diff --git a/Project.toml b/Project.toml
index 4cf7079..c29e88b 100644
--- a/Project.toml
+++ b/Project.toml
@@ -38,7 +38,7 @@ FileIO = "1.0"
 ForwardDiff = "0.10"
 Infiltrator = "1.0"
 JLD2 = "0.4"
-MultiFloats = "1.0"
+MultiFloats = "1.0, 2.0"
 NCDatasets = "0.12, 0.13, 0.14"
 NLsolve = "4.5"
 PALEOboxes = "0.21.17"