diff --git a/Project.toml b/Project.toml
index 32c0e95..48ba213 100644
--- a/Project.toml
+++ b/Project.toml
@@ -15,4 +15,5 @@ DataFrames = "0.21, 0.22, 1"
 FITSIO = "0.16, 0.17"
 LazyStack = "0.0.7"
 ResumableFunctions = "0.5.1, 0.6"
+Statistics = "1"
 julia = "1.3"