diff --git a/R/zzz.R b/R/zzz.R
index 81f1596..efc9a1d 100644
--- a/R/zzz.R
+++ b/R/zzz.R
@@ -4,9 +4,11 @@
 #' @param pkg pkg
 #'
 #' @importFrom utils packageVersion
+#' @importFrom data.table setDTthreads
 #' @keywords internal
 .onAttach <- function(lib, pkg) {
   options(scipen = 6)
+  setDTthreads(0)
   # Check for new github release version. (Not master branch version, release version!)
   if (!interactive()) {
     return()