diff --git a/.gitignore b/.gitignore
index 32358936d0b933fa577bc062610396a386202048..8e7869a3a1ebe7e8bc71ad83c4268a5fae6cb1c0 100644
--- a/.gitignore
+++ b/.gitignore
@@ -3,3 +3,7 @@
 
 # ignore build r package:
 sybil_*.tar.gz
+
+# ignore Mac OS X Finder databases:
+.DS_Store
+
diff --git a/DESCRIPTION b/DESCRIPTION
index 7b8e05125114dc8ca0461420eb9cb8674ef37cf2..befcb9803fa6e318440157310e238aeb615db651 100644
--- a/DESCRIPTION
+++ b/DESCRIPTION
@@ -1,12 +1,13 @@
 Package: sybilGUROBI
 Type: Package
 Title: Gurobi support for sybil
-Version: 1.0.5
-Date: 2015-11-16
-Authors@R: c(person("Gabriel", "Gelius-Dietrich", role = c("aut", "cre"), email = "geliudie@uni-duesseldorf.de"))
+Version: 1.0.6
+Date: 2018-09-24
+Authors@R: c(person("Mayo", "Roettger", role = "cre", email = "mayo.roettger@hhu.de"),
+    person("Gabriel", "Gelius-Dietrich", role = "aut", email = "geliudie@uni-duesseldorf.de"))
 Depends: R (>= 2.14.2), sybil (>= 1.2.2), gurobi, Matrix, methods
 Description: Gurobi support for sybil
 License: GPL-3
-Packaged: 2015-11-16 11:00:00 UTC; jonathan
-Author: Gabriel Gelius-Dietrich [aut, cre]
-Maintainer: Gabriel Gelius-Dietrich <geliudie@uni-duesseldorf.de>
+Packaged: 2018-09-24 09:25:00 UTC; mayo
+Author: Gabriel Gelius-Dietrich [aut]
+Maintainer: Mayo Roettger <mayo.roettger@hhu.de>
diff --git a/R/optObj_sybilGUROBIClass.R b/R/optObj_sybilGUROBIClass.R
index 0a572b2ad1d3fd09cb54a5e1bce7cf2e64d932f5..35fd43b79698a5c14a92f4a8b2c349acba5238f3 100644
--- a/R/optObj_sybilGUROBIClass.R
+++ b/R/optObj_sybilGUROBIClass.R
@@ -27,7 +27,9 @@
 #------------------------------------------------------------------------------#
 
 setClass(Class = "optObj_sybilGUROBI",
-         representation(grb = "character"),
+         slots = c(
+                 grb = "character"
+                 ),
          contains = "optObj")
 
 
diff --git a/inst/NEWS.Rd b/inst/NEWS.Rd
index 9f2b7fa9acd819d92543afb35eb2f9aa63523e30..ce122cae5c7abffd1b7b015830d356e37e23eefe 100644
--- a/inst/NEWS.Rd
+++ b/inst/NEWS.Rd
@@ -6,6 +6,15 @@
 
 \newcommand{\CRANpkg}{\href{http://CRAN.R-project.org/package=#1}{\pkg{#1}}}
 
+% ---------------------------------------------------------------------------- %
+\section{Changes in version 1.0.6 2018-09-24}{
+  \itemize{
+    \item maintainer change version 1.0.6
+    \item changed \code{representation(grb = "character"} in class \code{optObj_sybilGUROBI}
+          into \code{slots = c(grb = "character")"") 
+  }
+}
+
 % ---------------------------------------------------------------------------- %
 \section{Changes in version 1.0.5 2015-11-16}{
   \itemize{