diff --git a/src/kv/error.rs b/src/kv/error.rs
index 120d74919..baf103a22 100644
--- a/src/kv/error.rs
+++ b/src/kv/error.rs
@@ -52,7 +52,7 @@ mod std_support {
     use super::*;
     use std::{error, io};
 
-    pub(super) type BoxedError = Box<error::Error + Send + Sync>;
+    pub(super) type BoxedError = Box<dyn error::Error + Send + Sync>;
 
     impl Error {
         /// Create an error from a standard error type.
diff --git a/src/kv/source.rs b/src/kv/source.rs
index 914f3bdac..a882068f9 100644
--- a/src/kv/source.rs
+++ b/src/kv/source.rs
@@ -19,7 +19,7 @@ pub trait Source {
     ///
     /// A source should yield the same key-value pairs to a subsequent visitor unless
     /// that visitor itself fails.
-    fn visit<'kvs>(&'kvs self, visitor: &mut Visitor<'kvs>) -> Result<(), Error>;
+    fn visit<'kvs>(&'kvs self, visitor: &mut dyn Visitor<'kvs>) -> Result<(), Error>;
 
     /// Get the value for a given key.
     ///
@@ -82,7 +82,7 @@ impl<'a, T> Source for &'a T
 where
     T: Source + ?Sized,
 {
-    fn visit<'kvs>(&'kvs self, visitor: &mut Visitor<'kvs>) -> Result<(), Error> {
+    fn visit<'kvs>(&'kvs self, visitor: &mut dyn Visitor<'kvs>) -> Result<(), Error> {
         Source::visit(&**self, visitor)
     }
 
@@ -100,7 +100,7 @@ where
     K: ToKey,
     V: ToValue,
 {
-    fn visit<'kvs>(&'kvs self, visitor: &mut Visitor<'kvs>) -> Result<(), Error> {
+    fn visit<'kvs>(&'kvs self, visitor: &mut dyn Visitor<'kvs>) -> Result<(), Error> {
         visitor.visit_pair(self.0.to_key(), self.1.to_value())
     }
 
@@ -121,7 +121,7 @@ impl<S> Source for [S]
 where
     S: Source,
 {
-    fn visit<'kvs>(&'kvs self, visitor: &mut Visitor<'kvs>) -> Result<(), Error> {
+    fn visit<'kvs>(&'kvs self, visitor: &mut dyn Visitor<'kvs>) -> Result<(), Error> {
         for source in self {
             source.visit(visitor)?;
         }
@@ -138,7 +138,7 @@ impl<S> Source for Option<S>
 where
     S: Source,
 {
-    fn visit<'kvs>(&'kvs self, visitor: &mut Visitor<'kvs>) -> Result<(), Error> {
+    fn visit<'kvs>(&'kvs self, visitor: &mut dyn Visitor<'kvs>) -> Result<(), Error> {
         if let Some(ref source) = *self {
             source.visit(visitor)?;
         }
@@ -206,7 +206,7 @@ mod std_support {
     where
         S: Source + ?Sized,
     {
-        fn visit<'kvs>(&'kvs self, visitor: &mut Visitor<'kvs>) -> Result<(), Error> {
+        fn visit<'kvs>(&'kvs self, visitor: &mut dyn Visitor<'kvs>) -> Result<(), Error> {
             Source::visit(&**self, visitor)
         }
 
@@ -223,7 +223,7 @@ mod std_support {
     where
         S: Source,
     {
-        fn visit<'kvs>(&'kvs self, visitor: &mut Visitor<'kvs>) -> Result<(), Error> {
+        fn visit<'kvs>(&'kvs self, visitor: &mut dyn Visitor<'kvs>) -> Result<(), Error> {
             Source::visit(&**self, visitor)
         }
 
