diff --git a/Project.toml b/Project.toml
index fe56bbc5..9df77238 100644
--- a/Project.toml
+++ b/Project.toml
@@ -36,7 +36,7 @@ CUDA = "5"
 CellArrays = "0.2, 0.3"
 GeoParams = "0.6.7"
 HDF5 = "0.17.1"
-ImplicitGlobalGrid = "0.15"
+ImplicitGlobalGrid = "0.15, 0.16"
 JLD2 = "0.4, 0.5"
 JustPIC = "0.5.3"
 MPI = "0.20"