diff --git a/Project.toml b/Project.toml
index c85b82a6..7a5ab32e 100644
--- a/Project.toml
+++ b/Project.toml
@@ -44,7 +44,7 @@ FuzzyCompletions = "0.1, 0.2"
 HTTP = "^0.8"
 Hiccup = "^0.2.2"
 JSON = "^0.20, ^0.21"
-JuliaFormatter = "^0.4.3, ^0.5, 0.6, 0.7, 0.8"
+JuliaFormatter = "^0.4.3, ^0.5, 0.6, 0.7, 0.8, 0.9"
 JuliaInterpreter = "^0.8"
 Juno = "^0.7, ^0.8"
 LNR = "^0.2.0"