diff --git a/docs/Project.toml b/docs/Project.toml
index 17659122c..d7fdca824 100644
--- a/docs/Project.toml
+++ b/docs/Project.toml
@@ -42,6 +42,6 @@ ForwardDiff = "0.10, 1"
 LogDensityProblems = "2"
 MCMCChains = "5, 6, 7"
 MarginalLogDensities = "0.4"
-OrderedCollections = "1"
+OrderedCollections = "1, 2"
 StableRNGs = "1"
 StatsFuns = "1"