diff --git a/Cargo.toml b/Cargo.toml
index dff93da4..77a958de 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -10,6 +10,7 @@ keywords = ["zip", "archive"]
 description = """
 Library to support the reading and writing of zip files.
 """
+edition = "2018"
 
 [dependencies]
 flate2 = { version = "1.0", default-features = false, optional = true }
diff --git a/benches/read_entry.rs b/benches/read_entry.rs
index 104e97c1..7b345240 100644
--- a/benches/read_entry.rs
+++ b/benches/read_entry.rs
@@ -1,7 +1,4 @@
-#[macro_use]
-extern crate bencher;
-extern crate rand;
-extern crate zip;
+use bencher::{benchmark_group, benchmark_main};
 
 use std::io::{Cursor, Read, Write};
 
diff --git a/examples/extract.rs b/examples/extract.rs
index 3d3a0939..1ec429d3 100644
--- a/examples/extract.rs
+++ b/examples/extract.rs
@@ -1,5 +1,3 @@
-extern crate zip;
-
 use std::io;
 use std::fs;
 
diff --git a/examples/extract_lorem.rs b/examples/extract_lorem.rs
index eb49bbe3..207fd530 100644
--- a/examples/extract_lorem.rs
+++ b/examples/extract_lorem.rs
@@ -1,7 +1,5 @@
 use std::io::prelude::*;
 
-extern crate zip;
-
 fn main()
 {
     std::process::exit(real_main());
diff --git a/examples/file_info.rs b/examples/file_info.rs
index 63f7d87e..af7abdd4 100644
--- a/examples/file_info.rs
+++ b/examples/file_info.rs
@@ -1,5 +1,3 @@
-extern crate zip;
-
 use std::fs;
 use std::io::BufReader;
 
diff --git a/examples/stdin_info.rs b/examples/stdin_info.rs
index 910ba8e8..8d3f7c43 100644
--- a/examples/stdin_info.rs
+++ b/examples/stdin_info.rs
@@ -1,5 +1,3 @@
-extern crate zip;
-
 use std::io::{self, Read};
 
 fn main() {
diff --git a/examples/write_dir.rs b/examples/write_dir.rs
index fb36ccaf..6b2bac0a 100644
--- a/examples/write_dir.rs
+++ b/examples/write_dir.rs
@@ -1,5 +1,3 @@
-extern crate zip;
-extern crate walkdir;
 
 use std::io::prelude::*;
 use std::io::{Write, Seek};
@@ -48,7 +46,7 @@ fn real_main() -> i32 {
     return 0;
 }
 
-fn zip_dir<T>(it: &mut Iterator<Item=DirEntry>, prefix: &str, writer: T, method: zip::CompressionMethod)
+fn zip_dir<T>(it: &mut dyn Iterator<Item=DirEntry>, prefix: &str, writer: T, method: zip::CompressionMethod)
               -> zip::result::ZipResult<()>
     where T: Write+Seek
 {
diff --git a/examples/write_sample.rs b/examples/write_sample.rs
index 6ff12f0b..ab0ef1a2 100644
--- a/examples/write_sample.rs
+++ b/examples/write_sample.rs
@@ -1,8 +1,6 @@
 use std::io::prelude::*;
 use zip::write::FileOptions;
 
-extern crate zip;
-
 fn main()
 {
     std::process::exit(real_main());
diff --git a/src/compression.rs b/src/compression.rs
index 9585ef3b..3ec9dbf3 100644
--- a/src/compression.rs
+++ b/src/compression.rs
@@ -45,7 +45,7 @@ impl CompressionMethod {
 }
 
 impl fmt::Display for CompressionMethod {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         // Just duplicate what the Debug format looks like, i.e, the enum key:
         write!(f, "{:?}", self)
     }
diff --git a/src/cp437.rs b/src/cp437.rs
index 69547219..a1ef6d27 100644
--- a/src/cp437.rs
+++ b/src/cp437.rs
@@ -41,7 +41,7 @@ fn to_char(input: u8) -> char
 {
     let output = match input
     {
-        0x00 ... 0x7f => input as u32,
+        0x00 ..= 0x7f => input as u32,
         0x80 => 0x00c7,
         0x81 => 0x00fc,
         0x82 => 0x00e9,
diff --git a/src/lib.rs b/src/lib.rs
index cfe4a598..4685e18a 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -2,19 +2,10 @@
 
