diff --git a/Cargo.toml b/Cargo.toml
index ca816035a2a..cfb750c0a8f 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -63,6 +63,10 @@ lazy_static = "1.0.0"
 # for more information.
 rustc-workspace-hack = "1.0.0"
 
+[dependencies.rustc_ast]
+package = "rustc-ap-rustc_ast"
+version = "650.0.0"
+
 [dependencies.rustc_ast_pretty]
 package = "rustc-ap-rustc_ast_pretty"
 version = "650.0.0"
@@ -94,7 +98,3 @@ version = "650.0.0"
 [dependencies.rustc_target]
 package = "rustc-ap-rustc_target"
 version = "650.0.0"
-
-[dependencies.syntax]
-package = "rustc-ap-rustc_ast"
-version = "650.0.0"
diff --git a/src/attr.rs b/src/attr.rs
index 74195eb2a94..5221caf2fad 100644
--- a/src/attr.rs
+++ b/src/attr.rs
@@ -1,7 +1,7 @@
 //! Format attributes and meta items.
 
+use rustc_ast::ast;
 use rustc_span::{symbol::sym, BytePos, Span, DUMMY_SP};
-use syntax::ast;
 
 use self::doc_comment::DocCommentFormatter;
 use crate::comment::{contains_comment, rewrite_doc_comment, CommentStyle};
diff --git a/src/chains.rs b/src/chains.rs
index e8becfbab8a..32bcf0e0999 100644
--- a/src/chains.rs
+++ b/src/chains.rs
@@ -58,8 +58,8 @@
 use std::borrow::Cow;
 use std::cmp::min;
 
+use rustc_ast::{ast, ptr};
 use rustc_span::{BytePos, Span};
-use syntax::{ast, ptr};
 
 use crate::comment::{rewrite_comment, CharClasses, FullCodeCharKind, RichChar};
 use crate::config::IndentStyle;
diff --git a/src/closures.rs b/src/closures.rs
index 625ef4a81f9..55a96a5c68a 100644
--- a/src/closures.rs
+++ b/src/closures.rs
@@ -1,5 +1,5 @@
+use rustc_ast::{ast, ptr};
 use rustc_span::Span;
-use syntax::{ast, ptr};
 
 use crate::attr::get_attrs_from_stmt;
 use crate::config::lists::*;
diff --git a/src/expr.rs b/src/expr.rs
index 6a581e6c054..d63961449f8 100644
--- a/src/expr.rs
+++ b/src/expr.rs
@@ -2,9 +2,9 @@ use std::borrow::Cow;
 use std::cmp::min;
 
 use itertools::Itertools;
+use rustc_ast::token::{DelimToken, LitKind};
+use rustc_ast::{ast, ptr};
 use rustc_span::{BytePos, Span};
-use syntax::token::{DelimToken, LitKind};
-use syntax::{ast, ptr};
 
 use crate::chains::rewrite_chain;
 use crate::closures;
@@ -1314,7 +1314,7 @@ pub(crate) fn can_be_overflowed_expr(
         }
         ast::ExprKind::MacCall(ref mac) => {
             match (
-                syntax::ast::MacDelimiter::from_token(mac.args.delim()),
+                rustc_ast::ast::MacDelimiter::from_token(mac.args.delim()),
                 context.config.overflow_delimited_expr(),
             ) {
                 (Some(ast::MacDelimiter::Bracket), true)
diff --git a/src/formatting.rs b/src/formatting.rs
index 583d72272f2..8178342f28c 100644
--- a/src/formatting.rs
+++ b/src/formatting.rs
@@ -4,8 +4,8 @@ use std::collections::HashMap;
 use std::io::{self, Write};
 use std::time::{Duration, Instant};
 
+use rustc_ast::ast;
 use rustc_span::Span;
-use syntax::ast;
 
 use self::newline_style::apply_newline_style;
 use crate::comment::{CharClasses, FullCodeCharKind};
@@ -29,7 +29,7 @@ impl<'b, T: Write + 'b> Session<'b, T> {
             return Err(ErrorKind::VersionMismatch);
         }
 
