diff --git a/docs/Project.toml b/docs/Project.toml
index 79b107af..4b6db127 100644
--- a/docs/Project.toml
+++ b/docs/Project.toml
@@ -5,6 +5,7 @@ Documenter = "e30172f5-a6a5-5a46-863b-614d45cd2de4"
 MarkdownAST = "d0879d2d-cac2-40c8-9cee-1863dc0c7391"
 
 [compat]
+CTBase = "0.17"
 Coverage = "1"
 Documenter = "1"
 MarkdownAST = "0.1"