diff --git a/Cargo.toml b/Cargo.toml
index cd983ca..d0b116c 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,8 +1,8 @@
 [package]
 name = "libfreemkv"
-version = "0.19.0"
+version = "0.19.1"
 edition = "2024"
-rust-version = "0.19.0"
+rust-version = "1.86"
 license = "AGPL-3.0-only"
 description = "Open source raw disc access library for optical drives"
 repository = "https://github.com/freemkv/libfreemkv"
@@ -10,7 +10,7 @@ keywords = ["bluray", "uhd", "optical", "scsi", "disc"]
 categories = ["hardware-support", "multimedia"]
 
 [dependencies]
-serde = { version = "0.19.0", features = ["derive"] }
+serde = { version = "1", features = ["derive"] }
 serde_json = "1"
 sha1 = "0.10"
 sha2 = "0.10"
@@ -22,7 +22,7 @@ num-traits = "0.2"
 num-integer = "0.1"
 rand = "0.8"
 cmac = "0.7"
-zip = { version = "0.19.0", default-features = false, features = ["deflate"] }
+zip = { version = "2", default-features = false, features = ["deflate"] }
 base64 = "0.22.1"
 # Trace-level instrumentation for Disc::copy + SgIoTransport::execute. Permitted
 # under CLAUDE.md ("Acceptable strings: debug/trace logging"). Consumers (autorip)
diff --git a/src/mux/disc.rs b/src/mux/disc.rs
index e2a2bcd..2d651f8 100644
--- a/src/mux/disc.rs
+++ b/src/mux/disc.rs
@@ -318,14 +318,13 @@ impl DiscStream {
         // on failure, advance on success. One 5s read attempt per try — no
         // retry loops, no sleeps. On size-1 failure, skip or error.
         //
-      // Halt is checked at the top of every iteration — in a dense bad zone
+        // Halt is checked at the top of every iteration — in a dense bad zone
         // this loop can spend minutes shrinking and skipping sectors; without
         // the check, Stop wouldn't take effect until the outer PES read() loop
         // finally emits a frame, which may never happen.
-        
-        let start_lba = lba;
+
         let start_time = std::time::Instant::now();
-        
+
         loop {
             if self.is_halted() {
                 return Err(crate::error::Error::Halted.into());