diff --git a/crates/ra_hir/src/diagnostics.rs b/crates/ra_hir/src/diagnostics.rs
index 4b7b2dbee7..2557ef18e3 100644
--- a/crates/ra_hir/src/diagnostics.rs
+++ b/crates/ra_hir/src/diagnostics.rs
@@ -87,7 +87,7 @@ impl Diagnostic for NoSuchField {
     fn syntax_node_ptr(&self) -> SyntaxNodePtr {
         self.field.into()
     }
-    fn as_any(&self) -> &(Any + Send + 'static) {
+    fn as_any(&self) -> &(dyn Any + Send + 'static) {
         self
     }
 }
@@ -109,7 +109,7 @@ impl Diagnostic for UnresolvedModule {
     fn syntax_node_ptr(&self) -> SyntaxNodePtr {
         self.decl.into()
     }
-    fn as_any(&self) -> &(Any + Send + 'static) {
+    fn as_any(&self) -> &(dyn Any + Send + 'static) {
         self
     }
 }
diff --git a/crates/ra_mbe/src/syntax_bridge.rs b/crates/ra_mbe/src/syntax_bridge.rs
index 9d3d2ad5bc..cb039ca376 100644
--- a/crates/ra_mbe/src/syntax_bridge.rs
+++ b/crates/ra_mbe/src/syntax_bridge.rs
@@ -47,7 +47,7 @@ pub fn syntax_node_to_token_tree(node: &SyntaxNode) -> Option<(tt::Subtree, Toke
 
 fn token_tree_to_syntax_node<F>(tt: &tt::Subtree, f: F) -> Result<TreeArc<SyntaxNode>, ExpandError>
 where
-    F: Fn(&mut ra_parser::TokenSource, &mut ra_parser::TreeSink),
+    F: Fn(&mut dyn ra_parser::TokenSource, &mut dyn ra_parser::TreeSink),
 {
     let tokens = [tt.clone().into()];
     let buffer = TokenBuffer::new(&tokens);
diff --git a/crates/ra_syntax/src/parsing/lexer/numbers.rs b/crates/ra_syntax/src/parsing/lexer/numbers.rs
index 7f6abe1d5c..874fb8b320 100644
--- a/crates/ra_syntax/src/parsing/lexer/numbers.rs
+++ b/crates/ra_syntax/src/parsing/lexer/numbers.rs
@@ -16,7 +16,7 @@ pub(crate) fn scan_number(c: char, ptr: &mut Ptr) -> SyntaxKind {
                 ptr.bump();
                 scan_digits(ptr, true);
             }
-            '0'...'9' | '_' | '.' | 'e' | 'E' => {
+            '0'..='9' | '_' | '.' | 'e' | 'E' => {
                 scan_digits(ptr, true);
             }
             _ => return INT_NUMBER,
@@ -47,10 +47,10 @@ pub(crate) fn scan_number(c: char, ptr: &mut Ptr) -> SyntaxKind {
 fn scan_digits(ptr: &mut Ptr, allow_hex: bool) {
     while let Some(c) = ptr.current() {
         match c {
-            '_' | '0'...'9' => {
+            '_' | '0'..='9' => {
                 ptr.bump();
             }
-            'a'...'f' | 'A'...'F' if allow_hex => {
+            'a'..='f' | 'A'..='F' if allow_hex => {
                 ptr.bump();
             }
             _ => return,