diff --git a/deploy_checkit_tiff/Dockerfile b/deploy_checkit_tiff/centos6/Dockerfile
similarity index 98%
rename from deploy_checkit_tiff/Dockerfile
rename to deploy_checkit_tiff/centos6/Dockerfile
index d64e3783fd18f382d1793b4782578b1ef4aae7f2..b6b2c70d48eaafe0997455a6e68ccee7a35adf44 100644
--- a/deploy_checkit_tiff/Dockerfile
+++ b/deploy_checkit_tiff/centos6/Dockerfile
@@ -3,9 +3,7 @@ MAINTAINER Andreas Romeyke <romeyke@slub-dresden.de>
 # current could be 0.3.1 or 0.4.0, because 0.4.0 is bugfixed version of
 # checkit_tiff with rules compatible to 0.3.1 based on Handreichung TIFF v1.2
 # in checkit_tiff 0.4.1 the rules are adapted to Handreichung TIFF v1.3
-# ENV checkit_tiff_current_version=v0.4.0.1
 ENV checkit_tiff_current_version=v0.5.2
-# ENV checkit_tiff_upcoming_version=v0.4.2
 ENV checkit_tiff_upcoming_version=v0.5.2
 # ENV checkit_tiff_gitrepository=https://github.com/SLUB-digitalpreservation/checkit_tiff.git
 ENV checkit_tiff_gitrepository=http://art1pirat.spdns.org/art1/checkit_tiff.git