diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index ced1cb57..6f0e4b9d 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -39,6 +39,25 @@ jobs:
         command: test
         args: --all
 
+  clippy:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v2
+
+      - uses: actions-rs/toolchain@v1
+        with:
+          profile: minimal
+          toolchain: nightly
+          override: true
+          components: clippy
+
+      - name: clippy
+        uses: actions-rs/cargo@v1
+        with:
+          command: clippy
+          args: --all-targets --all-features -- -D warnings
+
   check_fmt_and_docs:
     name: Checking fmt and docs
     runs-on: ubuntu-latest
diff --git a/CODE_OF_CONDUCT.md b/CODE_OF_CONDUCT.md
index 845634eb..2290ec2b 100644
--- a/CODE_OF_CONDUCT.md
+++ b/CODE_OF_CONDUCT.md
@@ -1,4 +1,3 @@
-
 # Contributor Covenant Code of Conduct
 
 ## Our Pledge
diff --git a/examples/extract.rs b/examples/extract.rs
index 05c5a4aa..b02eb4cd 100644
--- a/examples/extract.rs
+++ b/examples/extract.rs
@@ -59,5 +59,6 @@ fn real_main() -> i32 {
             }
         }
     }
-    return 0;
+
+    0
 }
diff --git a/examples/extract_lorem.rs b/examples/extract_lorem.rs
index 89e33ef9..a34a04f4 100644
--- a/examples/extract_lorem.rs
+++ b/examples/extract_lorem.rs
@@ -27,5 +27,5 @@ fn real_main() -> i32 {
     file.read_to_string(&mut contents).unwrap();
     println!("{}", contents);
 
-    return 0;
+    0
 }
diff --git a/examples/file_info.rs b/examples/file_info.rs
index 315b5c38..824278df 100644
--- a/examples/file_info.rs
+++ b/examples/file_info.rs
@@ -49,5 +49,6 @@ fn real_main() -> i32 {
             );
         }
     }
-    return 0;
+
+    0
 }
diff --git a/examples/stdin_info.rs b/examples/stdin_info.rs
index 606944ce..10d7aa8b 100644
--- a/examples/stdin_info.rs
+++ b/examples/stdin_info.rs
@@ -30,5 +30,6 @@ fn real_main() -> i32 {
             }
         }
     }
-    return 0;
+
+    0
 }
diff --git a/examples/write_dir.rs b/examples/write_dir.rs
index 793bd6ba..ccb94cd2 100644
--- a/examples/write_dir.rs
+++ b/examples/write_dir.rs
@@ -54,7 +54,7 @@ fn real_main() -> i32 {
         }
     }
 
-    return 0;
+    0
 }
 
 fn zip_dir<T>(
@@ -87,7 +87,7 @@ where
             f.read_to_end(&mut buffer)?;
             zip.write_all(&*buffer)?;
             buffer.clear();
-        } else if name.as_os_str().len() != 0 {
+        } else if !name.as_os_str().is_empty() {
             // Only if not root! Avoids path spec / warning
             // and mapname conversion failed error on unzip
             println!("adding dir {:?} as {:?} ...", path, name);
@@ -111,7 +111,7 @@ fn doit(
     let path = Path::new(dst_file);
     let file = File::create(&path).unwrap();
 
-    let walkdir = WalkDir::new(src_dir.to_string());
+    let walkdir = WalkDir::new(src_dir);
     let it = walkdir.into_iter();
 
     zip_dir(&mut it.filter_map(|e| e.ok()), src_dir, file, method)?;
diff --git a/examples/write_sample.rs b/examples/write_sample.rs
index 4ef5ce34..b5749509 100644
--- a/examples/write_sample.rs
+++ b/examples/write_sample.rs
@@ -18,7 +18,7 @@ fn real_main() -> i32 {
         Err(e) => println!("Error: {:?}", e),
     }
 
-    return 0;
+    0
 }
 
 fn doit(filename: &str) -> zip::result::ZipResult<()> {
@@ -42,7 +42,7 @@ fn doit(filename: &str) -> zip::result::ZipResult<()> {
     Ok(())
 }
 