 #![warn(missing_docs)]
 
-#[cfg(feature = "bzip2")]
-extern crate bzip2;
-extern crate crc32fast;
-#[cfg(feature = "deflate")]
-extern crate flate2;
-extern crate podio;
-#[cfg(feature = "time")]
-extern crate time;
-
-pub use read::ZipArchive;
-pub use write::ZipWriter;
-pub use compression::CompressionMethod;
-pub use types::DateTime;
+pub use crate::read::ZipArchive;
+pub use crate::write::ZipWriter;
+pub use crate::compression::CompressionMethod;
+pub use crate::types::DateTime;
 
 mod spec;
 mod crc32;
diff --git a/src/read.rs b/src/read.rs
index 2eb3d83b..9b4bad43 100644
--- a/src/read.rs
+++ b/src/read.rs
@@ -1,20 +1,18 @@
 //! Structs for reading a ZIP archive
 
-use crc32::Crc32Reader;
-use compression::CompressionMethod;
-use spec;
-use result::{ZipResult, ZipError};
+use crate::crc32::Crc32Reader;
+use crate::compression::CompressionMethod;
+use crate::spec;
+use crate::result::{ZipResult, ZipError};
 use std::io;
 use std::io::prelude::*;
 use std::collections::HashMap;
 use std::borrow::Cow;
 
 use podio::{ReadPodExt, LittleEndian};
-use types::{ZipFileData, System, DateTime};
-use cp437::FromCp437;
+use crate::types::{ZipFileData, System, DateTime};
+use crate::cp437::FromCp437;
 
-#[cfg(feature = "deflate")]
-use flate2;
 #[cfg(feature = "deflate")]
 use flate2::read::DeflateDecoder;
 
@@ -64,11 +62,11 @@ pub struct ZipArchive<R: Read + io::Seek>
 
 enum ZipFileReader<'a> {
     NoReader,
-    Stored(Crc32Reader<io::Take<&'a mut Read>>),
+    Stored(Crc32Reader<io::Take<&'a mut dyn Read>>),
     #[cfg(feature = "deflate")]
-    Deflated(Crc32Reader<flate2::read::DeflateDecoder<io::Take<&'a mut Read>>>),
+    Deflated(Crc32Reader<flate2::read::DeflateDecoder<io::Take<&'a mut dyn Read>>>),
     #[cfg(feature = "bzip2")]
-    Bzip2(Crc32Reader<BzDecoder<io::Take<&'a mut Read>>>),
+    Bzip2(Crc32Reader<BzDecoder<io::Take<&'a mut dyn Read>>>),
 }
 
 /// A struct for reading a zip file
@@ -84,9 +82,9 @@ fn unsupported_zip_error<T>(detail: &'static str) -> ZipResult<T>
 
 
 fn make_reader<'a>(
-    compression_method: ::compression::CompressionMethod,
+    compression_method: crate::compression::CompressionMethod,
     crc32: u32,
-    reader: io::Take<&'a mut io::Read>)
+    reader: io::Take<&'a mut dyn io::Read>)
         -> ZipResult<ZipFileReader<'a>> {
 
     match compression_method {
@@ -289,7 +287,7 @@ impl<R: Read+io::Seek> ZipArchive<R>
         data.data_start = data.header_start + magic_and_header + file_name_length + extra_field_length;
 
         self.reader.seek(io::SeekFrom::Start(data.data_start))?;
-        let limit_reader = (self.reader.by_ref() as &mut Read).take(data.compressed_size);
+        let limit_reader = (self.reader.by_ref() as &mut dyn Read).take(data.compressed_size);
 
