diff --git a/Project.toml b/Project.toml
index 1e8ba50..4bf594a 100644
--- a/Project.toml
+++ b/Project.toml
@@ -3,6 +3,9 @@ uuid = "0a941bbe-ad1d-11e8-39d9-ab76183a1d99"
 authors = ["Fabian Gans <fgans@bgc-jena.mpg.de>"]
 version = "0.2.0"
 
+[compat]
+julia = "1.1"
+
 [deps]
 AWSCore = "4f1ea46c-232b-54a6-9b17-cc2d0f3e6598"
 AWSS3 = "1c724243-ef5b-51ab-93f4-b0a88ac62a95"