-const LOREM_IPSUM : &'static [u8] = b"Lorem ipsum dolor sit amet, consectetur adipiscing elit. In tellus elit, tristique vitae mattis egestas, ultricies vitae risus. Quisque sit amet quam ut urna aliquet
+const LOREM_IPSUM : &[u8] = b"Lorem ipsum dolor sit amet, consectetur adipiscing elit. In tellus elit, tristique vitae mattis egestas, ultricies vitae risus. Quisque sit amet quam ut urna aliquet
 molestie. Proin blandit ornare dui, a tempor nisl accumsan in. Praesent a consequat felis. Morbi metus diam, auctor in auctor vel, feugiat id odio. Curabitur ex ex,
 dictum quis auctor quis, suscipit id lorem. Aliquam vestibulum dolor nec enim vehicula, porta tristique augue tincidunt. Vivamus ut gravida est. Sed pellentesque, dolor
 vitae tristique consectetur, neque lectus pulvinar dui, sed feugiat purus diam id lectus. Class aptent taciti sociosqu ad litora torquent per conubia nostra, per
diff --git a/src/compression.rs b/src/compression.rs
index c1cf44db..21a8e54b 100644
--- a/src/compression.rs
+++ b/src/compression.rs
@@ -125,7 +125,7 @@ mod test {
 
     #[test]
     fn from_eq_to() {
-        for v in 0..(::std::u16::MAX as u32 + 1) {
+        for v in 0..(u16::MAX as u32 + 1) {
             #[allow(deprecated)]
             let from = CompressionMethod::from_u16(v as u16);
             #[allow(deprecated)]
@@ -135,17 +135,17 @@ mod test {
     }
 
     fn methods() -> Vec<CompressionMethod> {
-        let mut methods = Vec::new();
-        methods.push(CompressionMethod::Stored);
-        #[cfg(any(
-            feature = "deflate",
-            feature = "deflate-miniz",
-            feature = "deflate-zlib"
-        ))]
-        methods.push(CompressionMethod::Deflated);
-        #[cfg(feature = "bzip2")]
-        methods.push(CompressionMethod::Bzip2);
-        methods
+        vec![
+            CompressionMethod::Stored,
+            #[cfg(any(
+                feature = "deflate",
+                feature = "deflate-miniz",
+                feature = "deflate-zlib"
+            ))]
+            CompressionMethod::Deflated,
+            #[cfg(feature = "bzip2")]
+            CompressionMethod::Bzip2,
+        ]
     }
 
     #[test]
diff --git a/src/cp437.rs b/src/cp437.rs
index f9948143..4dba9af1 100644
--- a/src/cp437.rs
+++ b/src/cp437.rs
@@ -6,7 +6,8 @@ pub trait FromCp437 {
     type Target;
 
     /// Function that does the conversion from cp437.
-    /// Gennerally allocations will be avoided if all data falls into the ASCII range.
+    /// Generally allocations will be avoided if all data falls into the ASCII range.
+    #[allow(clippy::wrong_self_convention)]
     fn from_cp437(self) -> Self::Target;
 }
 
diff --git a/src/read.rs b/src/read.rs
index 7b503ed6..8b1f36e2 100644
--- a/src/read.rs
+++ b/src/read.rs
@@ -189,11 +189,11 @@ fn make_crypto_reader<'a>(
     Ok(Ok(reader))
 }
 
-fn make_reader<'a>(
+fn make_reader(
     compression_method: CompressionMethod,
     crc32: u32,
-    reader: CryptoReader<'a>,
-) -> ZipFileReader<'a> {
+    reader: CryptoReader,
+) -> ZipFileReader {
     match compression_method {
         CompressionMethod::Stored => ZipFileReader::Stored(Crc32Reader::new(reader, crc32)),
         #[cfg(any(
@@ -303,7 +303,7 @@ impl<R: Read + io::Seek> ZipArchive<R> {
                 let directory_start = footer
                     .central_directory_offset
                     .checked_add(archive_offset)
-                    .ok_or_else(|| {
+                    .ok_or({
                         ZipError::InvalidArchive("Invalid central directory size or offset")
                     })?;
 
@@ -332,7 +332,7 @@ impl<R: Read + io::Seek> ZipArchive<R> {
         let mut files = Vec::new();
         let mut names_map = HashMap::new();
 
-        if let Err(_) = reader.seek(io::SeekFrom::Start(directory_start)) {
+        if reader.seek(io::SeekFrom::Start(directory_start)).is_err() {
             return Err(ZipError::InvalidArchive(
                 "Could not seek to start of central directory",
             ));
@@ -457,14 +457,14 @@ impl<R: Read + io::Seek> ZipArchive<R> {
     }
 
