diff --git a/Project.toml b/Project.toml
index 3479ddb..fa803d6 100644
--- a/Project.toml
+++ b/Project.toml
@@ -1,13 +1,19 @@
 name = "SteamTables"
 uuid = "43dc94dd-f011-5c5d-8ab2-5073432dc0ba"
-version = "1.0.0"
 author = ["Braam van Dyk <braam.vandyk@gmail.com>"]
+version = "1.0.0"
 
 [deps]
 Roots = "f2b01f46-fcfa-551c-844a-d8ac1e96c665"
 Unitful = "1986cc42-f94f-5a68-af5c-568840ba703d"
 
 [compat]
-julia = "≥1.0"
 Roots = "≥0.6.0"
 Unitful = "≥0.15.0"
+julia = "≥1.0"
+
+[extras]
+Test = "8dfed614-e22c-5e08-85e1-65c5234f0b40"
+
+[targets]
+test = ["Test"]