-        syntax::with_globals(self.config.edition().to_libsyntax_pos_edition(), || {
+        rustc_ast::with_globals(self.config.edition().to_libsyntax_pos_edition(), || {
             if self.config.disable_all_formatting() {
                 // When the input is from stdin, echo back the input.
                 if let Input::Text(ref buf) = input {
diff --git a/src/imports.rs b/src/imports.rs
index 9c914ce476d..d8f963e1ec3 100644
--- a/src/imports.rs
+++ b/src/imports.rs
@@ -2,8 +2,8 @@ use std::borrow::Cow;
 use std::cmp::Ordering;
 use std::fmt;
 
+use rustc_ast::ast::{self, UseTreeKind};
 use rustc_span::{source_map, symbol::sym, BytePos, Span, DUMMY_SP};
-use syntax::ast::{self, UseTreeKind};
 
 use crate::comment::combine_strs_with_missing_comments;
 use crate::config::lists::*;
diff --git a/src/items.rs b/src/items.rs
index 04bef1cef5f..baa993590ca 100644
--- a/src/items.rs
+++ b/src/items.rs
@@ -4,9 +4,9 @@ use std::borrow::Cow;
 use std::cmp::{max, min, Ordering};
 
 use regex::Regex;
+use rustc_ast::visit;
+use rustc_ast::{ast, ptr};
 use rustc_span::{source_map, symbol, BytePos, Span, DUMMY_SP};
-use syntax::visit;
-use syntax::{ast, ptr};
 
 use crate::attr::filter_inline_attrs;
 use crate::comment::{
@@ -594,7 +594,7 @@ impl<'a> FmtVisitor<'a> {
                 self.buffer.clear();
             }
 
-            fn is_type(ty: &Option<syntax::ptr::P<ast::Ty>>) -> bool {
+            fn is_type(ty: &Option<rustc_ast::ptr::P<ast::Ty>>) -> bool {
                 match ty {
                     None => true,
                     Some(lty) => match lty.kind.opaque_top_hack() {
@@ -604,7 +604,7 @@ impl<'a> FmtVisitor<'a> {
                 }
             }
 
-            fn is_opaque(ty: &Option<syntax::ptr::P<ast::Ty>>) -> bool {
+            fn is_opaque(ty: &Option<rustc_ast::ptr::P<ast::Ty>>) -> bool {
                 match ty {
                     None => false,
                     Some(lty) => match lty.kind.opaque_top_hack() {
@@ -615,15 +615,15 @@ impl<'a> FmtVisitor<'a> {
             }
 
             fn both_type(
-                a: &Option<syntax::ptr::P<ast::Ty>>,
-                b: &Option<syntax::ptr::P<ast::Ty>>,
+                a: &Option<rustc_ast::ptr::P<ast::Ty>>,
+                b: &Option<rustc_ast::ptr::P<ast::Ty>>,
             ) -> bool {
                 is_type(a) && is_type(b)
             }
 
             fn both_opaque(
-                a: &Option<syntax::ptr::P<ast::Ty>>,
-                b: &Option<syntax::ptr::P<ast::Ty>>,
+                a: &Option<rustc_ast::ptr::P<ast::Ty>>,
+                b: &Option<rustc_ast::ptr::P<ast::Ty>>,
             ) -> bool {
                 is_opaque(a) && is_opaque(b)
             }
diff --git a/src/lib.rs b/src/lib.rs
index dbd9469908e..ecf19ebb586 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -19,7 +19,7 @@ use std::rc::Rc;
 
 use failure::Fail;
 use ignore;
-use syntax::ast;
+use rustc_ast::ast;
 
 use crate::comment::LineClasses;
 use crate::emitter::Emitter;
diff --git a/src/macros.rs b/src/macros.rs
index ffc6a7a66dc..400daa6a5aa 100644
--- a/src/macros.rs
+++ b/src/macros.rs
@@ -12,12 +12,12 @@
 use std::collections::HashMap;
 use std::panic::{catch_unwind, AssertUnwindSafe};
 
