diff --git a/Cargo.toml b/Cargo.toml
index 0285ad7..c4eacd4 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -2,6 +2,7 @@
 name = "humansize"
 version = "1.1.1"
 authors = ["Leopold Arkham <leopold.arkham@gmail.com>"]
+edition = "2018"
 
 description = "A configurable crate to easily represent file sizes in a human-readable format."
 
diff --git a/src/file_size_opts/defaults.rs b/src/file_size_opts/defaults.rs
index 925f7f6..9d212ed 100644
--- a/src/file_size_opts/defaults.rs
+++ b/src/file_size_opts/defaults.rs
@@ -1,4 +1,4 @@
-use file_size_opts::{
+use crate::file_size_opts::{
   FileSizeOpts,
   Kilo,
   FixedAt,
diff --git a/src/lib.rs b/src/lib.rs
index fe25f2c..7c8076b 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -15,7 +15,6 @@
 //! provided by the options module.
 //!
 //! ```rust
-//! extern crate humansize;
 //! use humansize::{FileSize, file_size_opts as options};
 //!
 //! fn main() {
diff --git a/tests/test.rs b/tests/test.rs
index e58de23..42911f0 100644
--- a/tests/test.rs
+++ b/tests/test.rs
@@ -1,5 +1,6 @@
-use humansize::{file_size_opts, FileSize};
+use humansize::{file_size_opts::{self, BINARY, DECIMAL, CONVENTIONAL}, FileSize};
 
+#[test]
 fn test_sizes() {
 
     assert_eq!(0.file_size(BINARY).unwrap(), "0 B");