diff --git a/test/Project.toml b/test/Project.toml
index 66e15ee..db3c544 100644
--- a/test/Project.toml
+++ b/test/Project.toml
@@ -6,6 +6,7 @@ CategoricalArrays = "324d7699-5711-5eae-9e2f-1d82baa6b597"
 DataFrames = "a93c6f00-e57d-5684-b7b6-d8193f3e46c0"
 Mmap = "a63ad114-7e13-5084-954f-fe012c677804"
 Random = "9a3f8284-a2c9-5f02-9a11-845980a1fd5c"
+Serialization = "9e88b42a-f829-5b0c-bbe9-9e923198166b"
 SnpArrays = "4e780e97-f5bf-4111-9dc4-b70aaf691b06"
 StableRNGs = "860ef19b-820b-49d6-a774-d7a799459cd3"
 TMLE = "8afdd2fb-6e73-43df-8b62-b1650cd9c8cf"