diff --git a/Project.toml b/Project.toml
index 28c2e12e..0ba335e8 100644
--- a/Project.toml
+++ b/Project.toml
@@ -57,7 +57,7 @@ CSV = "0.8"
 Calculus = "0.4, 0.5"
 ClusterManagers = "0.3.2, 0.4.0"
 ColorTypes = "0.7, 0.8, 0.9, 0.10"
-DataFrames = "0.17, 0.18, 0.19, 0.20, 0.21, 0.22"
+DataFrames = "0.17, 0.18, 0.19, 0.20, 0.21, 0.22, 1.6"
 DataStructures = "0.16, 0.17, 0.18"
 DifferentialEquations = "5, 6"
 Distributions = "0.18, 0.19, 0.20, 0.21, 0.22, 0.23, 0.24, 0.25"