diff --git a/README.md b/README.md
index d7963da..6ae3e66 100644
--- a/README.md
+++ b/README.md
@@ -89,29 +89,8 @@ Plugin versions are available for (at least) all minor versions of Elasticsearch
 
 The first 3 digits of plugin version is Elasticsearch versioning. The last digit is used for plugin versioning under an elasticsearch version.
 
-To install it, launch this command in Elasticsearch directory replacing the url by the correct link for your Elasticsearch version (see table)
-`./bin/elasticsearch-plugin install https://github.com/opendatasoft/elasticsearch-aggregation-envelope/releases/download/v8.19.4.0/envelope-aggregation-8.19.4.0.zip`
-
-| elasticsearch version | plugin version | plugin url                                                                                                                         |
-|-----------------------|----------------|------------------------------------------------------------------------------------------------------------------------------------|
-| 6.0.1                 | 6.0.1.0        | https://github.com/opendatasoft/elasticsearch-aggregation-envelope/releases/download/v6.0.1.0/envelope-aggregation-6.0.1.0.zip     |
-| 6.1.4                 | 6.1.4.0        | https://github.com/opendatasoft/elasticsearch-aggregation-envelope/releases/download/v6.1.4.0/envelope-aggregation-6.1.4.0.zip     |
-| 6.2.4                 | 6.2.4.0        | https://github.com/opendatasoft/elasticsearch-aggregation-envelope/releases/download/v6.2.4.0/envelope-aggregation-6.2.4.0.zip     |
-| 6.3.2                 | 6.3.2.0        | https://github.com/opendatasoft/elasticsearch-aggregation-envelope/releases/download/v6.3.2.0/envelope-aggregation-6.3.2.0.zip     |
-| 6.4.3                 | 6.4.3.0        | https://github.com/opendatasoft/elasticsearch-aggregation-envelope/releases/download/v6.4.3.0/envelope-aggregation-6.4.3.0.zip     |
-| 6.5.4                 | 6.5.4.0        | https://github.com/opendatasoft/elasticsearch-aggregation-envelope/releases/download/v6.5.4.0/envelope-aggregation-6.5.4.0.zip     |
-| 6.6.2                 | 6.6.2.0        | https://github.com/opendatasoft/elasticsearch-aggregation-envelope/releases/download/v6.6.2.0/envelope-aggregation-6.6.2.0.zip     |
-| 6.7.1                 | 6.7.1.0        | https://github.com/opendatasoft/elasticsearch-aggregation-envelope/releases/download/v6.7.1.0/envelope-aggregation-6.7.1.0.zip     |
-| 6.8.2                 | 6.8.2.0        | https://github.com/opendatasoft/elasticsearch-aggregation-envelope/releases/download/v6.8.2.0/envelope-aggregation-6.8.2.0.zip     |
-| 7.0.1                 | 7.0.1.0        | https://github.com/opendatasoft/elasticsearch-aggregation-envelope/releases/download/v7.0.1.0/envelope-aggregation-7.0.1.0.zip     |
-| 7.1.1                 | 7.1.1.0        | https://github.com/opendatasoft/elasticsearch-aggregation-envelope/releases/download/v7.1.1.0/envelope-aggregation-7.1.1.0.zip     |
-| 7.2.0                 | 7.2.0.0        | https://github.com/opendatasoft/elasticsearch-aggregation-envelope/releases/download/v7.2.0.0/envelope-aggregation-7.2.0.0.zip     |
-| 7.4.0                 | 7.4.0.0        | https://github.com/opendatasoft/elasticsearch-aggregation-envelope/releases/download/v7.4.0.0/envelope-aggregation-7.4.0.0.zip     |
-| 7.5.1                 | 7.5.1.0        | https://github.com/opendatasoft/elasticsearch-aggregation-envelope/releases/download/v7.5.1.0/envelope-aggregation-7.5.1.0.zip     |
-| 7.6.0                 | 7.6.0.0        | https://github.com/opendatasoft/elasticsearch-aggregation-envelope/releases/download/v7.6.0.0/envelope-aggregation-7.6.0.0.zip     |
-| 7.17.28               | 7.17.28.0      | https://github.com/opendatasoft/elasticsearch-aggregation-envelope/releases/download/v7.17.28.0/envelope-aggregation-7.17.28.0.zip |
-| 8.18.1                | 8.18.1.0       | https://github.com/opendatasoft/elasticsearch-aggregation-envelope/releases/download/v8.18.1.0/envelope-aggregation-8.18.1.0.zip   |
-| 8.19.4                | 8.19.4.0       | https://github.com/opendatasoft/elasticsearch-aggregation-envelope/releases/download/v8.19.4.0/envelope-aggregation-8.19.4.0.zip   |
+To install it, launch this command in Elasticsearch directory replacing the url by the correct link for your Elasticsearch version (see GitHub releases for available versions):
+`./bin/elasticsearch-plugin install https://github.com/opendatasoft/elasticsearch-aggregation-envelope/releases/download/v8.19.6.0/envelope-aggregation-8.19.6.0.zip`
 
 
 ## Development Environment Setup
diff --git a/gradle.properties b/gradle.properties
index 3ed2ee9..8117d5f 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -1,2 +1,2 @@
-es_version = 8.19.4
-plugin_version = 8.19.4.0
+es_version = 8.19.6
+plugin_version = 8.19.6.0
diff --git a/src/main/java/org/opendatasoft/elasticsearch/search/aggregations/metric/ConvexHullAggregationBuilder.java b/src/main/java/org/opendatasoft/elasticsearch/search/aggregations/metric/ConvexHullAggregationBuilder.java
index 2255787..f45a835 100644
--- a/src/main/java/org/opendatasoft/elasticsearch/search/aggregations/metric/ConvexHullAggregationBuilder.java
+++ b/src/main/java/org/opendatasoft/elasticsearch/search/aggregations/metric/ConvexHullAggregationBuilder.java
@@ -53,7 +53,7 @@ protected ConvexHullAggregationBuilder(
 
     @Override
     public TransportVersion getMinimalSupportedVersion() {
-        return TransportVersions.MINIMUM_COMPATIBLE;
+        return TransportVersion.zero();
     }
 
     @Override