diff --git a/docs/Project.toml b/docs/Project.toml
index d61994f..f663798 100644
--- a/docs/Project.toml
+++ b/docs/Project.toml
@@ -9,4 +9,4 @@ Statistics = "10745b16-79ce-11e8-11f9-7d13ad32a3b2"
 [compat]
 CairoMakie = "0.6 - 0.11"
 DataFrames = "1"
-Documenter = "1"
+Documenter = "1.3"