diff --git a/CHANGELOG.md b/CHANGELOG.md
index dd2bf82..0669846 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,10 @@
 
 ## [Unreleased] - ReleaseDate
 
+### Changed
+
+- update [nom](https://crates.io/crates/nom) to v8
+
 ## [1.2.0] - 2024-03-21
 
 ### Added
diff --git a/Cargo.toml b/Cargo.toml
index d1551a7..0868559 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -16,12 +16,12 @@ exclude = [
 ]
 
 [dependencies]
-nom = "7"
-nom_locate = "4.1"
+nom = "8"
+nom_locate = "5"
 serde = { version = "1.0", default-features = false }
 
 [dev-dependencies]
-serde = { version = "1.0.194", features = ["derive"] }
+serde = { version = "1.0", features = ["derive"] }
 
 [badges]
 maintenance = { status = "passively-maintained" }
diff --git a/Justfile b/Justfile
index 131d0e5..51d3da0 100644
--- a/Justfile
+++ b/Justfile
@@ -11,6 +11,10 @@ run *ARGS:
 test *ARGS:
     cargo test {{ARGS}}
 
+check:
+    cargo clippy -- -D warnings
+    cargo test
+
 doc:
     cargo doc --no-deps
     cargo readme > README.md
@@ -18,8 +22,13 @@ doc:
 serve-doc port='8000': doc
     python3 -m http.server {{port}} --directory target/doc
 
-release version execute='':
-    cargo release --sign --allow-branch master {{ if execute != "" { '-x' } else { '' } }} {{version}}
+release version execute='': check build doc
+    git fetch --all
+    [ "$(git rev-parse master)" = "$(git rev-parse origin/master)" ] \
+        || (echo "error: master and origin/master differ" >&2; exit 1)
+    git branch -f release master
+    git checkout release
+    cargo release --sign --allow-branch release {{ if execute != "" { '-x' } else { '' } }} {{version}}
 
 coverage *ARGS:
     RUSTFLAGS="-C instrument-coverage" cargo test --tests {{ARGS}} || true
diff --git a/src/de.rs b/src/de.rs
index b28e116..067ada1 100644
--- a/src/de.rs
+++ b/src/de.rs
@@ -81,7 +81,7 @@ where
     }
 }
 
-impl<'de, 'a> serde::de::Deserializer<'de> for &'a mut Deserializer<'de> {
+impl<'de> serde::de::Deserializer<'de> for &mut Deserializer<'de> {
     type Error = Error;
 
     fn deserialize_any<V>(self, visitor: V) -> Result<V::Value>
diff --git a/src/parser.rs b/src/parser.rs
index 573d1ce..b471e31 100644
--- a/src/parser.rs
+++ b/src/parser.rs
@@ -4,8 +4,8 @@ use nom::character::complete::{char, digit1, none_of, not_line_ending, one_of};
 use nom::combinator::{cut, eof, map, map_res, opt, recognize, value};
 use nom::multi::many1_count;
 use nom::number::complete::double;
-use nom::sequence::{delimited, preceded, terminated, tuple};
-use nom::{IResult, Slice};
+use nom::sequence::{delimited, preceded, terminated};
+use nom::{IResult, Input as _, Parser as _};
 use nom_locate::LocatedSpan;
 
 pub(crate) type Span<'a> = LocatedSpan<&'a str>;
@@ -35,23 +35,25 @@ fn whitespace(input: Span) -> IResult<Span, char> {
 }
 
 fn null(input: Span) -> IResult<Span, ()> {
-    value((), tag("null"))(input)
+    value((), tag("null")).parse(input)
 }
 
 fn separator(input: Span) -> IResult<Span, &str> {
     map(alt((tag(","), tag("\n"), tag("\r\n"))), |val: Span| {
         *val.fragment()
-    })(input)
+    })
+    .parse(input)
 }
 
 fn bool(input: Span) -> IResult<Span, bool> {
-    alt((value(true, tag("true")), value(false, tag("false"))))(input)
+    alt((value(true, tag("true")), value(false, tag("false")))).parse(input)
 }
 
