diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index e89f5ad..1e7dfa7 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -11,8 +11,3 @@ repos:
       entry: ruff format
       language: system
       types: [python]
-    - id: pyupgrade
-      name: pyupgrade
-      entry: pyupgrade --exit-zero-even-if-changed
-      language: system
-      types: [python]
diff --git a/.ruff.toml b/.ruff.toml
index edd3313..6c49746 100644
--- a/.ruff.toml
+++ b/.ruff.toml
@@ -11,6 +11,7 @@ extend-select = [
     "E",  # pycodestyle errors
     "F",  # pyflakes
     "I",  # isort
+    "UP", # Pyupgrade
     "W",  # pycodestyle warnings
 ]
 ignore = [
diff --git a/pgtoolkit/conf.py b/pgtoolkit/conf.py
index 1401cfe..a2648b2 100644
--- a/pgtoolkit/conf.py
+++ b/pgtoolkit/conf.py
@@ -286,7 +286,7 @@ def serialize_value(value: Value) -> str:
             # done everywhere in the string or nowhere.
             if "''" not in value and r"\'" not in value:
                 value = value.replace("'", "''")
-            value = "'%s'" % value
+            value = f"'{value}'"
     elif isinstance(value, timedelta):
         seconds = value.days * _day + value.seconds
         if value.microseconds:
@@ -340,7 +340,7 @@ def serialize(self) -> str:
         return serialize_value(self.value)
 
     def __str__(self) -> str:
-        line = "%(name)s = %(value)s" % dict(name=self.name, value=self.serialize())
+        line = "{name} = {value}".format(**dict(name=self.name, value=self.serialize()))
         if self.comment:
             line += "  # " + self.comment
         if self.commented:
@@ -497,7 +497,7 @@ def parse(self, fo: Iterable[str]) -> Iterator[tuple[pathlib.Path, IncludeType]]
             else:
                 m = self._parameter_re.match(line)
                 if not m:
-                    raise ValueError("Bad line: %r." % raw_line)
+                    raise ValueError(f"Bad line: {raw_line!r}.")
             kwargs = m.groupdict()
             name = kwargs.pop("name")
             value = parse_value(kwargs.pop("value"))
diff --git a/pgtoolkit/errors.py b/pgtoolkit/errors.py
index 60afdd7..68f151a 100644
--- a/pgtoolkit/errors.py
+++ b/pgtoolkit/errors.py
@@ -8,15 +8,7 @@ def __init__(self, lineno: int, line: str, message: str) -> None:
         self.line = line
 
     def __repr__(self) -> str:
-        return "<%s at line %d: %.32s>" % (
-            self.__class__.__name__,
-            self.lineno,
-            self.args[0],
-        )
+        return f"<{self.__class__.__name__} at line {self.lineno}: {self.args[0]:.32}>"
 
     def __str__(self) -> str:
-        return "Bad line #{} '{:.32}': {}".format(
-            self.lineno,
-            self.line.strip(),
-            self.args[0],
-        )
+        return f"Bad line #{self.lineno} '{self.line.strip():.32}': {self.args[0]}"
diff --git a/pgtoolkit/hba.py b/pgtoolkit/hba.py
index 8c57d19..b23c0b5 100644
--- a/pgtoolkit/hba.py
+++ b/pgtoolkit/hba.py
@@ -158,7 +158,7 @@ def parse(cls, line: str) -> HBARecord:
             comment = " ".join(comments[1:])
 
         if values[0] not in cls.CONNECTION_TYPES:
-            raise ValueError("Unknown connection type '%s'" % values[0])
+            raise ValueError(f"Unknown connection type '{values[0]}'")
         if "local" != values[0]:
             record_fields.append("address")
         common_values = [v for v in values if "=" not in v]
@@ -220,14 +220,14 @@ def __str__(self) -> str:
                 continue
 
             if width:
-                fmt += "%%(%s)-%ds " % (field, width - 1)
+                fmt += f"%%({field})-%ds " % (width - 1)
             else:
                 fmt += f"%({field})s "
         # Serialize database and user list using property.
         values = dict(self.__dict__, databases=self.database, users=self.user)
         line = fmt.rstrip() % values
 
