diff --git a/CHANGELOG.md b/CHANGELOG.md
index cd162b0..65b25c2 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,10 +1,11 @@
 Changelog for eva-submission
 ============================
 
-## 1.15.6 (unreleased)
+## 1.15.6 (2024-04-23)
 ----------------------
 
-- Nothing changed yet.
+- Use NCBI eutils key whenever possible.
+- New script to test sample ownership.
 
 
 ## 1.15.5 (2024-04-12)
diff --git a/eva_submission/VERSION b/eva_submission/VERSION
index a2fd7da..04cc999 100644
--- a/eva_submission/VERSION
+++ b/eva_submission/VERSION
@@ -1 +1 @@
-1.15.6.dev0
+1.15.6
diff --git a/eva_submission/etc/eva_project_conf.yaml b/eva_submission/etc/eva_project_conf.yaml
index 47c396b..d964469 100644
--- a/eva_submission/etc/eva_project_conf.yaml
+++ b/eva_submission/etc/eva_project_conf.yaml
@@ -118,7 +118,8 @@ Sample:
   cast:
     Sample ID: string
     Sample Name: string
-
+    Title: string
+    cultivar: string
 
 Files:
   required: