diff --git a/ld/Cargo.toml b/ld/Cargo.toml
index 5138793..c07b520 100644
--- a/ld/Cargo.toml
+++ b/ld/Cargo.toml
@@ -8,7 +8,7 @@ description = "LibreDrive unlocker plugin for libfreemkv (firmware unlock for Me
 repository = "https://github.com/freemkv/freemkv-unlock"
 
 [dependencies]
-libfreemkv = "1.0.0-rc.4.3"
+libfreemkv = "=1.0.0-rc.4.3"
 serde = { version = "1", features = ["derive"] }
 serde_json = "1"
 base64 = "0.22.1"
diff --git a/ld/src/cdb.rs b/ld/src/cdb.rs
index b57c17c..c1a7597 100644
--- a/ld/src/cdb.rs
+++ b/ld/src/cdb.rs
@@ -47,7 +47,7 @@ mod tests {
         assert!(!is_unlock_read_buffer(1, 0x77));
         assert!(!is_unlock_read_buffer(2, 0x44));
         // Wrong mode, right buffer id.
-        assert!(!is_unlock_read_buffer(2, 0x44));
+        assert!(!is_unlock_read_buffer(0, 0x77));
         assert!(!is_unlock_read_buffer(0, 0x44));
         assert!(!is_unlock_read_buffer(3, 0x77));
         // Ordinary data reads.