diff --git a/parser/src/graphql.pest b/parser/src/graphql.pest
index 1a7fcd5b..15fb2fc6 100644
--- a/parser/src/graphql.pest
+++ b/parser/src/graphql.pest
@@ -10,7 +10,7 @@ executable_definition = { operation_definition | fragment_definition }
 operation_definition       = { named_operation_definition | selection_set }
 named_operation_definition = { operation_type ~ name? ~ variable_definitions? ~ directives? ~ selection_set }
 variable_definitions       = { "(" ~ variable_definition* ~ ")" }
-variable_definition        = { variable ~ ":" ~ type_ ~ default_value? }
+variable_definition        = { variable ~ ":" ~ type_ ~ directives? ~ default_value? }
 
 selection_set = { "{" ~ selection+ ~ "}" }
 selection = { field | inline_fragment | fragment_spread }
@@ -86,6 +86,7 @@ directive_location = {
 	| "FRAGMENT_DEFINITION"
 	| "FRAGMENT_SPREAD"
 	| "INLINE_FRAGMENT"
+	| "VARIABLE_DEFINITION"
 	| "SCHEMA"
 	| "SCALAR"
 	| "OBJECT"
diff --git a/parser/src/parse/executable.rs b/parser/src/parse/executable.rs
index 2fc2a1e6..6ec0207d 100644
--- a/parser/src/parse/executable.rs
+++ b/parser/src/parse/executable.rs
@@ -208,6 +208,8 @@ fn parse_variable_definition(
 
     let variable = parse_variable(pairs.next().unwrap(), pc)?;
     let var_type = parse_type(pairs.next().unwrap(), pc)?;
+
+    let directives = parse_opt_directives(&mut pairs, pc)?;
     let default_value = parse_if_rule(&mut pairs, Rule::default_value, |pair| {
         parse_default_value(pair, pc)
     })?;
@@ -218,6 +220,7 @@ fn parse_variable_definition(
         VariableDefinition {
             name: variable,
             var_type,
+            directives,
             default_value,
         },
         pos,
diff --git a/parser/src/parse/service.rs b/parser/src/parse/service.rs
index 9b2c6206..fa71f235 100644
--- a/parser/src/parse/service.rs
+++ b/parser/src/parse/service.rs
@@ -323,6 +323,7 @@ fn parse_directive_definition(
                         "FRAGMENT_DEFINITION" => DirectiveLocation::FragmentDefinition,
                         "FRAGMENT_SPREAD" => DirectiveLocation::FragmentSpread,
                         "INLINE_FRAGMENT" => DirectiveLocation::InlineFragment,
+                        "VARIABLE_DEFINITION" => DirectiveLocation::VariableDefinition,
                         "SCHEMA" => DirectiveLocation::Schema,
                         "SCALAR" => DirectiveLocation::Scalar,
                         "OBJECT" => DirectiveLocation::Object,
diff --git a/parser/src/pos.rs b/parser/src/pos.rs
index 3f37e3e7..a52b062f 100644
--- a/parser/src/pos.rs
+++ b/parser/src/pos.rs
@@ -10,7 +10,7 @@ use std::str::Chars;
 /// Original position of an element in source code.
 ///
 /// You can serialize and deserialize it to the GraphQL `locations` format
-/// ([reference](https://spec.graphql.org/June2018/#sec-Errors)).
+/// ([reference](https://spec.graphql.org/October2021/#sec-Errors)).
 #[derive(PartialOrd, Ord, PartialEq, Eq, Clone, Copy, Default, Hash, Serialize, Deserialize)]
 pub struct Pos {
     /// One-based line number.
diff --git a/parser/src/types/executable.rs b/parser/src/types/executable.rs
index 88371ac1..0e70b13a 100644
--- a/parser/src/types/executable.rs
+++ b/parser/src/types/executable.rs
@@ -5,7 +5,7 @@ use async_graphql_value::{ConstValue, Name, Value};
 
 /// An executable GraphQL file or request string.
 ///
-/// [Reference](https://spec.graphql.org/June2018/#ExecutableDocument).
+/// [Reference](https://spec.graphql.org/October2021/#ExecutableDocument).
 #[derive(Debug, Clone)]
 pub struct ExecutableDocument {
     /// The operations of the document.
@@ -93,7 +93,7 @@ enum OperationsIterInner<'a> {
 
 /// A GraphQL operation, such as `mutation($content:String!) { makePost(content: $content) { id } }`.
 ///
-/// [Reference](https://spec.graphql.org/June2018/#OperationDefinition).
+/// [Reference](https://spec.graphql.org/October2021/#OperationDefinition).
 #[derive(Debug, Clone)]
 pub struct OperationDefinition {
     /// The type of operation.
@@ -108,13 +108,15 @@ pub struct OperationDefinition {
 
