diff --git a/test/Project.toml b/test/Project.toml
index ade5ade1a..ed8ae7971 100644
--- a/test/Project.toml
+++ b/test/Project.toml
@@ -28,7 +28,7 @@ Bijectors = "0.13"
 Compat = "4.3.0"
 Distributions = "0.25"
 DistributionsAD = "0.6.3"
-Documenter = "0.26.1, 0.27"
+Documenter = "0.26.1, 0.27, 1"
 ForwardDiff = "0.10.12"
 LogDensityProblems = "2"
 MCMCChains = "4.0.4, 5, 6"