diff --git a/packages/reason-css-parser/ppx/Generate.re b/packages/reason-css-parser/ppx/Generate.re
index 3e8ee8818..9565c98cc 100644
--- a/packages/reason-css-parser/ppx/Generate.re
+++ b/packages/reason-css-parser/ppx/Generate.re
@@ -1,12 +1,10 @@
-open Ppxlib;
-
-module Ast_helper = Ppxlib.Ast_helper;
-
-module Make = (Ast_builder: Ppxlib.Ast_builder.S) => {
-  open Ast_builder;
+module Make = (Builder: Ppxlib.Ast_builder.S) => {
+  module Ast_helper = Ppxlib_ast.Ast_helper;
+  open Ppxlib;
+  open Builder;
   open Css_spec_parser;
 
-  let txt = txt => {Location.loc: Ast_builder.loc, txt};
+  let txt = txt => {Location.loc: Builder.loc, txt};
 
   let kebab_case_to_snake_case = name =>
     name |> String.split_on_char('-') |> String.concat("_");
@@ -248,11 +246,8 @@ module Make = (Ast_builder: Ppxlib.Ast_builder.S) => {
 
   /* TODO: Move this to Standard and use as ppx_runtime */
   let standard_types = {
-    open Ppxlib.Ast_builder.Default;
-
     let type_ = (~kind=Parsetree.Ptype_abstract, name, core_type) => {
-      type_declaration(
-        ~loc=Location.none,
+      Builder.type_declaration(
         ~name={txt: name, loc: Location.none},
         ~params=[],
         ~cstrs=[],
@@ -417,8 +412,7 @@ module Make = (Ast_builder: Ppxlib.Ast_builder.S) => {
     };
   };
 
-  let add_types = (~loc, bindings) => {
-    open Ppxlib;
+  let add_types = (~loc, bindings): list(Ppxlib.structure_item) => {
     let new_bindings =
       bindings
       |> List.map(value_binding => {
@@ -438,7 +432,7 @@ module Make = (Ast_builder: Ppxlib.Ast_builder.S) => {
   let create_variant_name = (type_name, name) =>
     type_name ++ "__make__" ++ name;
 
-  let txt = txt => {Location.loc: Ast_builder.loc, txt};
+  let txt = txt => {Location.loc: Builder.loc, txt};
 
   let construct = (~expr=None, name) =>
     pexp_construct(txt(Lident(name)), expr);
diff --git a/packages/reason-css-parser/ppx/Reason_css_parser_ppx.re b/packages/reason-css-parser/ppx/Reason_css_parser_ppx.re
index 32ff32ce4..5413fb37c 100644
--- a/packages/reason-css-parser/ppx/Reason_css_parser_ppx.re
+++ b/packages/reason-css-parser/ppx/Reason_css_parser_ppx.re
@@ -6,7 +6,7 @@ let expander =
       ~recursive,
       ~loc as exprLoc,
       ~path as _: string,
-      ~arg as _: option(loc(Ppxlib.Longident.t)),
+      ~arg as _: option(loc(Longident.t)),
       value: string,
       _,
       _,
@@ -14,7 +14,7 @@ let expander =
   switch (Css_spec_parser.value_of_string(value)) {
   | Some(value: Css_spec_parser.value) =>
     module Ast_builder =
-      Ppxlib.Ast_builder.Make({
+      Ast_builder.Make({
         let loc = exprLoc;
       });
     module Emit = Generate.Make(Ast_builder);