diff --git a/DESCRIPTION b/DESCRIPTION
index 16efe18..e576fac 100644
--- a/DESCRIPTION
+++ b/DESCRIPTION
@@ -28,7 +28,8 @@ BugReports: https://github.com/jrowen/rhandsontable/issues
 Imports:
     jsonlite,
     htmlwidgets (>= 0.3.3),
-    magrittr
+    magrittr,
+    methods
 Suggests:
     knitr,
     rmarkdown,
diff --git a/NAMESPACE b/NAMESPACE
index 042ed51..808bb24 100644
--- a/NAMESPACE
+++ b/NAMESPACE
@@ -18,5 +18,6 @@ export(rhandsontable)
 import(htmlwidgets)
 import(jsonlite)
 importFrom(magrittr,"%>%")
+importFrom(methods,as)
 importFrom(utils,capture.output)
 importFrom(utils,modifyList)
diff --git a/R/rhandsontable-package.R b/R/rhandsontable-package.R
index 022d55d..f57f25b 100644
--- a/R/rhandsontable-package.R
+++ b/R/rhandsontable-package.R
@@ -7,6 +7,7 @@
 #' @docType package
 #' @import htmlwidgets jsonlite
 #' @importFrom utils modifyList capture.output
+#' @importFrom methods as
 NULL
 
 #' rhandsontable exported operators