diff --git a/DESCRIPTION b/DESCRIPTION
index d38d50b..a2b507a 100644
--- a/DESCRIPTION
+++ b/DESCRIPTION
@@ -54,7 +54,8 @@ Imports:
     lme4 (>= 1.1-35.1),
     tibble,
     ggrepel,
-    pbkrtest
+    pbkrtest,
+    ppcor
 Suggests: 
     covr,
     devtools,