diff --git a/ors-api/src/main/java/org/heigit/ors/api/responses/export/topojson/Properties.java b/ors-api/src/main/java/org/heigit/ors/api/responses/export/topojson/Properties.java
index 8b7fb067da..86b42b98c0 100644
--- a/ors-api/src/main/java/org/heigit/ors/api/responses/export/topojson/Properties.java
+++ b/ors-api/src/main/java/org/heigit/ors/api/responses/export/topojson/Properties.java
@@ -2,8 +2,10 @@
 
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.databind.annotation.JsonSerialize;
 import lombok.Builder;
 import lombok.Getter;
+import org.heigit.ors.api.responses.export.json.WeightSerializer;
 
 import java.io.Serializable;
 import java.util.List;
@@ -13,6 +15,7 @@
 @Builder
 public class Properties implements Serializable {
     @JsonProperty("weight")
+    @JsonSerialize(using = WeightSerializer.class)
     private Double weight;
     @JsonProperty("osm_id")
     private Long osmId;