diff --git a/recipe.yaml b/recipe.yaml
index 20c475fb4796c4ffae5d1bb0eee05c8cfc903a3b..8b9086393c81953395f82ba73a6ca74a1a2641f3 100644
--- a/recipe.yaml
+++ b/recipe.yaml
@@ -68,3 +68,4 @@ input:
     - 'https://gitlab-registry.cern.ch/aml/qt/younes/containers/profile-ml:latest'
     - 'https://registry.hub.docker.com/dshope/paod-maker:*'
     - 'https://gitlab-registry.cern.ch/tadej/tnlimitfinder:master'
+    - 'https://registry.hub.docker.com/alintulu/cmssw:slc6'