@@ -251,7 +251,7 @@ mod std_support {
         V: ToValue,
         S: BuildHasher,
     {
-        fn visit<'kvs>(&'kvs self, visitor: &mut Visitor<'kvs>) -> Result<(), Error> {
+        fn visit<'kvs>(&'kvs self, visitor: &mut dyn Visitor<'kvs>) -> Result<(), Error> {
             for (key, value) in self {
                 visitor.visit_pair(key.to_key(), value.to_value())?;
             }
@@ -272,7 +272,7 @@ mod std_support {
         K: ToKey + Borrow<str> + Ord,
         V: ToValue,
     {
-        fn visit<'kvs>(&'kvs self, visitor: &mut Visitor<'kvs>) -> Result<(), Error> {
+        fn visit<'kvs>(&'kvs self, visitor: &mut dyn Visitor<'kvs>) -> Result<(), Error> {
             for (key, value) in self {
                 visitor.visit_pair(key.to_key(), value.to_value())?;
             }
@@ -347,12 +347,12 @@ mod tests {
 
     #[test]
     fn source_is_object_safe() {
-        fn _check(_: &Source) {}
+        fn _check(_: &dyn Source) {}
     }
 
     #[test]
     fn visitor_is_object_safe() {
-        fn _check(_: &Visitor) {}
+        fn _check(_: &dyn Visitor) {}
     }
 
     #[test]
@@ -363,7 +363,7 @@ mod tests {
         }
 
         impl Source for OnePair {
-            fn visit<'kvs>(&'kvs self, visitor: &mut Visitor<'kvs>) -> Result<(), Error> {
+            fn visit<'kvs>(&'kvs self, visitor: &mut dyn Visitor<'kvs>) -> Result<(), Error> {
                 visitor.visit_pair(self.key.to_key(), self.value.to_value())
             }
         }
diff --git a/src/kv/value/internal.rs b/src/kv/value/internal.rs
index c437ab73e..f2c22a510 100644
--- a/src/kv/value/internal.rs
+++ b/src/kv/value/internal.rs
@@ -12,19 +12,19 @@ pub(super) enum Inner<'v> {
     /// A simple primitive value that can be copied without allocating.
     Primitive(Primitive<'v>),
     /// A value that can be filled.
-    Fill(&'v Fill),
+    Fill(&'v dyn Fill),
     /// A debuggable value.
-    Debug(&'v fmt::Debug),
+    Debug(&'v dyn fmt::Debug),
     /// A displayable value.
-    Display(&'v fmt::Display),
+    Display(&'v dyn fmt::Display),
 
     #[cfg(feature = "kv_unstable_sval")]
     /// A structured value from `sval`.
-    Sval(&'v sval_support::Value),
+    Sval(&'v dyn sval_support::Value),
 }
 
 impl<'v> Inner<'v> {
-    pub(super) fn visit(&self, visitor: &mut Visitor) -> Result<(), Error> {
+    pub(super) fn visit(&self, visitor: &mut dyn Visitor) -> Result<(), Error> {
         match *self {
             Inner::Primitive(value) => match value {
                 Primitive::Signed(value) => visitor.i64(value),
@@ -47,8 +47,8 @@ impl<'v> Inner<'v> {
 
 /// The internal serialization contract.
 pub(super) trait Visitor {
-    fn debug(&mut self, v: &fmt::Debug) -> Result<(), Error>;
-    fn display(&mut self, v: &fmt::Display) -> Result<(), Error> {
+    fn debug(&mut self, v: &dyn fmt::Debug) -> Result<(), Error>;
+    fn display(&mut self, v: &dyn fmt::Display) -> Result<(), Error> {
         self.debug(&format_args!("{}", v))
     }
 
@@ -61,7 +61,7 @@ pub(super) trait Visitor {
     fn none(&mut self) -> Result<(), Error>;
 
     #[cfg(feature = "kv_unstable_sval")]
-    fn sval(&mut self, v: &sval_support::Value) -> Result<(), Error>;
+    fn sval(&mut self, v: &dyn sval_support::Value) -> Result<(), Error>;
 }
 