-        auth_options = ['%s="%s"' % i for i in self.auth_options]
+        auth_options = ['{}="{}"'.format(*i) for i in self.auth_options]
         if auth_options:
             line += " " + " ".join(auth_options)
 
@@ -290,7 +290,7 @@ def matches(self, **attrs: str) -> bool:
         # Provided attributes should be comparable to HBARecord attributes
         for k in attrs.keys():
             if k not in self.COMMON_FIELDS + ["database", "user"]:
-                raise AttributeError("%s is not a valid attribute" % k)
+                raise AttributeError(f"{k} is not a valid attribute")
 
         for k, v in attrs.items():
             if getattr(self, k, None) != v:
@@ -326,7 +326,7 @@ def __init__(self, entries: Iterable[HBAComment | HBARecord] | None = None) -> N
         :param entries: A list of HBAComment or HBARecord. Optional.
         """
         if entries and not isinstance(entries, list):
-            raise ValueError("%s should be a list" % entries)
+            raise ValueError(f"{entries} should be a list")
         self.lines = list(entries) if entries is not None else []
         self.path = None
 
diff --git a/pgtoolkit/log/parser.py b/pgtoolkit/log/parser.py
index aeb3a85..1fafe86 100644
--- a/pgtoolkit/log/parser.py
+++ b/pgtoolkit/log/parser.py
@@ -118,11 +118,11 @@ def parse_isodatetime(raw: str) -> datetime:
             int(raw[20:23]) if raw[19] == "." else 0,
         )
     except ValueError:
-        raise ValueError("%s is not a known date" % raw)
+        raise ValueError(f"{raw} is not a known date")
 
     if raw[-3:] != "UTC":
         # We need tzdata for that.
-        raise ValueError("%s not in UTC." % raw)
+        raise ValueError(f"{raw} not in UTC.")
 
     return datetime(*infos)
 
diff --git a/pgtoolkit/pgpass.py b/pgtoolkit/pgpass.py
index 47ae1e3..bda6e72 100644
--- a/pgtoolkit/pgpass.py
+++ b/pgtoolkit/pgpass.py
@@ -244,13 +244,7 @@ def __lt__(self, other: PassComment | PassEntry) -> bool:
         return NotImplemented
 
     def __repr__(self) -> str:
-        return "<{} {}@{}:{}/{}>".format(
-            self.__class__.__name__,
-            self.username,
-            self.hostname,
-            self.port,
-            self.database,
-        )
+        return f"<{self.__class__.__name__} {self.username}@{self.hostname}:{self.port}/{self.database}>"
 
     def __str__(self) -> str:
         return ":".join(
@@ -284,7 +278,7 @@ def matches(self, **attrs: int | str) -> bool:
         expected_attributes = self.__dict__.keys()
         for k in attrs.keys():
             if k not in expected_attributes:
-                raise AttributeError("%s is not a valid attribute" % k)
+                raise AttributeError(f"{k} is not a valid attribute")
 
         for k, v in attrs.items():
             if getattr(self, k) != v:
@@ -328,7 +322,7 @@ def __init__(
         :param entries: A list of PassEntry or PassComment. Optional.
         """
         if entries and not isinstance(entries, list):
-            raise ValueError("%s should be a list" % entries)
+            raise ValueError(f"{entries} should be a list")
         self.lines = entries or []
         self.path = path
 
diff --git a/pgtoolkit/service.py b/pgtoolkit/service.py
index 2ec32bd..fd731e3 100644
--- a/pgtoolkit/service.py
+++ b/pgtoolkit/service.py
@@ -179,7 +179,7 @@ def __init__(self) -> None:
         )
 
     def __repr__(self) -> str:
-        return "<%s>" % (self.__class__.__name__)
+        return f"<{self.__class__.__name__}>"
 
     def __getitem__(self, key: str) -> Service:
         parameters = {
diff --git a/tox.ini b/tox.ini
index 4bdd2d4..db7b2dd 100644
--- a/tox.ini
+++ b/tox.ini
@@ -7,12 +7,9 @@ isolated_build = true
 commands=
   ruff check
   ruff format --check
-  pre-commit run --all-files --show-diff-on-failure pyupgrade
   check-manifest
 deps =
   check-manifest
-  pre-commit
-  pyupgrade
   ruff
 skip_install = true