diff --git a/test/Project.toml b/test/Project.toml
index 36b7ebdec..20d42ea87 100644
--- a/test/Project.toml
+++ b/test/Project.toml
@@ -54,7 +54,7 @@ DistributionsAD = "0.6.3"
 DynamicHMC = "2.1.6, 3.0"
 DynamicPPL = "0.35"
 FiniteDifferences = "0.10.8, 0.11, 0.12"
-ForwardDiff = "0.10.12 - 0.10.32, 0.10"
+ForwardDiff = "0.10.12 - 0.10.32, 0.10, 1"
 HypothesisTests = "0.11"
 LinearAlgebra = "1"
 LogDensityProblems = "2"