diff --git a/gitlab-ci/validate_workflows.control b/gitlab-ci/validate_workflows.control
index 5ac1fee145450286eb0f65bf9067b4492cbad073..a15e40efd1a648bf707d96d470124802b6043bd8 100644
--- a/gitlab-ci/validate_workflows.control
+++ b/gitlab-ci/validate_workflows.control
@@ -6,3 +6,4 @@ Description: This is a meta tool to validate files based on specified SLUBArchiv
 Homepage: https://git.slub-dresden.de/digital-preservation/validate_workflows
 Section: main
 Priority: optional
+Recommends: mediaconch, checkit_tiff_upcoming, checkit_tiff_current, iccDumpProfile, ewf-tools, verapdf