 /// A variable definition inside a list of variable definitions, for example `$name:String!`.
 ///
-/// [Reference](https://spec.graphql.org/June2018/#VariableDefinition).
+/// [Reference](https://spec.graphql.org/October2021/#VariableDefinition).
 #[derive(Debug, Clone)]
 pub struct VariableDefinition {
     /// The name of the variable, without the preceding `$`.
     pub name: Positioned<Name>,
     /// The type of the variable.
     pub var_type: Positioned<Type>,
+    /// The variable's directives.
+    pub directives: Vec<Positioned<Directive>>,
     /// The optional default value of the variable.
     pub default_value: Option<Positioned<ConstValue>>,
 }
@@ -139,7 +141,7 @@ impl VariableDefinition {
 
 /// A set of fields to be selected, for example `{ name age }`.
 ///
-/// [Reference](https://spec.graphql.org/June2018/#SelectionSet).
+/// [Reference](https://spec.graphql.org/October2021/#SelectionSet).
 #[derive(Debug, Default, Clone)]
 pub struct SelectionSet {
     /// The fields to be selected.
@@ -148,7 +150,7 @@ pub struct SelectionSet {
 
 /// A part of an object to be selected; a single field, a fragment spread or an inline fragment.
 ///
-/// [Reference](https://spec.graphql.org/June2018/#Selection).
+/// [Reference](https://spec.graphql.org/October2021/#Selection).
 #[derive(Debug, Clone)]
 pub enum Selection {
     /// Select a single field, such as `name` or `weightKilos: weight(unit: KILOGRAMS)`.
@@ -182,7 +184,7 @@ impl Selection {
 
 /// A field being selected on an object, such as `name` or `weightKilos: weight(unit: KILOGRAMS)`.
 ///
-/// [Reference](https://spec.graphql.org/June2018/#Field).
+/// [Reference](https://spec.graphql.org/October2021/#Field).
 #[derive(Debug, Clone)]
 pub struct Field {
     /// The optional field alias.
@@ -217,7 +219,7 @@ impl Field {
 
 /// A fragment selector, such as `... userFields`.
 ///
-/// [Reference](https://spec.graphql.org/June2018/#FragmentSpread).
+/// [Reference](https://spec.graphql.org/October2021/#FragmentSpread).
 #[derive(Debug, Clone)]
 pub struct FragmentSpread {
     /// The name of the fragment being selected.
@@ -228,7 +230,7 @@ pub struct FragmentSpread {
 
 /// An inline fragment selector, such as `... on User { name }`.
 ///
-/// [Reference](https://spec.graphql.org/June2018/#InlineFragment).
+/// [Reference](https://spec.graphql.org/October2021/#InlineFragment).
 #[derive(Debug, Clone)]
 pub struct InlineFragment {
     /// The type condition.
@@ -241,7 +243,7 @@ pub struct InlineFragment {
 
 /// The definition of a fragment, such as `fragment userFields on User { name age }`.
 ///
-/// [Reference](https://spec.graphql.org/June2018/#FragmentDefinition).
+/// [Reference](https://spec.graphql.org/October2021/#FragmentDefinition).
 #[derive(Debug, Clone)]
 pub struct FragmentDefinition {
     /// The type this fragment operates on.
@@ -254,7 +256,7 @@ pub struct FragmentDefinition {
 
 /// A type a fragment can apply to (`on` followed by the type).
 ///
-/// [Reference](https://spec.graphql.org/June2018/#TypeCondition).
+/// [Reference](https://spec.graphql.org/October2021/#TypeCondition).
 #[derive(Debug, Clone)]
 pub struct TypeCondition {
     /// The type this fragment applies to.
diff --git a/parser/src/types/mod.rs b/parser/src/types/mod.rs
index b52e35d2..151fa94f 100644
--- a/parser/src/types/mod.rs
+++ b/parser/src/types/mod.rs
@@ -4,7 +4,7 @@
 //! [`ServiceDocument`](struct.ServiceDocument.html), representing an executable GraphQL query and a
 //! GraphQL service respectively.
 //!
-//! This follows the [June 2018 edition of the GraphQL spec](https://spec.graphql.org/June2018/).
+//! This follows the [June 2018 edition of the GraphQL spec](https://spec.graphql.org/October2021/).
 
 mod executable;
 mod service;
@@ -19,7 +19,7 @@ pub use service::*;
 
 /// The type of an operation; `query`, `mutation` or `subscription`.
 ///
-/// [Reference](https://spec.graphql.org/June2018/#OperationType).
+/// [Reference](https://spec.graphql.org/October2021/#OperationType).
 #[derive(Debug, PartialEq, Eq, Copy, Clone)]
 pub enum OperationType {
     /// A query.
@@ -42,7 +42,7 @@ impl Display for OperationType {
 
