson.annotation.JsonIgnore;
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.targomo.client.api.enums.MultiGraphDomainType;
-import gnu.trove.map.TIntFloatMap;
 import gnu.trove.map.TIntObjectMap;
+import gnu.trove.map.TLongFloatMap;
 
 import java.util.HashMap;
 import java.util.Map;
@@ -16,7 +16,7 @@
  */
 public class MultiGraph extends BaseGraph {
 
-    private final Map<String, TIntFloatMap> layers;
+    private final Map<String, TLongFloatMap> layers;
 
     // the type of the layer: values per vertex or per edge
     private final MultiGraphDomainType domainType;
@@ -30,7 +30,7 @@ public MultiGraph(long networkID, MultiGraphDomainType domainType){
     @JsonCreator
     public MultiGraph(@JsonProperty("networkID") long networkID,
                       @JsonProperty("nodes") TIntObjectMap<double[]> nodes,
-                      @JsonProperty("layers") Map<String,TIntFloatMap> layers,
+                      @JsonProperty("layers") Map<String, TLongFloatMap> layers,
                       @JsonProperty("edges") TIntObjectMap<int[]> edges,
                       @JsonProperty("supportingPoints") TIntObjectMap<double[][]> supportingPoints,
                       @JsonProperty("domainType") MultiGraphDomainType domainType) {
@@ -39,7 +39,7 @@ public MultiGraph(@JsonProperty("networkID") long networkID,
         this.domainType = domainType;
     }
 
-    public Map<String, TIntFloatMap> getLayers() {
+    public Map<String, TLongFloatMap> getLayers() {
         return layers;
     }
 
diff --git a/src/main/java/com/targomo/client/api/request/MultiGraphRequest.java b/src/main/java/com/targomo/client/api/request/MultiGraphRequest.java
index 8a901356..944fddea 100644
--- a/src/main/java/com/targomo/client/api/request/MultiGraphRequest.java
+++ b/src/main/java/com/targomo/client/api/request/MultiGraphRequest.java
@@ -27,6 +27,7 @@ public class MultiGraphRequest<R extends MultiGraphResponse<?>> extends TargomoR
 
     static {
         MAPPER.registerModule(new TroveModule(Constants.NO_VALUE_ENTRY_INT_TROVE_MAPS,
+                Constants.NO_VALUE_ENTRY_LONG_TROVE_MAPS,
                 Constants.NO_VALUE_ENTRY_FLOAT_TROVE_MAPS)); //required to properly deserialize MultiGraphs
     }