diff --git a/.arc/validation_packages.yml b/.arc/validation_packages.yml
new file mode 100644
index 0000000000000000000000000000000000000000..c86bf26de4b7ecd071a3df0ab7c4dfaa0ebd87d2
--- /dev/null
+++ b/.arc/validation_packages.yml
@@ -0,0 +1,4 @@
+arc_specification: 2.0.0-draft
+validation_packages:
+  - name: invenio
+    version: 2.1.0
diff --git a/assays/4_Microfluidic cultivation with gradient growth light and day night cycle/isa.assay.xlsx b/assays/4_Microfluidic cultivation with gradient growth light and day night cycle/isa.assay.xlsx
index e2daf3674c78c4fe8d1688d181e4259f9050fcd4..bcecdbe8639a15b677563b87254ad341b3b3edab 100644
Binary files a/assays/4_Microfluidic cultivation with gradient growth light and day night cycle/isa.assay.xlsx and b/assays/4_Microfluidic cultivation with gradient growth light and day night cycle/isa.assay.xlsx differ