 #[derive(Clone, Copy)]
@@ -119,7 +119,7 @@ mod fmt_support {
     struct FmtVisitor<'a, 'b: 'a>(&'a mut fmt::Formatter<'b>);
 
     impl<'a, 'b: 'a> Visitor for FmtVisitor<'a, 'b> {
-        fn debug(&mut self, v: &fmt::Debug) -> Result<(), Error> {
+        fn debug(&mut self, v: &dyn fmt::Debug) -> Result<(), Error> {
             v.fmt(self.0)?;
 
             Ok(())
@@ -154,7 +154,7 @@ mod fmt_support {
         }
 
         #[cfg(feature = "kv_unstable_sval")]
-        fn sval(&mut self, v: &sval_support::Value) -> Result<(), Error> {
+        fn sval(&mut self, v: &dyn sval_support::Value) -> Result<(), Error> {
             sval_support::fmt(self.0, v)
         }
     }
@@ -188,7 +188,7 @@ pub(super) mod sval_support {
 
     pub(in kv::value) use self::sval::Value;
 
-    pub(super) fn fmt(f: &mut fmt::Formatter, v: &sval::Value) -> Result<(), Error> {
+    pub(super) fn fmt(f: &mut fmt::Formatter, v: &dyn sval::Value) -> Result<(), Error> {
         sval::fmt::debug(f, v)?;
         Ok(())
     }
@@ -206,7 +206,7 @@ pub(super) mod sval_support {
     struct SvalVisitor<'a, 'b: 'a>(&'a mut sval::value::Stream<'b>);
 
     impl<'a, 'b: 'a> Visitor for SvalVisitor<'a, 'b> {
-        fn debug(&mut self, v: &fmt::Debug) -> Result<(), Error> {
+        fn debug(&mut self, v: &dyn fmt::Debug) -> Result<(), Error> {
             self.0
                 .fmt(format_args!("{:?}", v))
                 .map_err(Error::from_sval)
@@ -240,7 +240,7 @@ pub(super) mod sval_support {
             self.0.none().map_err(Error::from_sval)
         }
 
-        fn sval(&mut self, v: &sval::Value) -> Result<(), Error> {
+        fn sval(&mut self, v: &dyn sval::Value) -> Result<(), Error> {
             self.0.any(v).map_err(Error::from_sval)
         }
     }
diff --git a/src/kv/value/mod.rs b/src/kv/value/mod.rs
index 5872cc57c..332170d33 100644
--- a/src/kv/value/mod.rs
+++ b/src/kv/value/mod.rs
@@ -55,7 +55,7 @@ where
 /// A value slot to fill using the [`Fill`](trait.Fill.html) trait.
 pub struct Slot<'a> {
     filled: bool,
-    visitor: &'a mut Visitor,
+    visitor: &'a mut dyn Visitor,
 }
 
 impl<'a> fmt::Debug for Slot<'a> {
@@ -65,7 +65,7 @@ impl<'a> fmt::Debug for Slot<'a> {
 }
 
 impl<'a> Slot<'a> {
-    fn new(visitor: &'a mut Visitor) -> Self {
+    fn new(visitor: &'a mut dyn Visitor) -> Self {
         Slot {
             visitor,
             filled: false,
@@ -110,7 +110,7 @@ impl<'v> Value<'v> {
         }
     }
 
-    fn visit(&self, visitor: &mut Visitor) -> Result<(), Error> {
+    fn visit(&self, visitor: &mut dyn Visitor) -> Result<(), Error> {
         self.inner.visit(visitor)
     }
 }
@@ -125,7 +125,7 @@ mod tests {
 
         impl Fill for TestFill {
             fn fill(&self, slot: &mut Slot) -> Result<(), Error> {
-                let dbg: &fmt::Debug = &1;
+                let dbg: &dyn fmt::Debug = &1;
 
                 slot.fill(Value::from_debug(&dbg))
             }
diff --git a/src/kv/value/test.rs b/src/kv/value/test.rs
index 61f2d3ac8..f57715b9d 100644
--- a/src/kv/value/test.rs
+++ b/src/kv/value/test.rs
@@ -26,7 +26,7 @@ impl<'v> Value<'v> {
         struct TestVisitor(Option<Token>);
 
         impl internal::Visitor for TestVisitor {
-            fn debug(&mut self, v: &fmt::Debug) -> Result<(), Error> {
+            fn debug(&mut self, v: &dyn fmt::Debug) -> Result<(), Error> {
                 self.0 = Some(Token::Str(format!("{:?}", v)));
                 Ok(())
             }
@@ -67,7 +67,7 @@ impl<'v> Value<'v> {
             }
 
