diff --git a/Project.toml b/Project.toml
index cbbf648..1f011cb 100644
--- a/Project.toml
+++ b/Project.toml
@@ -14,10 +14,10 @@ Test = "8dfed614-e22c-5e08-85e1-65c5234f0b40"
 [compat]
 julia = "1.2"
 CSV = "0.5.18"
-DataFrames = "0.19.4"
+DataFrames = "0.19,0.20"
 DataStructures = "0.17.5"
 JSON = "0.21"
-PrettyTables = "≥ 0.6"
+PrettyTables = "0.6,0.7,0.8"
 
 [extras]
 Test = "8dfed614-e22c-5e08-85e1-65c5234f0b40"