         Ok(ZipFile { reader: make_reader(data.compression_method, data.crc32, limit_reader)?, data: Cow::Borrowed(data) })
     }
@@ -414,20 +412,20 @@ fn parse_extra_field(file: &mut ZipFileData, data: &[u8]) -> ZipResult<()>
     Ok(())
 }
 
-fn get_reader<'a>(reader: &'a mut ZipFileReader) -> &'a mut Read {
+fn get_reader<'a>(reader: &'a mut ZipFileReader<'_>) -> &'a mut dyn Read {
     match *reader {
         ZipFileReader::NoReader => panic!("ZipFileReader was in an invalid state"),
-        ZipFileReader::Stored(ref mut r) => r as &mut Read,
+        ZipFileReader::Stored(ref mut r) => r as &mut dyn Read,
         #[cfg(feature = "deflate")]
-        ZipFileReader::Deflated(ref mut r) => r as &mut Read,
+        ZipFileReader::Deflated(ref mut r) => r as &mut dyn Read,
         #[cfg(feature = "bzip2")]
-        ZipFileReader::Bzip2(ref mut r) => r as &mut Read,
+        ZipFileReader::Bzip2(ref mut r) => r as &mut dyn Read,
     }
 }
 
 /// Methods for retrieving information on zip files
 impl<'a> ZipFile<'a> {
-    fn get_reader(&mut self) -> &mut Read {
+    fn get_reader(&mut self) -> &mut dyn Read {
         get_reader(&mut self.reader)
     }
     /// Get the version of the file
@@ -563,7 +561,7 @@ impl<'a> Drop for ZipFile<'a> {
 /// * `comment`: set to an empty string
 /// * `data_start`: set to 0
 /// * `external_attributes`: `unix_mode()`: will return None
-pub fn read_zipfile_from_stream<'a, R: io::Read>(reader: &'a mut R) -> ZipResult<Option<ZipFile>> {
+pub fn read_zipfile_from_stream<'a, R: io::Read>(reader: &'a mut R) -> ZipResult<Option<ZipFile<'_>>> {
     let signature = reader.read_u32::<LittleEndian>()?;
 
     match signature {
@@ -630,7 +628,7 @@ pub fn read_zipfile_from_stream<'a, R: io::Read>(reader: &'a mut R) -> ZipResult
         return unsupported_zip_error("The file length is not available in the local header");
     }
 
-    let limit_reader = (reader as &'a mut io::Read).take(result.compressed_size as u64);
+    let limit_reader = (reader as &'a mut dyn io::Read).take(result.compressed_size as u64);
 
     let result_crc32 = result.crc32;
     let result_compression_method = result.compression_method;
diff --git a/src/result.rs b/src/result.rs
index d82259ea..c826d1d4 100644
--- a/src/result.rs
+++ b/src/result.rs
@@ -27,14 +27,14 @@ pub enum ZipError
 
 impl ZipError
 {
-    fn detail(&self) -> ::std::borrow::Cow<str>
+    fn detail(&self) -> ::std::borrow::Cow<'_, str>
     {
         use std::error::Error;
 
         match *self
         {
             ZipError::Io(ref io_err) => {
-                ("Io Error: ".to_string() + (io_err as &error::Error).description()).into()
+                ("Io Error: ".to_string() + (io_err as &dyn error::Error).description()).into()
             },
             ZipError::InvalidArchive(msg) | ZipError::UnsupportedArchive(msg) => {
                 (self.description().to_string() + ": " + msg).into()
@@ -64,7 +64,7 @@ impl convert::From<ZipError> for io::Error
 