+use rustc_ast::token::{BinOpToken, DelimToken, Token, TokenKind};
+use rustc_ast::tokenstream::{Cursor, TokenStream, TokenTree};
+use rustc_ast::{ast, ptr};
 use rustc_ast_pretty::pprust;
 use rustc_parse::{new_parser_from_tts, parser::Parser};
 use rustc_span::{symbol::kw, BytePos, Span, Symbol, DUMMY_SP};
-use syntax::token::{BinOpToken, DelimToken, Token, TokenKind};
-use syntax::tokenstream::{Cursor, TokenStream, TokenTree};
-use syntax::{ast, ptr};
 
 use crate::comment::{
     contains_comment, CharClasses, FindUncommented, FullCodeCharKind, LineClasses,
diff --git a/src/matches.rs b/src/matches.rs
index 5f2d9d9e85e..c6b17122326 100644
--- a/src/matches.rs
+++ b/src/matches.rs
@@ -2,8 +2,8 @@
 
 use std::iter::repeat;
 
+use rustc_ast::{ast, ptr};
 use rustc_span::{BytePos, Span};
-use syntax::{ast, ptr};
 
 use crate::comment::{combine_strs_with_missing_comments, rewrite_comment};
 use crate::config::lists::*;
diff --git a/src/modules.rs b/src/modules.rs
index 4ea41cd14f4..9f8dabbfaf4 100644
--- a/src/modules.rs
+++ b/src/modules.rs
@@ -2,9 +2,9 @@ use std::borrow::Cow;
 use std::collections::BTreeMap;
 use std::path::{Path, PathBuf};
 
+use rustc_ast::ast;
+use rustc_ast::visit::Visitor;
 use rustc_span::symbol::{sym, Symbol};
-use syntax::ast;
-use syntax::visit::Visitor;
 
 use crate::attr::MetaVisitor;
 use crate::config::FileName;
diff --git a/src/modules/visitor.rs b/src/modules/visitor.rs
index b4d32747b17..942e70d0e88 100644
--- a/src/modules/visitor.rs
+++ b/src/modules/visitor.rs
@@ -1,6 +1,6 @@
+use rustc_ast::ast;
+use rustc_ast::visit::Visitor;
 use rustc_span::Symbol;
-use syntax::ast;
-use syntax::visit::Visitor;
 
 use crate::attr::MetaVisitor;
 use crate::syntux::parser::Parser;
diff --git a/src/overflow.rs b/src/overflow.rs
index 0ef1db20fa1..566f0e36639 100644
--- a/src/overflow.rs
+++ b/src/overflow.rs
@@ -3,9 +3,9 @@
 use std::cmp::min;
 
 use itertools::Itertools;
+use rustc_ast::token::DelimToken;
+use rustc_ast::{ast, ptr};
 use rustc_span::Span;
-use syntax::token::DelimToken;
-use syntax::{ast, ptr};
 
 use crate::closures;
 use crate::config::lists::*;
diff --git a/src/pairs.rs b/src/pairs.rs
index 45132c1f9f6..0f3d5e8f878 100644
--- a/src/pairs.rs
+++ b/src/pairs.rs
@@ -1,4 +1,4 @@
-use syntax::ast;
+use rustc_ast::ast;
 
 use crate::config::lists::*;
 use crate::config::IndentStyle;
diff --git a/src/patterns.rs b/src/patterns.rs
index 1f13fa6db60..78292620232 100644
--- a/src/patterns.rs
+++ b/src/patterns.rs
@@ -1,6 +1,6 @@
+use rustc_ast::ast::{self, BindingMode, FieldPat, Pat, PatKind, RangeEnd, RangeSyntax};
+use rustc_ast::ptr;
 use rustc_span::{BytePos, Span};
-use syntax::ast::{self, BindingMode, FieldPat, Pat, PatKind, RangeEnd, RangeSyntax};
-use syntax::ptr;
 
 use crate::comment::{combine_strs_with_missing_comments, FindUncommented};
 use crate::config::lists::*;
diff --git a/src/reorder.rs b/src/reorder.rs
index 0235e552be7..3b9f2475acc 100644
--- a/src/reorder.rs
+++ b/src/reorder.rs
@@ -8,8 +8,8 @@
 
 use std::cmp::{Ord, Ordering};
 
