diff --git a/src/singularity_modules/urqt/d62c1f8/urqt.def b/src/singularity_modules/urqt/d62c1f8/urqt.def
index 6bfeb23f9c4a7d0f8bac94b92eb4d0ec62adb932..21e78ce162d9d9ecbb6fb9509de299ebe42800c9 100644
--- a/src/singularity_modules/urqt/d62c1f8/urqt.def
+++ b/src/singularity_modules/urqt/d62c1f8/urqt.def
@@ -1,4 +1,4 @@
-Bootstrap: library
+Bootstrap: docker
 From: debian:9
 
 %labels