     /// Get a contained file by index
-    pub fn by_index<'a>(&'a mut self, file_number: usize) -> ZipResult<ZipFile<'a>> {
+    pub fn by_index(&mut self, file_number: usize) -> ZipResult<ZipFile<'_>> {
         Ok(self
             .by_index_with_optional_password(file_number, None)?
             .unwrap())
     }
 
     /// Get a contained file by index without decompressing it
-    pub fn by_index_raw<'a>(&'a mut self, file_number: usize) -> ZipResult<ZipFile<'a>> {
+    pub fn by_index_raw(&mut self, file_number: usize) -> ZipResult<ZipFile<'_>> {
         let reader = &mut self.reader;
         self.files
             .get_mut(file_number)
@@ -1020,7 +1020,7 @@ mod test {
         let mut v = Vec::new();
         v.extend_from_slice(include_bytes!("../tests/data/zip64_demo.zip"));
         let reader = ZipArchive::new(io::Cursor::new(v)).unwrap();
-        assert!(reader.len() == 1);
+        assert_eq!(reader.len(), 1);
     }
 
     #[test]
@@ -1031,7 +1031,7 @@ mod test {
         let mut v = Vec::new();
         v.extend_from_slice(include_bytes!("../tests/data/mimetype.zip"));
         let mut reader = ZipArchive::new(io::Cursor::new(v)).unwrap();
-        assert!(reader.comment() == b"");
+        assert_eq!(reader.comment(), b"");
         assert_eq!(reader.by_index(0).unwrap().central_header_start(), 77);
     }
 
@@ -1044,9 +1044,8 @@ mod test {
         v.extend_from_slice(include_bytes!("../tests/data/mimetype.zip"));
         let mut reader = io::Cursor::new(v);
         loop {
-            match read_zipfile_from_stream(&mut reader).unwrap() {
-                None => break,
-                _ => (),
+            if read_zipfile_from_stream(&mut reader).unwrap().is_none() {
+                break;
             }
         }
     }
@@ -1082,14 +1081,14 @@ mod test {
         let mut buf3 = [0; 5];
         let mut buf4 = [0; 5];
 
-        file1.read(&mut buf1).unwrap();
-        file2.read(&mut buf2).unwrap();
-        file1.read(&mut buf3).unwrap();
-        file2.read(&mut buf4).unwrap();
+        file1.read_exact(&mut buf1).unwrap();
+        file2.read_exact(&mut buf2).unwrap();
+        file1.read_exact(&mut buf3).unwrap();
+        file2.read_exact(&mut buf4).unwrap();
 
         assert_eq!(buf1, buf2);
         assert_eq!(buf3, buf4);
-        assert!(buf1 != buf3);
+        assert_ne!(buf1, buf3);
     }
 
     #[test]
diff --git a/src/types.rs b/src/types.rs
index f99bc06b..88434e3f 100644
--- a/src/types.rs
+++ b/src/types.rs
@@ -65,7 +65,7 @@ impl DateTime {
         let seconds = (timepart & 0b0000000000011111) << 1;
         let minutes = (timepart & 0b0000011111100000) >> 5;
         let hours = (timepart & 0b1111100000000000) >> 11;
-        let days = (datepart & 0b0000000000011111) >> 0;
+        let days = datepart & 0b0000000000011111;
         let months = (datepart & 0b0000000111100000) >> 5;
         let years = (datepart & 0b1111111000000000) >> 9;
 
@@ -88,6 +88,7 @@ impl DateTime {
     /// * hour: [0, 23]
     /// * minute: [0, 59]
     /// * second: [0, 60]
+    #[allow(clippy::result_unit_err)]
     pub fn from_date_and_time(
         year: u16,
         month: u8,
@@ -96,8 +97,7 @@ impl DateTime {
         minute: u8,
         second: u8,
     ) -> Result<DateTime, ()> {
-        if year >= 1980
-            && year <= 2107
+        if (1980..=2107).contains(&year)
             && month >= 1
             && month <= 12
             && day >= 1
@@ -123,6 +123,7 @@ impl DateTime {
     /// Converts a OffsetDateTime object to a DateTime
     ///
     /// Returns `Err` when this object is out of bounds
+    #[allow(clippy::result_unit_err)]
     pub fn from_time(dt: OffsetDateTime) -> Result<DateTime, ()> {
         if dt.year() >= 1980 && dt.year() <= 2107 {
             Ok(DateTime {
@@ -256,10 +257,7 @@ impl ZipFileData {
 
