diff --git a/DESCRIPTION b/DESCRIPTION
index 979fabc..4178501 100644
--- a/DESCRIPTION
+++ b/DESCRIPTION
@@ -21,6 +21,7 @@ Imports:
     parallel,
     processx,
     redux,
+    R6,
     uuid
 Suggests:
     callr,
diff --git a/NAMESPACE b/NAMESPACE
index 479e082..c241c2e 100644
--- a/NAMESPACE
+++ b/NAMESPACE
@@ -23,6 +23,7 @@ import(checkmate)
 import(data.table)
 import(mlr3misc)
 import(redux)
+importFrom(R6,R6Class)
 importFrom(jsonlite,fromJSON)
 importFrom(parallel,nextRNGStream)
 importFrom(parallel,nextRNGSubStream)
diff --git a/R/zzz.R b/R/zzz.R
index 79072aa..6a751a0 100644
--- a/R/zzz.R
+++ b/R/zzz.R
@@ -2,6 +2,7 @@
 #' @import redux
 #' @import mlr3misc
 #' @import checkmate
+#' @importFrom R6 R6Class
 #' @importFrom processx process
 #' @importFrom uuid UUIDgenerate
 #' @importFrom utils str