diff --git a/DESCRIPTION b/DESCRIPTION
index fdf222593fd0ece78c9b197d728d49f3bba9594a..2d94ca8c737f092585d0262de1a6385998b87d6e 100644
--- a/DESCRIPTION
+++ b/DESCRIPTION
@@ -18,11 +18,11 @@ Authors@R: c(person("Sebastian",
                     comment = c(ORCID = "0000-0001-6581-1654")),
              person("Helmholtz-Zentrum fuer Umweltforschung GmbH - UFZ",
                     role = c("cph", "fnd")))
-Description: The stress addition approach is an alternative to the traditional 
-    concentration addition or effect addition models. It allows the modelling 
-    of tri-phasic concentration-response relationships either as single toxicant 
-    experiments, in combination with an environmental stressor or as mixtures of 
-    two toxicants. See Liess et al. (2019) <doi:10.1038/s41598-019-51645-4> 
+Description: The stress addition approach is an alternative to the traditional
+    concentration addition or effect addition models. It allows the modelling
+    of tri-phasic concentration-response relationships either as single toxicant
+    experiments, in combination with an environmental stressor or as mixtures of
+    two toxicants. See Liess et al. (2019) <doi:10.1038/s41598-019-51645-4>
     and Liess et al. (2020) <doi:10.1186/s12302-020-00394-7>.
 License: GPL-3
 Copyright: file inst/COPYRIGHTS
diff --git a/man/stressaddition-package.Rd b/man/stressaddition-package.Rd
index 224c8fcac0f15f93ecee4bb53715aabbe692885b..31865dcc918bb1cda0c794c89950cdc486301024 100644
--- a/man/stressaddition-package.Rd
+++ b/man/stressaddition-package.Rd
@@ -6,11 +6,11 @@
 \alias{stressaddition-package}
 \title{stressaddition: Modelling Tri-Phasic Concentration-Response Relationships}
 \description{
-The stress addition approach is an alternative to the traditional 
-    concentration addition or effect addition models. It allows the modelling 
-    of tri-phasic concentration-response relationships either as single toxicant 
-    experiments, in combination with an environmental stressor or as mixtures of 
-    two toxicants. See Liess et al. (2019) <doi:10.1038/s41598-019-51645-4> 
+The stress addition approach is an alternative to the traditional
+    concentration addition or effect addition models. It allows the modelling
+    of tri-phasic concentration-response relationships either as single toxicant
+    experiments, in combination with an environmental stressor or as mixtures of
+    two toxicants. See Liess et al. (2019) <doi:10.1038/s41598-019-51645-4>
     and Liess et al. (2020) <doi:10.1186/s12302-020-00394-7>.
 }
 \details{