 fn integer(input: Span) -> IResult<Span, i64> {
-    map_res(recognize(tuple((opt(char('-')), digit1))), |val: Span| {
+    map_res(recognize((opt(char('-')), digit1)), |val: Span| {
         val.fragment().parse::<i64>()
-    })(input)
+    })
+    .parse(input)
 }
 
 fn float(input: Span) -> IResult<Span, f64> {
@@ -61,14 +63,16 @@ fn float(input: Span) -> IResult<Span, f64> {
 fn identifier(input: Span) -> IResult<Span, &str> {
     map(recognize(many1_count(none_of("\" \t\n=:"))), |val: Span| {
         *val.fragment()
-    })(input)
+    })
+    .parse(input)
 }
 
 fn literal_string(input: Span) -> IResult<Span, &str> {
     map(
         delimited(tag("\"\"\""), take_until("\"\"\""), tag("\"\"\"")),
         |val: Span| *val.fragment(),
-    )(input)
+    )
+    .parse(input)
 }
 
 fn string_content(input: Span) -> IResult<Span, &str> {
@@ -84,49 +88,51 @@ fn string_content(input: Span) -> IResult<Span, &str> {
             }
             '\n' if !escaped => {
                 let err = nom::error::Error {
-                    input: input.slice(j..),
+                    input: input.take_from(j),
                     code: nom::error::ErrorKind::Char,
                 };
                 return Err(nom::Err::Error(err));
             }
             '"' if !escaped => {
-                return Ok((input.slice(j..), &buf[0..j]));
+                return Ok((input.take_from(j), &buf[0..j]));
             }
             _ => escaped = false,
         }
     }
 
     let err = nom::error::Error {
-        input: input.slice((i + 1)..),
+        input: input.take_from(i + 1),
         code: nom::error::ErrorKind::Char,
     };
     Err(nom::Err::Failure(err))
 }
 
 fn delimited_string(input: Span) -> IResult<Span, &str> {
-    preceded(char('"'), cut(terminated(string_content, char('"'))))(input)
+    preceded(char('"'), cut(terminated(string_content, char('"')))).parse(input)
 }
 
 fn string(input: Span) -> IResult<Span, &str> {
-    alt((identifier, literal_string, delimited_string))(input)
+    alt((identifier, literal_string, delimited_string)).parse(input)
 }
 
 fn line_comment(input: Span) -> IResult<Span, &str> {
     map(
         preceded(tag("//"), alt((not_line_ending, eof))),
         |val: Span| *val.fragment(),
-    )(input)
+    )
+    .parse(input)
 }
 
 fn block_comment(input: Span) -> IResult<Span, &str> {
     map(
         delimited(tag("/*"), take_until("*/"), tag("*/")),
         |val: Span| *val.fragment(),
-    )(input)
+    )
+    .parse(input)
 }
 
 fn comment(input: Span) -> IResult<Span, &str> {
-    alt((line_comment, block_comment))(input)
+    alt((line_comment, block_comment)).parse(input)
 }
 
 fn optional(input: Span) -> IResult<Span, ()> {
@@ -135,7 +141,7 @@ fn optional(input: Span) -> IResult<Span, ()> {
     let empty = value((), tag(""));
     let content = value((), many1_count(alt((whitespace, comment))));
 
-    alt((content, empty))(input)
+    alt((content, empty)).parse(input)
 }
 
 pub(crate) fn parse_next_token(input: Span) -> IResult<Span, Token> {
@@ -159,45 +165,48 @@ pub(crate) fn parse_next_token(input: Span) -> IResult<Span, Token> {
             map(float, Token::Float),
             map(string, |val| Token::String(val.to_string())),
         )),
-    )(input)
+    )
+    .parse(input)
 }
 
 pub(crate) fn parse_trailing_characters(input: Span) -> IResult<Span, ()> {
-    value((), optional)(input)
+    value((), optional).parse(input)
 }
 
 pub(crate) fn parse_null(input: Span) -> IResult<Span, Token> {
-    preceded(optional, value(Token::Null, null))(input)
+    preceded(optional, value(Token::Null, null)).parse(input)
 }
 
 pub(crate) fn parse_separator(input: Span) -> IResult<Span, Token> {
     preceded(
         opt(horizontal_whitespace),
         value(Token::Separator, separator),
-    )(input)
+    )
+    .parse(input)
 }
 
