diff --git a/DESCRIPTION b/DESCRIPTION
index e27b0fa..284fd19 100644
--- a/DESCRIPTION
+++ b/DESCRIPTION
@@ -27,11 +27,11 @@ Suggests:
     knitr,
     rmarkdown,
     testthat (>= 3.0.0)
-Depends: R(>= 2.8)
+Depends: R(>= 3.5.0)
 BugReports: https://github.com/waternumbers/FKF/issues
 URL: https://waternumbers.github.io/FKF/, https://github.com/waternumbers/FKF
 NeedsCompilation: yes
-RoxygenNote: 7.2.3
+RoxygenNote: 7.3.0
 VignetteBuilder: knitr
 X-CRAN-Original-Maintainer: Marc Weibel <marc.weibel@zhaw.ch>
 X-CRAN-Comment: Orphaned on 2018-02-11 as email address bounced when
diff --git a/NAMESPACE b/NAMESPACE
index cd215a7..9e67f9c 100644
--- a/NAMESPACE
+++ b/NAMESPACE
@@ -4,7 +4,6 @@ S3method(plot,fkf)
 S3method(plot,fks)
 export(fkf)
 export(fks)
-exportClasses(fkf)
 import(graphics)
 importFrom(grDevices,rainbow)
 importFrom(stats,acf)
diff --git a/R/FKF-package.R b/R/FKF-package.R
index 117b64a..ed072fe 100644
--- a/R/FKF-package.R
+++ b/R/FKF-package.R
@@ -5,6 +5,5 @@
 #' @import graphics
 #' @importFrom grDevices rainbow
 #' @importFrom stats acf ccf ppoints qchisq qnorm qqnorm qqplot
-#' @exportClass fkf
 NULL