diff --git a/Project.toml b/Project.toml
index 5e9cf8b..cb1b90c 100644
--- a/Project.toml
+++ b/Project.toml
@@ -7,6 +7,10 @@ Base64 = "2a0f44e3-6c83-55bd-87e4-b1978d98bd5f"
 JSON = "682c06a0-de6a-54ab-a142-c8b1cf79cde6"
 REPL = "3fa0cd96-eef1-5676-8a61-b3b8758bbffb"
 
+[compat]
+JSON = "0.18, 0.19, 0.20"
+julia = "1"
+
 [extras]
 Test = "8dfed614-e22c-5e08-85e1-65c5234f0b40"