diff --git a/device/Cargo.toml b/device/Cargo.toml
index 1a570877..369bd996 100644
--- a/device/Cargo.toml
+++ b/device/Cargo.toml
@@ -21,7 +21,7 @@ cfg-if = "1.0.0"
 cameleon-impl = { path = "../impl", version = "0.1.12" }
 
 rusb = { version = "0.9.0", optional = true }
-libusb1-sys = { version = "0.6.0", optional = true }
+libusb1-sys = { version = "0.7.0", optional = true }
 libc = { version = "0.2", optional = true }
 
 [dev-dependencies]
diff --git a/device/src/u3v/device_builder.rs b/device/src/u3v/device_builder.rs
index 8e6bc974..dac13ca9 100644
--- a/device/src/u3v/device_builder.rs
+++ b/device/src/u3v/device_builder.rs
@@ -61,7 +61,7 @@ impl DeviceBuilder {
 
     fn build(self) -> Result<Device> {
         // TODO: Log it when device is broken or invalid.
-        let mut dev_channel = self.device.open()?;
+        let dev_channel = self.device.open()?;
         if dev_channel.active_configuration()? != self.config_desc.number() {
             dev_channel.set_active_configuration(self.config_desc.number())?;
         }