         ::std::path::Path::new(&filename)
             .components()
-            .filter(|component| match *component {
-                ::std::path::Component::Normal(..) => true,
-                _ => false,
-            })
+            .filter(|component| matches!(*component, ::std::path::Component::Normal(..)))
             .fold(::std::path::PathBuf::new(), |mut path, ref cur| {
                 path.push(cur.as_os_str());
                 path
@@ -325,6 +323,7 @@ mod test {
     }
 
     #[test]
+    #[allow(clippy::unusual_byte_groupings)]
     fn datetime_default() {
         use super::DateTime;
         let dt = DateTime::default();
@@ -333,6 +332,7 @@ mod test {
     }
 
     #[test]
+    #[allow(clippy::unusual_byte_groupings)]
     fn datetime_max() {
         use super::DateTime;
         let dt = DateTime::from_date_and_time(2107, 12, 31, 23, 59, 60).unwrap();
@@ -394,7 +394,7 @@ mod test {
 
         #[cfg(feature = "time")]
         assert_eq!(
-            format!("{}", dt.to_time().unwrap().format(&Rfc3339).unwrap()),
+            dt.to_time().unwrap().format(&Rfc3339).unwrap(),
             "2018-11-17T10:38:30Z"
         );
     }
diff --git a/src/write.rs b/src/write.rs
index 2f904a61..964f07dd 100644
--- a/src/write.rs
+++ b/src/write.rs
@@ -237,7 +237,10 @@ impl<A: Read + Write + io::Seek> ZipWriter<A> {
         let (archive_offset, directory_start, number_of_files) =
             ZipArchive::get_directory_counts(&mut readwriter, &footer, cde_start_pos)?;
 
-        if let Err(_) = readwriter.seek(io::SeekFrom::Start(directory_start)) {
+        if readwriter
+            .seek(io::SeekFrom::Start(directory_start))
+            .is_err()
+        {
             return Err(ZipError::InvalidArchive(
                 "Could not seek to start of central directory",
             ));
@@ -307,7 +310,7 @@ impl<W: Write + io::Seek> ZipWriter<W> {
     {
         self.finish_file()?;
 
-        let raw_values = raw_values.unwrap_or_else(|| ZipRawValues {
+        let raw_values = raw_values.unwrap_or(ZipRawValues {
             crc32: 0,
             compressed_size: 0,
             uncompressed_size: 0,
@@ -548,7 +551,7 @@ impl<W: Write + io::Seek> ZipWriter<W> {
         }
         let file = self.files.last_mut().unwrap();
 
-        validate_extra_data(&file)?;
+        validate_extra_data(file)?;
 
         if !self.writing_to_central_extra_field_only {
             let writer = self.inner.get_plain();
@@ -858,10 +861,7 @@ impl<W: Write + io::Seek> GenericZipWriter<W> {
     }
 
     fn is_closed(&self) -> bool {
-        match *self {
-            GenericZipWriter::Closed => true,
-            _ => false,
-        }
+        matches!(*self, GenericZipWriter::Closed)
     }
 
     fn get_plain(&mut self) -> &mut W {
@@ -935,7 +935,7 @@ fn write_local_file_header<T: Write>(writer: &mut T, file: &ZipFileData) -> ZipR
     writer.write_all(file.file_name.as_bytes())?;
     // zip64 extra field
     if file.large_file {
-        write_local_zip64_extra_field(writer, &file)?;
+        write_local_zip64_extra_field(writer, file)?;
     }
 
     Ok(())
@@ -1053,7 +1053,7 @@ fn validate_extra_data(file: &ZipFileData) -> ZipResult<()> {
         )));
     }
 
-    while data.len() > 0 {
+    while !data.is_empty() {
         let left = data.len();
         if left < 4 {
             return Err(ZipError::Io(io::Error::new(
@@ -1233,7 +1233,7 @@ mod test {
         };
         writer.start_file("mimetype", options).unwrap();
         writer
-            .write(b"application/vnd.oasis.opendocument.text")
+            .write_all(b"application/vnd.oasis.opendocument.text")
             .unwrap();
         let result = writer.finish().unwrap();
 
diff --git a/src/zipcrypto.rs b/src/zipcrypto.rs
index 3196ea36..91d40395 100644
--- a/src/zipcrypto.rs
+++ b/src/zipcrypto.rs
@@ -47,7 +47,7 @@ impl ZipCryptoKeys {
     }
 
     fn crc32(crc: Wrapping<u32>, input: u8) -> Wrapping<u32> {
-        return (crc >> 8) ^ Wrapping(CRCTABLE[((crc & Wrapping(0xff)).0 as u8 ^ input) as usize]);
+        (crc >> 8) ^ Wrapping(CRCTABLE[((crc & Wrapping(0xff)).0 as u8 ^ input) as usize])
     }
 }
 
