diff --git a/src/main.rs b/src/main.rs
index 3dc003d..ad343e9 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -30,10 +30,10 @@ use std::sync::mpsc::{channel, Receiver};
 use std::thread::{spawn, JoinHandle};
 use argparse::{ArgumentParser, StoreTrue, Collect};
 
-use index::InMemoryIndex;
-use write::write_index_to_tmp_file;
-use merge::FileMerge;
-use tmp::TmpDir;
+use crate::index::InMemoryIndex;
+use crate::write::write_index_to_tmp_file;
+use crate::merge::FileMerge;
+use crate::tmp::TmpDir;
 
 /// Create an inverted index for the given list of `documents`,
 /// storing it in the specified `output_dir`.
diff --git a/src/merge.rs b/src/merge.rs
index 038dfc5..2a1adc7 100644
--- a/src/merge.rs
+++ b/src/merge.rs
@@ -3,9 +3,9 @@ use std::io::{self, BufWriter};
 use std::mem;
 use std::path::{Path, PathBuf};
 
-use tmp::TmpDir;
-use read::IndexFileReader;
-use write::IndexFileWriter;
+use crate::tmp::TmpDir;
+use crate::read::IndexFileReader;
+use crate::write::IndexFileWriter;
 
 pub struct FileMerge {
     output_dir: PathBuf,
diff --git a/src/read.rs b/src/read.rs
index 30f50df..460a797 100644
--- a/src/read.rs
+++ b/src/read.rs
@@ -6,7 +6,7 @@ use std::io::prelude::*;
 use std::io::{self, BufReader, SeekFrom};
 use std::path::Path;
 use byteorder::{LittleEndian, ReadBytesExt};
-use write::IndexFileWriter;
+use crate::write::IndexFileWriter;
 
 /// A `IndexFileReader` does a single linear pass over an index file from
 /// beginning to end. Needless to say, this is not how an index is normally
diff --git a/src/write.rs b/src/write.rs
index ee30c60..b42f384 100644
--- a/src/write.rs
+++ b/src/write.rs
@@ -2,8 +2,8 @@ use std::fs::File;
 use std::io::{self, BufWriter, SeekFrom};
 use std::io::prelude::*;
 use std::path::PathBuf;
-use index::InMemoryIndex;
-use tmp::TmpDir;
+use crate::index::InMemoryIndex;
+use crate::tmp::TmpDir;
 use byteorder::{LittleEndian, WriteBytesExt};
 
 /// Writer for saving an index to a binary file.