diff --git a/docs/Project.toml b/docs/Project.toml
index a5ac1fa..7fe5a9e 100644
--- a/docs/Project.toml
+++ b/docs/Project.toml
@@ -2,3 +2,6 @@
 Chairmarks = "0ca39b1e-fe0b-4e98-acfc-b1656634c4de"
 Documenter = "e30172f5-a6a5-5a46-863b-614d45cd2de4"
 SpaceDataModel = "0b37b92c-f0c5-4a52-bd5c-390dec20857c"
+
+[compat]
+Chairmarks = "1.3.1"
diff --git a/test/Project.toml b/test/Project.toml
index b6b35f0..bb4af2b 100644
--- a/test/Project.toml
+++ b/test/Project.toml
@@ -11,3 +11,6 @@ Test = "8dfed614-e22c-5e08-85e1-65c5234f0b40"
 TestItemRunner = "f8b46487-2199-4994-9208-9a1283c18c0a"
 TestItems = "1c621080-faea-4a02-84b6-bbd5e436b8fe"
 Unitful = "1986cc42-f94f-5a68-af5c-568840ba703d"
+
+[compat]
+Chairmarks = "1.3.1"