diff --git a/Project.toml b/Project.toml
index ce3f784d..974e2163 100644
--- a/Project.toml
+++ b/Project.toml
@@ -25,6 +25,7 @@ Downloads = "1.6"
 JLD2 = "0.4"
 KernelAbstractions = "0.9"
 NCDatasets = "0.12, 0.13"
+Oceananigans = "0.90"
 SeawaterPolynomials = "0.3"
 Statistics = "1.9"
 julia = "1.9"