diff --git a/src/ctap/hid/mod.rs b/src/ctap/hid/mod.rs
index 115bc3a..addc09c 100644
--- a/src/ctap/hid/mod.rs
+++ b/src/ctap/hid/mod.rs
@@ -163,7 +163,6 @@ impl CtapHid {
             Ok(Some(message)) => {
                 #[cfg(feature = "debug_ctap")]
                 writeln!(&mut Console::new(), "Received message: {:02x?}", message).unwrap();
-
                 let cid = message.cid;
                 if !self.has_valid_channel(&message) {
                     #[cfg(feature = "debug_ctap")]
diff --git a/src/ctap/storage.rs b/src/ctap/storage.rs
index de5eb03..a4dcaf2 100644
--- a/src/ctap/storage.rs
+++ b/src/ctap/storage.rs
@@ -11,7 +11,6 @@
 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 // See the License for the specific language governing permissions and
 // limitations under the License.
-
 #[cfg(feature = "with_ctap2_1")]
 use crate::ctap::data_formats::{extract_array, extract_text_string};
 use crate::ctap::data_formats::{CredentialProtectionPolicy, PublicKeyCredentialSource};
diff --git a/src/lib.rs b/src/lib.rs
index 0df6552..fe7bd4c 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -23,6 +23,10 @@ extern crate cbor;
 extern crate lang_items;
 extern crate libtock_core;
 extern crate libtock_drivers;
+#[macro_use]
+extern crate cbor;
+#[macro_use]
+extern crate arrayref;
 
 pub mod ctap;
 pub mod embedded_flash;