diff --git a/Project.toml b/Project.toml
index b64d83a..8b43829 100644
--- a/Project.toml
+++ b/Project.toml
@@ -2,7 +2,7 @@ name = "PowerSystemsUnits"
 uuid = "c279aad7-7dc9-58d3-995b-109d3f5deb94"
 license = "MIT"
 author = "Invenia Technical Computing"
-version = "0.2.0"
+version = "0.2.1"
 
 [deps]
 Dates = "ade2ca70-3891-5945-98fb-dc099432e06a"
@@ -10,7 +10,7 @@ Statistics = "10745b16-79ce-11e8-11f9-7d13ad32a3b2"
 Unitful = "1986cc42-f94f-5a68-af5c-568840ba703d"
 
 [compat]
-Unitful = "0.15, 1.6"
+Unitful = "0.15, ~1.6"
 julia = "~1.0.4, 1.1.1"
 
 [extras]