diff --git a/saphyr/Cargo.toml b/saphyr/Cargo.toml
index 1e63db6..651a11f 100644
--- a/saphyr/Cargo.toml
+++ b/saphyr/Cargo.toml
@@ -7,6 +7,7 @@ documentation = "http://chyh1990.github.io/yaml-rust/doc/yaml_rust/"
 license = "MIT/Apache-2.0"
 description = "The missing YAML 1.2 parser for rust"
 repository = "https://github.com/chyh1990/yaml-rust"
+publish = false # this branch contains breaking changes
 
 [dependencies]
 clippy = { version = "^0.*", optional = true }