diff --git a/build.sbt b/build.sbt
index 2f70d66dc..658908be3 100644
--- a/build.sbt
+++ b/build.sbt
@@ -6,7 +6,7 @@ Global / scalaVersion := "3.3.3"
 Global / scalacOptions += "-explain"
 
 lazy val CirceVersion = "0.14.9"
-lazy val ElasticsearchVersion = "8.14.3"
+lazy val ElasticsearchVersion = "8.15.0"
 lazy val Elastic4sVersion = "8.14.1"
 lazy val ElastiknnVersion = IO.read(file("version")).strip()
 lazy val LuceneVersion = "9.10.0"
diff --git a/docker/Dockerfile b/docker/Dockerfile
index 36a5bbe76..cb0b4444d 100644
--- a/docker/Dockerfile
+++ b/docker/Dockerfile
@@ -1,3 +1,3 @@
-FROM docker.elastic.co/elasticsearch/elasticsearch:8.14.3
+FROM docker.elastic.co/elasticsearch/elasticsearch:8.15.0
 COPY elastiknn-plugin/target/elastiknn*.zip .
 RUN elasticsearch-plugin install -b file:$(ls elastiknn*zip | sort | tail -n1)
diff --git a/docs/pages/installation.md b/docs/pages/installation.md
index 209f6a406..5b5455c57 100644
--- a/docs/pages/installation.md
+++ b/docs/pages/installation.md
@@ -42,8 +42,8 @@ Make a Dockerfile like below.
 The image version (`elasticsearch:A.B.C`) must match the plugin's version (e.g. `A.B.C.x/elastiknn-A.B.C.x`).
 
 ```docker
-FROM docker.elastic.co/elasticsearch/elasticsearch:8.14.3
-RUN elasticsearch-plugin install --batch https://github.com/alexklibisz/elastiknn/releases/download/8.14.3.0/elastiknn-8.14.3.0.zip
+FROM docker.elastic.co/elasticsearch/elasticsearch:8.15.0
+RUN elasticsearch-plugin install --batch https://github.com/alexklibisz/elastiknn/releases/download/8.15.0.0/elastiknn-8.15.0.0.zip
 ```
 
 Build and run the Dockerfile. If you have any issues please refer to the [official docs.](https://www.elastic.co/guide/en/elasticsearch/reference/current/docker.html)
diff --git a/elastiknn-plugin/src/main/scala/com/klibisz/elastiknn/mapper/VectorMapper.scala b/elastiknn-plugin/src/main/scala/com/klibisz/elastiknn/mapper/VectorMapper.scala
index 29d0b35fc..742112615 100644
--- a/elastiknn-plugin/src/main/scala/com/klibisz/elastiknn/mapper/VectorMapper.scala
+++ b/elastiknn-plugin/src/main/scala/com/klibisz/elastiknn/mapper/VectorMapper.scala
@@ -110,20 +110,24 @@ abstract class VectorMapper[V <: Vec: XContentCodec.Decoder] { self =>
 
   private final class Builder(field: String, mapping: Mapping) extends FieldMapper.Builder(field) {
 
+    private val thisBuilder: Builder = this
+
     override def build(context: MapperBuilderContext): FieldMapper =
       new FieldMapper(
         field,
-        new VectorMapper.FieldType(CONTENT_TYPE, context.buildFullName(name), mapping),
+        new VectorMapper.FieldType(CONTENT_TYPE, context.buildFullName(thisBuilder.leafName), mapping),
         multiFieldsBuilder.build(this, context),
         copyTo
       ) {
+        private val thisMapper: FieldMapper = this
+
         override def parsesArrayValue(): Boolean = true
 
         override def parse(context: DocumentParserContext): Unit = {
           val doc = context.doc()
           val parser = context.parser()
           val vec: V = XContentCodec.decodeUnsafe[V](parser)
-          val fields = checkAndCreateFields(mapping, name, vec).get
+          val fields = checkAndCreateFields(mapping, thisMapper.fieldType().name(), vec).get
           fields.foreach(doc.add)
         }
 
@@ -139,7 +143,7 @@ abstract class VectorMapper[V <: Vec: XContentCodec.Decoder] { self =>
           XContentCodec.Encoder.mapping.encodeElastiknnObject(mapping, builder)
         }
 
-        override def getMergeBuilder: FieldMapper.Builder = new Builder(simpleName(), mapping)
+        override def getMergeBuilder: FieldMapper.Builder = new Builder(thisMapper.leafName(), mapping)
       }
 
     override def getParameters: Array[FieldMapper.Parameter[_]] =
diff --git a/version b/version
index 706594d66..6342972c1 100644
--- a/version
+++ b/version
@@ -1 +1 @@
-8.14.3.0
\ No newline at end of file
+8.15.0.0
\ No newline at end of file