+use rustc_ast::{ast, attr};
 use rustc_span::{symbol::sym, Span};
-use syntax::{ast, attr};
 
 use crate::config::Config;
 use crate::imports::{merge_use_trees, UseTree};
diff --git a/src/rewrite.rs b/src/rewrite.rs
index f73602f09a2..86b2e9ded1c 100644
--- a/src/rewrite.rs
+++ b/src/rewrite.rs
@@ -3,8 +3,8 @@
 use std::cell::{Cell, RefCell};
 use std::rc::Rc;
 
+use rustc_ast::ptr;
 use rustc_span::Span;
-use syntax::ptr;
 
 use crate::config::{Config, IndentStyle};
 use crate::shape::Shape;
diff --git a/src/skip.rs b/src/skip.rs
index 4972eb8c778..fd48e67ee73 100644
--- a/src/skip.rs
+++ b/src/skip.rs
@@ -1,7 +1,7 @@
 //! Module that contains skip related stuffs.
 
+use rustc_ast::ast;
 use rustc_ast_pretty::pprust;
-use syntax::ast;
 
 /// Take care of skip name stack. You can update it by attributes slice or
 /// by other context. Query this context to know if you need skip a block.
@@ -56,7 +56,7 @@ fn get_skip_names(kind: &str, attrs: &[ast::Attribute]) -> Vec<String> {
     let mut skip_names = vec![];
     let path = format!("{}::{}::{}", RUSTFMT, SKIP, kind);
     for attr in attrs {
-        // syntax::ast::Path is implemented partialEq
+        // rustc_ast::ast::Path is implemented partialEq
         // but it is designed for segments.len() == 1
         if let ast::AttrKind::Normal(attr_item) = &attr.kind {
             if pprust::path_to_string(&attr_item.path) != path {
diff --git a/src/spanned.rs b/src/spanned.rs
index 618a8b179fd..60a350524fa 100644
--- a/src/spanned.rs
+++ b/src/spanned.rs
@@ -1,7 +1,7 @@
 use std::cmp::max;
 
+use rustc_ast::{ast, ptr};
 use rustc_span::{source_map, Span};
-use syntax::{ast, ptr};
 
 use crate::macros::MacroArg;
 use crate::utils::{mk_sp, outer_attributes};
diff --git a/src/stmt.rs b/src/stmt.rs
index 30006512906..807cd9e5fad 100644
--- a/src/stmt.rs
+++ b/src/stmt.rs
@@ -1,5 +1,5 @@
+use rustc_ast::ast;
 use rustc_span::Span;
-use syntax::ast;
 
 use crate::comment::recover_comment_removed;
 use crate::config::Version;
diff --git a/src/syntux/parser.rs b/src/syntux/parser.rs
index 91f9def15cb..04a6f7577a0 100644
--- a/src/syntux/parser.rs
+++ b/src/syntux/parser.rs
@@ -1,11 +1,11 @@
 use std::panic::{catch_unwind, AssertUnwindSafe};
 use std::path::{Path, PathBuf};
 
+use rustc_ast::ast;
+use rustc_ast::token::{DelimToken, TokenKind};
 use rustc_errors::{Diagnostic, PResult};
 use rustc_parse::{new_parser_from_file, parser::Parser as RawParser};
 use rustc_span::{symbol::kw, Span};
-use syntax::ast;
-use syntax::token::{DelimToken, TokenKind};
 
 use crate::syntux::session::ParseSess;
 use crate::{Config, Input};
@@ -121,8 +121,8 @@ impl<'a> Parser<'a> {
                 }
                 TokenKind::DocComment(s) => {
                     // we need to get the position of this token before we bump.
-                    let attr = syntax::attr::mk_doc_comment(
-                        syntax::util::comments::doc_comment_style(&s.as_str()),
+                    let attr = rustc_ast::attr::mk_doc_comment(
+                        rustc_ast::util::comments::doc_comment_style(&s.as_str()),
                         s,
                         parser.token.span,
                     );
diff --git a/src/syntux/session.rs b/src/syntux/session.rs
index 0e6b0073793..da8741c84e5 100644
--- a/src/syntux/session.rs
+++ b/src/syntux/session.rs
@@ -2,6 +2,7 @@ use std::cell::RefCell;
 use std::path::Path;
 use std::rc::Rc;
 