@@ -71,7 +71,7 @@ impl<R: std::io::Read> ZipCryptoReader<R> {
     /// password byte sequence that is unrepresentable in UTF-8.
     pub fn new(file: R, password: &[u8]) -> ZipCryptoReader<R> {
         let mut result = ZipCryptoReader {
-            file: file,
+            file,
             keys: ZipCryptoKeys::new(),
         };
 
@@ -129,11 +129,11 @@ pub struct ZipCryptoReaderValid<R> {
 }
 
 impl<R: std::io::Read> std::io::Read for ZipCryptoReaderValid<R> {
-    fn read(&mut self, mut buf: &mut [u8]) -> std::io::Result<usize> {
+    fn read(&mut self, buf: &mut [u8]) -> std::io::Result<usize> {
         // Note: There might be potential for optimization. Inspiration can be found at:
         // https://github.com/kornelski/7z/blob/master/CPP/7zip/Crypto/ZipCrypto.cpp
 
-        let result = self.reader.file.read(&mut buf);
+        let result = self.reader.file.read(buf);
         for byte in buf.iter_mut() {
             *byte = self.reader.keys.decrypt_byte(*byte);
         }
diff --git a/tests/end_to_end.rs b/tests/end_to_end.rs
index baebd287..d0185f60 100644
--- a/tests/end_to_end.rs
+++ b/tests/end_to_end.rs
@@ -100,7 +100,7 @@ fn read_zip<R: Read + Seek>(zip_file: R) -> zip::result::ZipResult<zip::ZipArchi
         "test_with_extra_data/🐢.txt",
         ENTRY_NAME,
     ];
-    let expected_file_names = HashSet::from_iter(expected_file_names.iter().map(|&v| v));
+    let expected_file_names = HashSet::from_iter(expected_file_names.iter().copied());
     let file_names = archive.file_names().collect::<HashSet<_>>();
     assert_eq!(file_names, expected_file_names);
 
@@ -134,17 +134,17 @@ fn check_zip_contents(zip_file: &mut Cursor<Vec<u8>>, name: &str) {
 
 fn check_zip_file_contents<R: Read + Seek>(archive: &mut zip::ZipArchive<R>, name: &str) {
     let file_contents: String = read_zip_file(archive, name).unwrap();
-    assert!(file_contents.as_bytes() == LOREM_IPSUM);
+    assert_eq!(file_contents.as_bytes(), LOREM_IPSUM);
 }
 
-const LOREM_IPSUM : &'static [u8] = b"Lorem ipsum dolor sit amet, consectetur adipiscing elit. In tellus elit, tristique vitae mattis egestas, ultricies vitae risus. Quisque sit amet quam ut urna aliquet
+const LOREM_IPSUM : &[u8] = b"Lorem ipsum dolor sit amet, consectetur adipiscing elit. In tellus elit, tristique vitae mattis egestas, ultricies vitae risus. Quisque sit amet quam ut urna aliquet
 molestie. Proin blandit ornare dui, a tempor nisl accumsan in. Praesent a consequat felis. Morbi metus diam, auctor in auctor vel, feugiat id odio. Curabitur ex ex,
 dictum quis auctor quis, suscipit id lorem. Aliquam vestibulum dolor nec enim vehicula, porta tristique augue tincidunt. Vivamus ut gravida est. Sed pellentesque, dolor
 vitae tristique consectetur, neque lectus pulvinar dui, sed feugiat purus diam id lectus. Class aptent taciti sociosqu ad litora torquent per conubia nostra, per
 inceptos himenaeos. Maecenas feugiat velit in ex ultrices scelerisque id id neque.
 ";
 
-const EXTRA_DATA: &'static [u8] = b"Extra Data";
+const EXTRA_DATA: &[u8] = b"Extra Data";
 
 const ENTRY_NAME: &str = "test/lorem_ipsum.txt";