diff --git a/Project.toml b/Project.toml
index 9d3aff4..481b18f 100644
--- a/Project.toml
+++ b/Project.toml
@@ -16,6 +16,7 @@ Unitful = "1986cc42-f94f-5a68-af5c-568840ba703d"
 
 [compat]
 ArrayTools = "0.3"
+FITSHeaders = "0.4"
 TypeUtils = "1"
 julia = "1.5"