 pub(crate) fn parse_bool(input: Span) -> IResult<Span, Token> {
-    preceded(optional, map(bool, Token::Boolean))(input)
+    preceded(optional, map(bool, Token::Boolean)).parse(input)
 }
 
 pub(crate) fn parse_integer(input: Span) -> IResult<Span, Token> {
-    preceded(optional, map(integer, Token::Integer))(input)
+    preceded(optional, map(integer, Token::Integer)).parse(input)
 }
 
 pub(crate) fn parse_float(input: Span) -> IResult<Span, Token> {
-    preceded(optional, map(float, Token::Float))(input)
+    preceded(optional, map(float, Token::Float)).parse(input)
 }
 
 pub(crate) fn parse_identifier(input: Span) -> IResult<Span, Token> {
     preceded(
         optional,
         map(identifier, |val| Token::String(val.to_string())),
-    )(input)
+    )
+    .parse(input)
 }
 
 pub(crate) fn parse_string(input: Span) -> IResult<Span, Token> {
-    preceded(optional, map(string, |val| Token::String(val.to_string())))(input)
+    preceded(optional, map(string, |val| Token::String(val.to_string()))).parse(input)
 }
 
 #[cfg(test)]
diff --git a/src/ser.rs b/src/ser.rs
index 7efd83b..b77799d 100644
--- a/src/ser.rs
+++ b/src/ser.rs
@@ -84,7 +84,7 @@ where
     }
 }
 
-impl<'a, W> serde::ser::Serializer for &'a mut Serializer<W>
+impl<W> serde::ser::Serializer for &mut Serializer<W>
 where
     W: io::Write,
 {
@@ -216,9 +216,9 @@ where
         self.serialize_unit()
     }
 
-    fn serialize_some<T: ?Sized>(self, value: &T) -> Result<Self::Ok>
+    fn serialize_some<T>(self, value: &T) -> Result<Self::Ok>
     where
-        T: serde::Serialize,
+        T: serde::Serialize + ?Sized,
     {
         self.ensure_top_level_struct()?;
 
@@ -245,9 +245,9 @@ where
         self.serialize_str(variant)
     }
 
-    fn serialize_newtype_struct<T: ?Sized>(self, _name: &'static str, value: &T) -> Result<Self::Ok>
+    fn serialize_newtype_struct<T>(self, _name: &'static str, value: &T) -> Result<Self::Ok>
     where
-        T: serde::Serialize,
+        T: serde::Serialize + ?Sized,
     {
         self.ensure_top_level_struct()?;
 
@@ -255,7 +255,7 @@ where
     }
 
     // Serialize an externally tagged enum: `{ NAME = VALUE }`.
-    fn serialize_newtype_variant<T: ?Sized>(
+    fn serialize_newtype_variant<T>(
         self,
         _name: &'static str,
         _variant_index: u32,
@@ -263,7 +263,7 @@ where
         value: &T,
     ) -> Result<Self::Ok>
     where
-        T: serde::Serialize,
+        T: serde::Serialize + ?Sized,
     {
         self.ensure_top_level_struct()?;
 
@@ -345,24 +345,24 @@ where
         Ok(self)
     }
 
-    fn collect_str<T: ?Sized>(self, value: &T) -> Result<Self::Ok>
+    fn collect_str<T>(self, value: &T) -> Result<Self::Ok>
     where
-        T: std::fmt::Display,
+        T: std::fmt::Display + ?Sized,
     {
         self.serialize_str(&value.to_string())
     }
 }
 
-impl<'a, W> serde::ser::SerializeSeq for &'a mut Serializer<W>
+impl<W> serde::ser::SerializeSeq for &mut Serializer<W>
 where
     W: io::Write,
 {
     type Ok = ();
     type Error = Error;
 
-    fn serialize_element<T: ?Sized>(&mut self, value: &T) -> Result<()>
+    fn serialize_element<T>(&mut self, value: &T) -> Result<()>
     where
-        T: Serialize,
+        T: Serialize + ?Sized,
     {
         self.add_indent()?;
         value.serialize(&mut **self)?;
@@ -376,16 +376,16 @@ where
     }
 }
 