             #[cfg(feature = "kv_unstable_sval")]
-            fn sval(&mut self, _: &internal::sval_support::Value) -> Result<(), Error> {
+            fn sval(&mut self, _: &dyn internal::sval_support::Value) -> Result<(), Error> {
                 self.0 = Some(Token::Sval);
                 Ok(())
             }
diff --git a/src/lib.rs b/src/lib.rs
index c8f9377ae..dedfb1b9f 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -305,7 +305,7 @@ pub mod kv;
 
 // The LOGGER static holds a pointer to the global logger. It is protected by
 // the STATE static which determines whether LOGGER has been initialized yet.
-static mut LOGGER: &'static Log = &NopLogger;
+static mut LOGGER: &dyn Log = &NopLogger;
 
 #[allow(deprecated)]
 static STATE: AtomicUsize = ATOMIC_USIZE_INIT;
@@ -320,11 +320,11 @@ const INITIALIZED: usize = 2;
 #[allow(deprecated)]
 static MAX_LOG_LEVEL_FILTER: AtomicUsize = ATOMIC_USIZE_INIT;
 
-static LOG_LEVEL_NAMES: [&'static str; 6] = ["OFF", "ERROR", "WARN", "INFO", "DEBUG", "TRACE"];
+static LOG_LEVEL_NAMES: [&str; 6] = ["OFF", "ERROR", "WARN", "INFO", "DEBUG", "TRACE"];
 
-static SET_LOGGER_ERROR: &'static str = "attempted to set a logger after the logging system \
-                                         was already initialized";
-static LEVEL_PARSE_ERROR: &'static str =
+static SET_LOGGER_ERROR: &str = "attempted to set a logger after the logging system \
+                                 was already initialized";
+static LEVEL_PARSE_ERROR: &str =
     "attempted to convert a string that doesn't match an existing log level";
 
 /// An enum representing the available verbosity levels of the logger.
@@ -746,7 +746,7 @@ pub struct Record<'a> {
 // the underlying `Source`.
 #[cfg(feature = "kv_unstable")]
 #[derive(Clone)]
-struct KeyValues<'a>(&'a kv::Source);
+struct KeyValues<'a>(&'a dyn kv::Source);
 
 #[cfg(feature = "kv_unstable")]
 impl<'a> fmt::Debug for KeyValues<'a> {
@@ -827,7 +827,7 @@ impl<'a> Record<'a> {
     /// The structued key-value pairs associated with the message.
     #[cfg(feature = "kv_unstable")]
     #[inline]
-    pub fn key_values(&self) -> &kv::Source {
+    pub fn key_values(&self) -> &dyn kv::Source {
         self.key_values.0
     }
 
@@ -990,7 +990,7 @@ impl<'a> RecordBuilder<'a> {
     /// Set [`key_values`](struct.Record.html#method.key_values)
     #[cfg(feature = "kv_unstable")]
     #[inline]
-    pub fn key_values(&mut self, kvs: &'a kv::Source) -> &mut RecordBuilder<'a> {
+    pub fn key_values(&mut self, kvs: &'a dyn kv::Source) -> &mut RecordBuilder<'a> {
         self.record.key_values = KeyValues(kvs);
         self
     }
@@ -1198,8 +1198,8 @@ pub fn max_level() -> LevelFilter {
 ///
 /// [`set_logger`]: fn.set_logger.html
 #[cfg(all(feature = "std", atomic_cas))]
-pub fn set_boxed_logger(logger: Box<Log>) -> Result<(), SetLoggerError> {
-    set_logger_inner(|| unsafe { &*Box::into_raw(logger) })
+pub fn set_boxed_logger(logger: Box<dyn Log>) -> Result<(), SetLoggerError> {
+    set_logger_inner(|| Box::leak(logger))
 }
 
