diff --git a/build.sbt b/build.sbt
index adca0fe..afaf31b 100644
--- a/build.sbt
+++ b/build.sbt
@@ -3,7 +3,7 @@ ThisBuild / scalaVersion := "3.3.7"
 
 val fs2DataVersion = "1.8.1"
 val http4sVersion = "0.23.33"
-val latisVersion  = "792d62ed"
+val latisVersion  = "8880e46d"
 val latisHapiVersion = "d70da0a5"
 
 lazy val root = (project in file("."))
diff --git a/src/main/scala/latis/ops/ConvertHapiTypes.scala b/src/main/scala/latis/ops/ConvertHapiTypes.scala
index e0cf68d..4c67917 100644
--- a/src/main/scala/latis/ops/ConvertHapiTypes.scala
+++ b/src/main/scala/latis/ops/ConvertHapiTypes.scala
@@ -27,6 +27,7 @@ class ConvertHapiTypes extends MapOperation {
 
   private def convertValue(data: Data): Data = data match {
     case v: ShortValue => IntValue(v.value.toInt)
+    case v: LongValue  => IntValue(v.value.toInt) //TODO: risk of overflow
     case v: FloatValue => DoubleValue(v.value.toDouble)
     case _             => data //no-op, shouldn't get here due to catalog filter
   }
@@ -45,6 +46,10 @@ class ConvertHapiTypes extends MapOperation {
       Scalar.fromMetadata(
         scalar.metadata + ("type" -> "int")
       ).fold(throw _, identity) //should not fail
+    case LongValueType =>
+      Scalar.fromMetadata(
+        scalar.metadata + ("type" -> "int")
+      ).fold(throw _, identity) //should not fail
     case _ => scalar //no-op, shouldn't get here due to catalog filter
   }
 }
diff --git a/src/main/scala/latis/service/hapi/HapiService.scala b/src/main/scala/latis/service/hapi/HapiService.scala
index 8a93310..6888098 100644
--- a/src/main/scala/latis/service/hapi/HapiService.scala
+++ b/src/main/scala/latis/service/hapi/HapiService.scala
@@ -50,6 +50,7 @@ class HapiService(catalog: Catalog) extends ServiceInterface(catalog, OperationR
       case "string" => md.getProperty("size").isDefined
       case "double" => true
       case "int"    => true
+      case "long"   => true
       case "float"  => true //may be converted to double by ConvertHapiTypes
       case "short"  => true //may be converted to int by ConvertHapiTypes
       case _        => false