diff --git a/src/main/rust/Cargo.toml b/src/main/rust/Cargo.toml
index e643055..ffa8c1d 100644
--- a/src/main/rust/Cargo.toml
+++ b/src/main/rust/Cargo.toml
@@ -17,6 +17,7 @@ libc = "0.2.155"
 
 [features]
 json = []
+unsafe = []
 
 [profile.release]
 lto = "fat"