-impl<'a, W> serde::ser::SerializeTuple for &'a mut Serializer<W>
+impl<W> serde::ser::SerializeTuple for &mut Serializer<W>
 where
     W: io::Write,
 {
     type Ok = ();
     type Error = Error;
 
-    fn serialize_element<T: ?Sized>(&mut self, value: &T) -> Result<()>
+    fn serialize_element<T>(&mut self, value: &T) -> Result<()>
     where
-        T: Serialize,
+        T: Serialize + ?Sized,
     {
         self.add_indent()?;
         value.serialize(&mut **self)?;
@@ -399,16 +399,16 @@ where
     }
 }
 
-impl<'a, W> serde::ser::SerializeTupleStruct for &'a mut Serializer<W>
+impl<W> serde::ser::SerializeTupleStruct for &mut Serializer<W>
 where
     W: io::Write,
 {
     type Ok = ();
     type Error = Error;
 
-    fn serialize_field<T: ?Sized>(&mut self, value: &T) -> Result<()>
+    fn serialize_field<T>(&mut self, value: &T) -> Result<()>
     where
-        T: Serialize,
+        T: Serialize + ?Sized,
     {
         self.add_indent()?;
         value.serialize(&mut **self)?;
@@ -422,16 +422,16 @@ where
     }
 }
 
-impl<'a, W> serde::ser::SerializeTupleVariant for &'a mut Serializer<W>
+impl<W> serde::ser::SerializeTupleVariant for &mut Serializer<W>
 where
     W: io::Write,
 {
     type Ok = ();
     type Error = Error;
 
-    fn serialize_field<T: ?Sized>(&mut self, value: &T) -> Result<()>
+    fn serialize_field<T>(&mut self, value: &T) -> Result<()>
     where
-        T: Serialize,
+        T: Serialize + ?Sized,
     {
         self.add_indent()?;
         value.serialize(&mut **self)?;
@@ -454,24 +454,24 @@ where
     }
 }
 
-impl<'a, W> serde::ser::SerializeMap for &'a mut Serializer<W>
+impl<W> serde::ser::SerializeMap for &mut Serializer<W>
 where
     W: io::Write,
 {
     type Ok = ();
     type Error = Error;
 
-    fn serialize_key<T: ?Sized>(&mut self, key: &T) -> Result<()>
+    fn serialize_key<T>(&mut self, key: &T) -> Result<()>
     where
-        T: Serialize,
+        T: Serialize + ?Sized,
     {
         self.add_indent()?;
         key.serialize(&mut **self)
     }
 
-    fn serialize_value<T: ?Sized>(&mut self, value: &T) -> Result<()>
+    fn serialize_value<T>(&mut self, value: &T) -> Result<()>
     where
-        T: Serialize,
+        T: Serialize + ?Sized,
     {
         // It doesn't make a difference where the `=` is added. But doing it here
         // means `serialize_key` is only a call to a different function, which should
@@ -491,16 +491,16 @@ where
     }
 }
 
-impl<'a, W> serde::ser::SerializeStruct for &'a mut Serializer<W>
+impl<W> serde::ser::SerializeStruct for &mut Serializer<W>
 where
     W: io::Write,
 {
     type Ok = ();
     type Error = Error;
 
-    fn serialize_field<T: ?Sized>(&mut self, key: &'static str, value: &T) -> Result<()>
+    fn serialize_field<T>(&mut self, key: &'static str, value: &T) -> Result<()>
     where
-        T: Serialize,
+        T: Serialize + ?Sized,
     {
         self.add_indent()?;
         key.serialize(&mut **self)?;
@@ -521,16 +521,16 @@ where
     }
 }
 
-impl<'a, W> serde::ser::SerializeStructVariant for &'a mut Serializer<W>
+impl<W> serde::ser::SerializeStructVariant for &mut Serializer<W>
 where
     W: std::io::Write,
 {
     type Ok = ();
     type Error = Error;
 
-    fn serialize_field<T: ?Sized>(&mut self, key: &'static str, value: &T) -> Result<()>
+    fn serialize_field<T>(&mut self, key: &'static str, value: &T) -> Result<()>
     where
-        T: Serialize,
+        T: Serialize + ?Sized,
     {
         self.add_indent()?;
         key.serialize(&mut **self)?;