diff --git a/DESCRIPTION b/DESCRIPTION
index 6dde3869..a0c95252 100644
--- a/DESCRIPTION
+++ b/DESCRIPTION
@@ -25,7 +25,11 @@ Authors@R:
       person(given = "Martin",
              family = "Binder",
              role = "aut",
-             email = "martin.binder@mail.com"))
+             email = "martin.binder@mail.com"),
+      person(given = "Olaf",
+             family = "Mersmann",
+             role = "ctb",
+             email = "olafm@statistik.tu-dortmund.de"))
 Description: Provides a common framework for optimization of black-box functions
     for other packages, e.g. 'mlr3'. It offers various optimization methods e.g. 
     grid search, random search and generalized simulated annealing. 
diff --git a/R/OptimizerNLoptr.R b/R/OptimizerNLoptr.R
index 42139759..8dfa0c5a 100644
--- a/R/OptimizerNLoptr.R
+++ b/R/OptimizerNLoptr.R
@@ -32,7 +32,7 @@
 #'
 #' @export
 #' @examples
-#' \dontrun{
+#' \donttest{
 #' library(paradox)
 #' library(data.table)
 #'
diff --git a/man/OptimizerNLoptr.Rd b/man/OptimizerNLoptr.Rd
index 24875c67..c6913f73 100644
--- a/man/OptimizerNLoptr.Rd
+++ b/man/OptimizerNLoptr.Rd
@@ -34,7 +34,7 @@ defaults. To deactivate these conditions, set them to \code{-1}.
 }
 
 \examples{
-\dontrun{
+\donttest{
 library(paradox)
 library(data.table)
 
diff --git a/man/bbotk-package.Rd b/man/bbotk-package.Rd
index 06f6a4f0..91186837 100644
--- a/man/bbotk-package.Rd
+++ b/man/bbotk-package.Rd
@@ -30,4 +30,9 @@ Authors:
   \item Martin Binder \email{martin.binder@mail.com}
 }
 
+Other contributors:
+\itemize{
+  \item Olaf Mersmann \email{olafm@statistik.tu-dortmund.de} [contributor]
+}
+
 }