diff --git a/apptainer/iguana.def b/apptainer/iguana.def
index 31a1a78b..26e043d9 100644
--- a/apptainer/iguana.def
+++ b/apptainer/iguana.def
@@ -9,4 +9,4 @@ Stage: build
     TAG=latest
 
 %post
-    dnf upgrade
+    dnf upgrade -y