diff --git a/R/DESCRIPTION b/R/DESCRIPTION
index 80fb7c2..3b829a5 100644
--- a/R/DESCRIPTION
+++ b/R/DESCRIPTION
@@ -22,7 +22,7 @@ Imports:
     rstan (>= 2.14.0),
     scales,
     stats,
-    tidyr,
+    tidyr (>= 0.6.1),
     utils,
     zoo
 Suggests: