diff --git a/R-package/NAMESPACE b/R-package/NAMESPACE
index f3a7390b7..3fb05b7d8 100644
--- a/R-package/NAMESPACE
+++ b/R-package/NAMESPACE
@@ -21,10 +21,6 @@ exportMethods(predict)
 import(methods)
 importClassesFrom(Matrix,dgCMatrix)
 importClassesFrom(Matrix,dgeMatrix)
-importFrom(DiagrammeR,create_edges)
-importFrom(DiagrammeR,create_graph)
-importFrom(DiagrammeR,create_nodes)
-importFrom(DiagrammeR,render_graph)
 importFrom(Matrix,cBind)
 importFrom(Matrix,colSums)
 importFrom(Matrix,sparseVector)
diff --git a/R-package/R/xgb.plot.tree.R b/R-package/R/xgb.plot.tree.R
index 9977748db..475be7231 100644
--- a/R-package/R/xgb.plot.tree.R
+++ b/R-package/R/xgb.plot.tree.R
@@ -9,10 +9,6 @@
 #' @importFrom data.table :=
 #' @importFrom data.table copy
 #' @importFrom magrittr %>%
-#' @importFrom DiagrammeR create_nodes
-#' @importFrom DiagrammeR create_edges
-#' @importFrom DiagrammeR create_graph
-#' @importFrom DiagrammeR render_graph
 #' @param feature_names names of each feature as a character vector. Can be extracted from a sparse matrix (see example). If model dump already contains feature names, this argument should be \code{NULL}.
 #' @param filename_dump the path to the text file storing the model. Model dump must include the gain per feature and per tree (parameter \code{with.stats = T} in function \code{xgb.dump}). Possible to provide a model directly (see \code{model} argument).
 #' @param model generated by the \code{xgb.train} function. Avoid the creation of a dump file.