+use rustc_ast::ast;
 use rustc_data_structures::sync::{Lrc, Send};
 use rustc_errors::emitter::{Emitter, EmitterWriter};
 use rustc_errors::{ColorConfig, Diagnostic, Handler, Level as DiagnosticLevel};
@@ -10,7 +11,6 @@ use rustc_span::{
     source_map::{FilePathMapping, SourceMap},
     BytePos, Span,
 };
-use syntax::ast;
 
 use crate::config::file_lines::LineRange;
 use crate::ignore_path::IgnorePathSet;
diff --git a/src/types.rs b/src/types.rs
index 500ccaf6275..0708152b9ba 100644
--- a/src/types.rs
+++ b/src/types.rs
@@ -1,8 +1,8 @@
 use std::iter::ExactSizeIterator;
 use std::ops::Deref;
 
+use rustc_ast::ast::{self, FnRetTy, Mutability};
 use rustc_span::{symbol::kw, BytePos, Span};
-use syntax::ast::{self, FnRetTy, Mutability};
 
 use crate::config::lists::*;
 use crate::config::{IndentStyle, TypeDensity, Version};
@@ -551,7 +551,7 @@ impl Rewrite for ast::GenericParam {
             _ => (),
         }
 
-        if let syntax::ast::GenericParamKind::Const { ref ty } = &self.kind {
+        if let rustc_ast::ast::GenericParamKind::Const { ref ty } = &self.kind {
             result.push_str("const ");
             result.push_str(rewrite_ident(context, self.ident));
             result.push_str(": ");
diff --git a/src/utils.rs b/src/utils.rs
index 494d4d0e33f..4f62dc363dd 100644
--- a/src/utils.rs
+++ b/src/utils.rs
@@ -1,13 +1,13 @@
 use std::borrow::Cow;
 
-use rustc_ast_pretty::pprust;
-use rustc_span::{sym, BytePos, ExpnId, Span, Symbol, SyntaxContext};
-use rustc_target::spec::abi;
-use syntax::ast::{
+use rustc_ast::ast::{
     self, Attribute, CrateSugar, MetaItem, MetaItemKind, NestedMetaItem, NodeId, Path, Visibility,
     VisibilityKind,
 };
-use syntax::ptr;
+use rustc_ast::ptr;
+use rustc_ast_pretty::pprust;
+use rustc_span::{sym, BytePos, ExpnId, Span, Symbol, SyntaxContext};
+use rustc_target::spec::abi;
 use unicode_width::UnicodeWidthStr;
 
 use crate::comment::{filter_normal_code, CharClasses, FullCodeCharKind, LineClasses};
@@ -157,7 +157,7 @@ pub(crate) fn format_extern(
 }
 
 #[inline]
-// Transform `Vec<syntax::ptr::P<T>>` into `Vec<&T>`
+// Transform `Vec<rustc_ast::ptr::P<T>>` into `Vec<&T>`
 pub(crate) fn ptr_vec_to_ref_vec<T>(vec: &[ptr::P<T>]) -> Vec<&T> {
     vec.iter().map(|x| &**x).collect::<Vec<_>>()
 }
diff --git a/src/vertical.rs b/src/vertical.rs
index b932b0afa17..95d1d5c2d7e 100644
--- a/src/vertical.rs
+++ b/src/vertical.rs
@@ -3,8 +3,8 @@
 use std::cmp;
 
 use itertools::Itertools;
+use rustc_ast::ast;
 use rustc_span::{BytePos, Span};
-use syntax::ast;
 
 use crate::comment::combine_strs_with_missing_comments;
 use crate::config::lists::*;
diff --git a/src/visitor.rs b/src/visitor.rs
index 593e3ac6a21..27e4f6543b0 100644
--- a/src/visitor.rs
+++ b/src/visitor.rs
@@ -1,9 +1,9 @@
 use std::cell::{Cell, RefCell};
 use std::rc::Rc;
 
+use rustc_ast::token::DelimToken;
+use rustc_ast::{ast, visit};
 use rustc_span::{BytePos, Pos, Span};
-use syntax::token::DelimToken;
-use syntax::{ast, visit};
 
 use crate::attr::*;
 use crate::comment::{rewrite_comment, CodeCharKind, CommentCodeSlices};
diff --git a/tests/source/imports.rs b/tests/source/imports.rs
index d0bdeda595d..4dfc6ed94e3 100644
--- a/tests/source/imports.rs
+++ b/tests/source/imports.rs
@@ -3,7 +3,7 @@
 // Imports.
 
