diff --git a/test/Project.toml b/test/Project.toml
index 923a48ea2..271cf4f19 100644
--- a/test/Project.toml
+++ b/test/Project.toml
@@ -42,7 +42,7 @@ Distributions = "0.25"
 DistributionsAD = "0.6.3"
 Documenter = "1"
 EnzymeCore = "0.6 - 0.8"
-ForwardDiff = "0.10.12"
+ForwardDiff = "0.10.12, 1"
 JET = "0.9, 0.10"
 LogDensityProblems = "2"
 MCMCChains = "6.0.4, 7"