diff --git a/docs/Project.toml b/docs/Project.toml
index 267c1e441..eb49ea71e 100644
--- a/docs/Project.toml
+++ b/docs/Project.toml
@@ -20,7 +20,7 @@ Bijectors = "0.13.6, 0.14, 0.15"
 Distributions = "0.25"
 Documenter = "1"
 FillArrays = "1"
-ForwardDiff = "0.10"
+ForwardDiff = "0.10, 1"
 LogDensityProblems = "2.1.1"
 Optimisers = "0.3, 0.4"
 Plots = "1"