 // Long import.
-use syntax::ast::{ItemForeignMod, ItemImpl, ItemMac, ItemMod, ItemStatic, ItemDefaultImpl};
+use rustc_ast::ast::{ItemForeignMod, ItemImpl, ItemMac, ItemMod, ItemStatic, ItemDefaultImpl};
 use exceedingly::looooooooooooooooooooooooooooooooooooooooooooooooooooooooooong::import::path::{ItemA, ItemB};
 use exceedingly::loooooooooooooooooooooooooooooooooooooooooooooooooooooooong::import::path::{ItemA, ItemB};
 
@@ -15,30 +15,30 @@ use list::{
 
 use test::{  Other          /* C   */  , /*   A   */ self  /*    B     */    };
 
-use syntax::{self};
+use rustc_ast::{self};
 use {/* Pre-comment! */
      Foo, Bar /* comment */};
 use Foo::{Bar, Baz};
-pub use syntax::ast::{Expr_, Expr, ExprAssign, ExprCall, ExprMethodCall, ExprPath};
+pub use rustc_ast::ast::{Expr_, Expr, ExprAssign, ExprCall, ExprMethodCall, ExprPath};
 
-use syntax::some::{};
+use rustc_ast::some::{};
 
 use self;
 use std::io::{self};
 use std::io::self;
 
 mod Foo {
-    pub use syntax::ast::{
+    pub use rustc_ast::ast::{
         ItemForeignMod,
-        ItemImpl, 
+        ItemImpl,
         ItemMac,
         ItemMod,
-        ItemStatic, 
+        ItemStatic,
         ItemDefaultImpl
     };
 
     mod Foo2 {
-        pub use syntax::ast::{ItemForeignMod, ItemImpl, ItemMac, ItemMod, ItemStatic, self, ItemDefaultImpl};
+        pub use rustc_ast::ast::{ItemForeignMod, ItemImpl, ItemMac, ItemMod, ItemStatic, self, ItemDefaultImpl};
     }
 }
 
diff --git a/tests/target/imports.rs b/tests/target/imports.rs
index c497a375b59..87584d89f66 100644
--- a/tests/target/imports.rs
+++ b/tests/target/imports.rs
@@ -9,7 +9,7 @@ use exceedingly::loooooooooooooooooooooooooooooooooooooooooooooooooooooooong::im
 use exceedingly::looooooooooooooooooooooooooooooooooooooooooooooooooooooooooong::import::path::{
     ItemA, ItemB,
 };
-use syntax::ast::{ItemDefaultImpl, ItemForeignMod, ItemImpl, ItemMac, ItemMod, ItemStatic};
+use rustc_ast::ast::{ItemDefaultImpl, ItemForeignMod, ItemImpl, ItemMac, ItemMod, ItemStatic};
 
 use list::{
     // Another item
@@ -22,8 +22,8 @@ use list::{
 
 use test::{/* A */ self /* B */, Other /* C */};
 
-pub use syntax::ast::{Expr, ExprAssign, ExprCall, ExprMethodCall, ExprPath, Expr_};
-use syntax::{self};
+pub use rustc_ast::ast::{Expr, ExprAssign, ExprCall, ExprMethodCall, ExprPath, Expr_};
+use rustc_ast::{self};
 use Foo::{Bar, Baz};
 use {Bar /* comment */, /* Pre-comment! */ Foo};
 
@@ -31,12 +31,12 @@ use std::io;
 use std::io::{self};
 
 mod Foo {
-    pub use syntax::ast::{
+    pub use rustc_ast::ast::{
         ItemDefaultImpl, ItemForeignMod, ItemImpl, ItemMac, ItemMod, ItemStatic,
     };
 
     mod Foo2 {
-        pub use syntax::ast::{
+        pub use rustc_ast::ast::{
             self, ItemDefaultImpl, ItemForeignMod, ItemImpl, ItemMac, ItemMod, ItemStatic,
         };
     }