diff --git a/crates/mun_codegen/src/code_gen/symbols.rs b/crates/mun_codegen/src/code_gen/symbols.rs
index 14334ffc4..11e750f4a 100644
--- a/crates/mun_codegen/src/code_gen/symbols.rs
+++ b/crates/mun_codegen/src/code_gen/symbols.rs
@@ -316,7 +316,7 @@ fn gen_get_info_fn<'ink>(
     );
     builder.build_store(
         num_dependencies_addr,
-        context.context.i32_type().const_int(0 as u64, false),
+        context.context.i32_type().const_int(0u64, false),
     );
 
     // Construct the return statement of the function.
diff --git a/crates/mun_hir/src/expr/scope.rs b/crates/mun_hir/src/expr/scope.rs
index a758a460f..9c60f82f2 100644
--- a/crates/mun_hir/src/expr/scope.rs
+++ b/crates/mun_hir/src/expr/scope.rs
@@ -60,10 +60,10 @@ impl ExprScopes {
         &self.scopes[scope].entries
     }
 
-    pub(crate) fn scope_chain<'a>(
-        &'a self,
+    pub(crate) fn scope_chain(
+        &'_ self,
         scope: Option<LocalScopeId>,
-    ) -> impl Iterator<Item = LocalScopeId> + 'a {
+    ) -> impl Iterator<Item = LocalScopeId> + '_ {
         std::iter::successors(scope, move |&scope| self.scopes[scope].parent)
     }
 
diff --git a/crates/mun_lld/src/lib.rs b/crates/mun_lld/src/lib.rs
index 150da0719..67df9801e 100644
--- a/crates/mun_lld/src/lib.rs
+++ b/crates/mun_lld/src/lib.rs
@@ -1,7 +1,6 @@
 use std::ffi::CStr;
 use std::{
     ffi::CString,
-    iter::FromIterator,
     os::raw::{c_char, c_int},
 };
 
@@ -50,7 +49,7 @@ pub fn link(target: LldFlavor, args: &[String]) -> LldResult {
         .iter()
         .map(|arg| CString::new(arg.as_bytes()).unwrap())
         .collect::<Vec<CString>>();
-    let args: Vec<*const c_char> = Vec::from_iter(c_args.iter().map(|arg| arg.as_ptr()));
+    let args: Vec<*const c_char> = c_args.iter().map(|arg| arg.as_ptr()).collect();
 
     // Invoke LLD
     let mut lld_result = unsafe { mun_lld_link(target, args.len() as c_int, args.as_ptr()) };
diff --git a/crates/mun_syntax/src/parsing/lexer/classes.rs b/crates/mun_syntax/src/parsing/lexer/classes.rs
index 956d2ea48..9a1ffa537 100644
--- a/crates/mun_syntax/src/parsing/lexer/classes.rs
+++ b/crates/mun_syntax/src/parsing/lexer/classes.rs
@@ -5,20 +5,20 @@ pub fn is_whitespace(c: char) -> bool {
 }
 
 pub fn is_ident_start(c: char) -> bool {
-    (c >= 'a' && c <= 'z')
-        || (c >= 'A' && c <= 'Z')
+    ('a'..='z').contains(&c)
+        || ('A'..='Z').contains(&c)
         || c == '_'
         || (c > '\x7f' && UnicodeXID::is_xid_start(c))
 }
 
 pub fn is_ident_continue(c: char) -> bool {
-    (c >= 'a' && c <= 'z')
-        || (c >= 'A' && c <= 'Z')
-        || (c >= '0' && c <= '9')
+    ('a'..='z').contains(&c)
+        || ('A'..='Z').contains(&c)
+        || ('0'..='9').contains(&c)
         || c == '_'
         || (c > '\x7f' && UnicodeXID::is_xid_continue(c))
 }
 
 pub fn is_dec_digit(c: char) -> bool {
-    '0' <= c && c <= '9'
+    ('0'..='9').contains(&c)
 }
diff --git a/rust-toolchain b/rust-toolchain
index 9db5ea12f..7f3a46a84 100644
--- a/rust-toolchain
+++ b/rust-toolchain
@@ -1 +1 @@
-1.48.0
+1.49.0