diff --git a/Cargo.toml b/Cargo.toml
index 909a4d3..4a6a505 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -13,6 +13,6 @@ description = "mdBook preprocessor for removing yml header"
 [dependencies]
 clap = "3.*"
 lazy_static = "1.*"
-mdbook = "0.4.*"
+mdbook = { version = "0.4.*", default-features = false }
 regex = "1.*"
 serde_json = "1.*"