diff --git a/Project.toml b/Project.toml
index 4f3d4e1..757c504 100644
--- a/Project.toml
+++ b/Project.toml
@@ -12,4 +12,11 @@ StructC14N = "d2514e9c-36c4-5b8e-97e2-51e7675c221c"
 Test = "8dfed614-e22c-5e08-85e1-65c5234f0b40"
 
 [compat]
-julia = "≥ 1.2.0"
+julia = "^1.2"
+ColorSchemes = "^3.5"
+ColorTypes = "^0.10"
+Colors = "^0.12"
+DataStructures = "^0.17"
+StatsBase = "^0.33"
+StructC14N = "^0.3"
+