diff --git a/Project.toml b/Project.toml
index 28c2e12e..1f7ae8c8 100644
--- a/Project.toml
+++ b/Project.toml
@@ -70,7 +70,7 @@ HDF5 = "0.12, 0.13, 0.14, 0.15"
 JLD2 = "^0.1.3, 0.2, 0.3"
 MAT = "0.6, 0.7, 0.8, 0.9, 0.10"
 MbedTLS = "^0.6.8, 0.7, 1.0"
-Missings = "0.4"
+Missings = "0.4, 1.2"
 ModelConstructors = "^0.2.4"
 Nullables = "^0.0.8, 1"
 Optim = "0.16, 0.17, 0.18, 0.19, 0.20, 0.21, 0.22, ^1.2.1"