diff --git a/Project.toml b/Project.toml
index f331b7f..645d587 100644
--- a/Project.toml
+++ b/Project.toml
@@ -17,6 +17,7 @@ Unitful = "1986cc42-f94f-5a68-af5c-568840ba703d"
 [compat]
 ArrayTools = "0.3"
 EasyRanges = "0.1"
+FITSHeaders = "0.4"
 InterpolationKernels = "0.2"
 OffsetArrays = "1"
 TypeUtils = "1"