 impl fmt::Display for ZipError
 {
-    fn fmt(&self, fmt: &mut fmt::Formatter) -> Result<(), fmt::Error>
+    fn fmt(&self, fmt: &mut fmt::Formatter<'_>) -> Result<(), fmt::Error>
     {
         fmt.write_str(&*self.detail())
     }
@@ -76,18 +76,18 @@ impl error::Error for ZipError
     {
         match *self
         {
-            ZipError::Io(ref io_err) => (io_err as &error::Error).description(),
+            ZipError::Io(ref io_err) => (io_err as &dyn error::Error).description(),
             ZipError::InvalidArchive(..) => "Invalid Zip archive",
             ZipError::UnsupportedArchive(..) => "Unsupported Zip archive",
             ZipError::FileNotFound => "Specified file not found in archive",
         }
     }
 
-    fn cause(&self) -> Option<&error::Error>
+    fn cause(&self) -> Option<&dyn error::Error>
     {
         match *self
         {
-            ZipError::Io(ref io_err) => Some(io_err as &error::Error),
+            ZipError::Io(ref io_err) => Some(io_err as &dyn error::Error),
             _ => None,
         }
     }
diff --git a/src/spec.rs b/src/spec.rs
index 9da07caa..8a165391 100644
--- a/src/spec.rs
+++ b/src/spec.rs
@@ -1,6 +1,6 @@
 use std::io;
 use std::io::prelude::*;
-use result::{ZipResult, ZipError};
+use crate::result::{ZipResult, ZipError};
 use podio::{ReadPodExt, WritePodExt, LittleEndian};
 
 pub const LOCAL_FILE_HEADER_SIGNATURE : u32 = 0x04034b50;
diff --git a/src/types.rs b/src/types.rs
index e0ed8006..640e0c52 100644
--- a/src/types.rs
+++ b/src/types.rs
@@ -202,7 +202,7 @@ pub struct ZipFileData
     /// True if the file is encrypted.
     pub encrypted: bool,
     /// Compression method used to store the file
-    pub compression_method: ::compression::CompressionMethod,
+    pub compression_method: crate::compression::CompressionMethod,
     /// Last modified time. This will only have a 2 second precision.
     pub last_modified_time: DateTime,
     /// CRC32 checksum
@@ -258,7 +258,7 @@ impl ZipFileData {
     pub fn version_needed(&self) -> u16 {
         match self.compression_method {
             #[cfg(feature = "bzip2")]
-            ::compression::CompressionMethod::Bzip2 => 46,
+            crate::compression::CompressionMethod::Bzip2 => 46,
             _ => 20,
         }
     }
@@ -283,7 +283,7 @@ mod test {
             system: System::Dos,
             version_made_by: 0,
             encrypted: false,
-            compression_method: ::compression::CompressionMethod::Stored,
+            compression_method: crate::compression::CompressionMethod::Stored,
             last_modified_time: DateTime::default(),
             crc32: 0,
             compressed_size: 0,
diff --git a/src/write.rs b/src/write.rs
index 5e4c223f..da3a4aae 100644
--- a/src/write.rs
+++ b/src/write.rs
@@ -1,25 +1,19 @@
 //! Structs for creating a new zip archive
 
-use compression::CompressionMethod;
-use types::{ZipFileData, System, DEFAULT_VERSION, DateTime};
-use spec;
+use crate::compression::CompressionMethod;
+use crate::types::{ZipFileData, System, DEFAULT_VERSION, DateTime};
+use crate::spec;
 use crc32fast::Hasher;
-use result::{ZipResult, ZipError};
+use crate::result::{ZipResult, ZipError};
 use std::default::Default;
 use std::io;
 use std::io::prelude::*;
 use std::mem;
-#[cfg(feature = "time")]
-use time;
 use podio::{WritePodExt, LittleEndian};
 
-#[cfg(feature = "deflate")]
-use flate2;
 #[cfg(feature = "deflate")]
 use flate2::write::DeflateEncoder;
 
