diff --git a/docs/Project.toml b/docs/Project.toml
index c48767cc5..9f3955d74 100644
--- a/docs/Project.toml
+++ b/docs/Project.toml
@@ -10,3 +10,6 @@ OpticSim = "24114763-4efb-45e7-af0e-cde916beb153"
 Plots = "91a5bcdd-55d7-5caf-9e0b-520d859cae80"
 StaticArrays = "90137ffa-7385-5640-81b9-e52037218182"
 Unitful = "1986cc42-f94f-5a68-af5c-568840ba703d"
+
+[compat]
+Documenter = "< 0.27"
diff --git a/docs/make.jl b/docs/make.jl
index 85b56cd0f..3a3db1067 100644
--- a/docs/make.jl
+++ b/docs/make.jl
@@ -40,7 +40,8 @@ makedocs(
         "Reference" => "ref.md",
         "Roadmap" => "roadmap.md"
     ],
-    expandfirst = ["glasscat.md", "systems.md", "vis.md"])
+    expandfirst = ["glasscat.md", "systems.md", "vis.md"]
+)
 
 deploydocs(
     repo = "github.com/microsoft/OpticSim.jl.git",