diff --git a/scripts/bump-version.py b/scripts/bump-version.py
index 361e7877258e6954c7f267931908d6016ff8f216..25873539b389ad80b481086c7f23e50751e637ce 100755
--- a/scripts/bump-version.py
+++ b/scripts/bump-version.py
@@ -42,6 +42,6 @@ lines = open(vfile).readlines()
 for i, line in enumerate(lines):
   if line.startswith("From: registry.scicore.unibas.ch/schwede/openstructure:"):
     lines[i] = 'From: registry.scicore.unibas.ch/schwede/openstructure:'+\
-      '"%s"' % version_string
+      '%s' % version_string
     break
 open(vfile, "w").writelines(lines)
diff --git a/singularity/Singularity b/singularity/Singularity
index 222fe694ea6657a943ed386ba0e8e078653c589f..a9b790a9c8ad776c03e56aa973240aed32fa007b 100644
--- a/singularity/Singularity
+++ b/singularity/Singularity
@@ -1,5 +1,5 @@
 BootStrap: docker
-From: registry.scicore.unibas.ch/schwede/openstructure:"2.0.0"
+From: registry.scicore.unibas.ch/schwede/openstructure:2.0.0
 
 %post
 ##############################################################################