-#[cfg(feature = "bzip2")]
-use bzip2;
 #[cfg(feature = "bzip2")]
 use bzip2::write::BzEncoder;
 
@@ -395,13 +389,13 @@ impl<W: Write+io::Seek> GenericZipWriter<W>
         Ok(())
     }
 
-    fn ref_mut(&mut self) -> Option<&mut Write> {
+    fn ref_mut(&mut self) -> Option<&mut dyn Write> {
         match *self {
-            GenericZipWriter::Storer(ref mut w) => Some(w as &mut Write),
+            GenericZipWriter::Storer(ref mut w) => Some(w as &mut dyn Write),
             #[cfg(feature = "deflate")]
-            GenericZipWriter::Deflater(ref mut w) => Some(w as &mut Write),
+            GenericZipWriter::Deflater(ref mut w) => Some(w as &mut dyn Write),
             #[cfg(feature = "bzip2")]
-            GenericZipWriter::Bzip2(ref mut w) => Some(w as &mut Write),
+            GenericZipWriter::Bzip2(ref mut w) => Some(w as &mut dyn Write),
             GenericZipWriter::Closed => None,
         }
     }
@@ -563,9 +557,9 @@ fn path_to_string(path: &std::path::Path) -> String {
 mod test {
     use std::io;
     use std::io::Write;
-    use types::DateTime;
+    use crate::types::DateTime;
     use super::{FileOptions, ZipWriter};
-    use compression::CompressionMethod;
+    use crate::compression::CompressionMethod;
 
     #[test]
     fn write_empty_zip() {
diff --git a/tests/end_to_end.rs b/tests/end_to_end.rs
index cd69ce3c..6af89ced 100644
--- a/tests/end_to_end.rs
+++ b/tests/end_to_end.rs
@@ -1,5 +1,3 @@
-extern crate zip;
-
 use std::io::prelude::*;
 use zip::write::FileOptions;
 use std::io::Cursor;
diff --git a/tests/invalid_date.rs b/tests/invalid_date.rs
index e5c24200..b245d2c0 100644
--- a/tests/invalid_date.rs
+++ b/tests/invalid_date.rs
@@ -1,5 +1,3 @@
-extern crate zip;
-
 use zip::read::ZipArchive;
 use std::io::Cursor;
 
diff --git a/tests/zip64_large.rs b/tests/zip64_large.rs
index d10c91e8..f537edc1 100644
--- a/tests/zip64_large.rs
+++ b/tests/zip64_large.rs
@@ -53,9 +53,6 @@
 // 22c400260  00 00 50 4b 05 06 00 00  00 00 03 00 03 00 27 01  |..PK..........'.|
 // 22c400270  00 00 ff ff ff ff 00 00                           |........|
 // 22c400278
-
-extern crate zip;
-
 use std::io::{self, Seek, SeekFrom, Read};
 
 const BLOCK1_LENGTH : u64 = 0x60;
@@ -167,16 +164,16 @@ impl Read for Zip64File {
             return Ok(0);
         }
         match self.pointer {
-            BLOCK1_START ... BLOCK1_END => {
+            BLOCK1_START ..= BLOCK1_END => {
                 buf[0] = BLOCK1[(self.pointer - BLOCK1_START) as usize];
             },
-            BLOCK2_START ... BLOCK2_END => {
+            BLOCK2_START ..= BLOCK2_END => {
                 buf[0] = BLOCK2[(self.pointer - BLOCK2_START) as usize];
             },
-            BLOCK3_START ... BLOCK3_END => {
+            BLOCK3_START ..= BLOCK3_END => {
                 buf[0] = BLOCK3[(self.pointer - BLOCK3_START) as usize];
             },
-            BLOCK4_START ... BLOCK4_END => {
+            BLOCK4_START ..= BLOCK4_END => {
                 buf[0] = BLOCK4[(self.pointer - BLOCK4_START) as usize];
             },
             _ => {