diff --git a/astra/src/main/java/com/slack/astra/zipkinApi/ZipkinService.java b/astra/src/main/java/com/slack/astra/zipkinApi/ZipkinService.java
index c7de18ae1f..8a5986fc39 100644
--- a/astra/src/main/java/com/slack/astra/zipkinApi/ZipkinService.java
+++ b/astra/src/main/java/com/slack/astra/zipkinApi/ZipkinService.java
@@ -117,7 +117,7 @@ protected static String convertLogWireMessageToZipkinSpan(List<LogWireMessage> m
         span.setRemoteEndpoint(remoteEndpoint);
       }
       span.setTimestamp(convertToMicroSeconds(message.getTimestamp()));
-      span.setDuration(Math.toIntExact(duration));
+      span.setDuration(duration);
       span.setTags(messageTags);
       traces.add(span);
     }
diff --git a/astra/src/main/java/com/slack/astra/zipkinApi/ZipkinSpanResponse.java b/astra/src/main/java/com/slack/astra/zipkinApi/ZipkinSpanResponse.java
index b07ee59525..d3ba5668de 100644
--- a/astra/src/main/java/com/slack/astra/zipkinApi/ZipkinSpanResponse.java
+++ b/astra/src/main/java/com/slack/astra/zipkinApi/ZipkinSpanResponse.java
@@ -23,8 +23,8 @@ public class ZipkinSpanResponse {
   private ZipkinEndpointResponse remoteEndpoint = null;
 
   @JsonProperty("duration")
-  // Zipkin spec defines this is integer, even though a long seems like it would be more appropriate
-  private int durationMicros;
+  // Zipkin spec defines this is integer64, so a long seems like a  more appropriate
+  private long durationMicros;
 
   private String kind;
 
@@ -48,7 +48,7 @@ public void setTimestamp(long timestampMicros) {
     this.timestampMicros = timestampMicros;
   }
 
-  public void setDuration(int durationMicros) {
+  public void setDuration(long durationMicros) {
     this.durationMicros = durationMicros;
   }
 
@@ -96,7 +96,7 @@ public long getTimestamp() {
     return timestampMicros;
   }
 
-  public int getDuration() {
+  public long getDuration() {
     return durationMicros;
   }