diff --git a/IHEC/Singularity.ihec b/IHEC/Singularity.ihec
index 15f973c4..dbf29ad4 100644
--- a/IHEC/Singularity.ihec
+++ b/IHEC/Singularity.ihec
@@ -1,5 +1,5 @@
-BootStrap: library
-From: ubuntu:16.04
+BootStrap: docker
+From: ubuntu:xenial
 
 %runscript
     exec /usr/local/bin/gemBS $@
diff --git a/Singularity b/Singularity
index 15f973c4..dbf29ad4 100644
--- a/Singularity
+++ b/Singularity
@@ -1,5 +1,5 @@
-BootStrap: library
-From: ubuntu:16.04
+BootStrap: docker
+From: ubuntu:xenial
 
 %runscript
     exec /usr/local/bin/gemBS $@