 /// Sets the global logger to a `&'static Log`.
@@ -1256,14 +1256,14 @@ pub fn set_boxed_logger(logger: Box<Log>) -> Result<(), SetLoggerError> {
 ///
 /// [`set_logger_racy`]: fn.set_logger_racy.html
 #[cfg(atomic_cas)]
-pub fn set_logger(logger: &'static Log) -> Result<(), SetLoggerError> {
+pub fn set_logger(logger: &'static dyn Log) -> Result<(), SetLoggerError> {
     set_logger_inner(|| logger)
 }
 
 #[cfg(atomic_cas)]
 fn set_logger_inner<F>(make_logger: F) -> Result<(), SetLoggerError>
 where
-    F: FnOnce() -> &'static Log,
+    F: FnOnce() -> &'static dyn Log,
 {
     unsafe {
         match STATE.compare_and_swap(UNINITIALIZED, INITIALIZING, Ordering::SeqCst) {
@@ -1300,7 +1300,7 @@ where
 /// (including all logging macros).
 ///
 /// [`set_logger`]: fn.set_logger.html
-pub unsafe fn set_logger_racy(logger: &'static Log) -> Result<(), SetLoggerError> {
+pub unsafe fn set_logger_racy(logger: &'static dyn Log) -> Result<(), SetLoggerError> {
     match STATE.load(Ordering::SeqCst) {
         UNINITIALIZED => {
             LOGGER = logger;
@@ -1360,7 +1360,7 @@ impl error::Error for ParseLevelError {
 /// Returns a reference to the logger.
 ///
 /// If a logger has not been set, a no-op implementation is returned.
-pub fn logger() -> &'static Log {
+pub fn logger() -> &'static dyn Log {
     unsafe {
         if STATE.load(Ordering::SeqCst) != INITIALIZED {
             static NOP: NopLogger = NopLogger;
@@ -1405,7 +1405,7 @@ pub fn __private_api_log(
     args: fmt::Arguments<'_>,
     level: Level,
     &(target, module_path, file, line): &(&str, &'static str, &'static str, u32),
-    kvs: Option<&[(&str, &kv::ToValue)]>,
+    kvs: Option<&[(&str, &dyn kv::ToValue)]>,
 ) {
     logger().log(
         &Record::builder()
diff --git a/test_max_level_features/main.rs b/test_max_level_features/main.rs
index ba5ce1138..bfbf2b247 100644
--- a/test_max_level_features/main.rs
+++ b/test_max_level_features/main.rs
@@ -8,9 +8,7 @@ use log::{Level, LevelFilter, Log, Record, Metadata};
 use log::set_boxed_logger;
 #[cfg(not(feature = "std"))]
 fn set_boxed_logger(logger: Box<Log>) -> Result<(), log::SetLoggerError> {
-    unsafe {
-        log::set_logger(&*Box::into_raw(logger))
-    }
+    log::set_logger(Box::leak(logger))
 }
 
 struct State {
diff --git a/tests/filters.rs b/tests/filters.rs
index e4d21a87f..3c261c469 100644
--- a/tests/filters.rs
+++ b/tests/filters.rs
@@ -8,8 +8,8 @@ use std::sync::{Arc, Mutex};
 use log::set_boxed_logger;
 
 #[cfg(not(feature = "std"))]
-fn set_boxed_logger(logger: Box<Log>) -> Result<(), log::SetLoggerError> {
-    log::set_logger(unsafe { &*Box::into_raw(logger) })
+fn set_boxed_logger(logger: Box<dyn Log>) -> Result<(), log::SetLoggerError> {
+    log::set_logger(Box::leak(logger))
 }
 
 struct State {