diff --git a/test/Project.toml b/test/Project.toml
index be92339..c5edae5 100644
--- a/test/Project.toml
+++ b/test/Project.toml
@@ -15,6 +15,7 @@ Test = "8dfed614-e22c-5e08-85e1-65c5234f0b40"
 [compat]
 AbstractMCMC = "2, 3, 4, 5"
 Distributions = "0.24, 0.25"
+GaussianDistributions = "0.5"
 Kalman = "0.1"
 HypothesisTests = "0.11"
 DynamicIterators = "0.4"