 /// A GraphQL type, for example `String` or `[String!]!`.
 ///
-/// [Reference](https://spec.graphql.org/June2018/#Type).
+/// [Reference](https://spec.graphql.org/October2021/#Type).
 #[derive(Debug, PartialEq, Eq, Clone)]
 pub struct Type {
     /// The base type.
@@ -105,7 +105,7 @@ impl Display for BaseType {
 /// from [`Directive`](struct.Directive.html) in that it uses [`ConstValue`](enum.ConstValue.html)
 /// instead of [`Value`](enum.Value.html).
 ///
-/// [Reference](https://spec.graphql.org/June2018/#Directive).
+/// [Reference](https://spec.graphql.org/October2021/#Directive).
 #[derive(Debug, Clone)]
 pub struct ConstDirective {
     /// The name of the directive.
@@ -140,7 +140,7 @@ impl ConstDirective {
 
 /// A GraphQL directive, such as `@deprecated(reason: "Use the other field")`.
 ///
-/// [Reference](https://spec.graphql.org/June2018/#Directive).
+/// [Reference](https://spec.graphql.org/October2021/#Directive).
 #[derive(Debug, Clone)]
 pub struct Directive {
     /// The name of the directive.
diff --git a/parser/src/types/service.rs b/parser/src/types/service.rs
index 2a3e81f5..f5e2bcdb 100644
--- a/parser/src/types/service.rs
+++ b/parser/src/types/service.rs
@@ -5,7 +5,7 @@ use async_graphql_value::Name;
 
 /// A GraphQL file or request string defining a GraphQL service.
 ///
-/// [Reference](https://spec.graphql.org/June2018/#Document).
+/// [Reference](https://spec.graphql.org/October2021/#Document).
 #[derive(Debug, Clone)]
 pub struct ServiceDocument {
     /// The definitions of this document.
@@ -14,8 +14,8 @@ pub struct ServiceDocument {
 
 /// A definition concerning the type system of a GraphQL service.
 ///
-/// [Reference](https://spec.graphql.org/June2018/#TypeSystemDefinition). This enum also covers
-/// [extensions](https://spec.graphql.org/June2018/#TypeSystemExtension).
+/// [Reference](https://spec.graphql.org/October2021/#TypeSystemDefinition). This enum also covers
+/// [extensions](https://spec.graphql.org/October2021/#TypeSystemExtension).
 #[derive(Debug, Clone)]
 pub enum TypeSystemDefinition {
     /// The definition of the schema of the service.
@@ -28,8 +28,8 @@ pub enum TypeSystemDefinition {
 
 /// The definition of the schema in a GraphQL service.
 ///
-/// [Reference](https://spec.graphql.org/June2018/#SchemaDefinition). This also covers
-/// [extensions](https://spec.graphql.org/June2018/#SchemaExtension).
+/// [Reference](https://spec.graphql.org/October2021/#SchemaDefinition). This also covers
+/// [extensions](https://spec.graphql.org/October2021/#SchemaExtension).
 #[derive(Debug, Clone)]
 pub struct SchemaDefinition {
     /// Whether the schema is an extension of another schema.
@@ -46,8 +46,8 @@ pub struct SchemaDefinition {
 
 /// The definition of a type in a GraphQL service.
 ///
-/// [Reference](https://spec.graphql.org/June2018/#TypeDefinition). This also covers
-/// [extensions](https://spec.graphql.org/June2018/#TypeExtension).
+/// [Reference](https://spec.graphql.org/October2021/#TypeDefinition). This also covers
+/// [extensions](https://spec.graphql.org/October2021/#TypeExtension).
 #[derive(Debug, Clone)]
 pub struct TypeDefinition {
     /// Whether the type is an extension of another type.
@@ -81,7 +81,7 @@ pub enum TypeKind {
 
 /// The definition of an object type.
 ///
-/// [Reference](https://spec.graphql.org/June2018/#ObjectType).
+/// [Reference](https://spec.graphql.org/October2021/#ObjectType).
 #[derive(Debug, Clone)]
 pub struct ObjectType {
     /// The interfaces implemented by the object.
@@ -92,7 +92,7 @@ pub struct ObjectType {
 
 /// The definition of a field inside an object or interface.
 ///
-/// [Reference](https://spec.graphql.org/June2018/#FieldDefinition).
+/// [Reference](https://spec.graphql.org/October2021/#FieldDefinition).
 #[derive(Debug, Clone)]
 pub struct FieldDefinition {
     /// The description of the field.
@@ -109,7 +109,7 @@ pub struct FieldDefinition {
 
 /// The definition of an interface type.
 ///
-/// [Reference](https://spec.graphql.org/June2018/#InterfaceType).
+/// [Reference](https://spec.graphql.org/October2021/#InterfaceType).
 #[derive(Debug, Clone)]
 pub struct InterfaceType {
     /// The interfaces implemented by the interface.
@@ -120,7 +120,7 @@ pub struct InterfaceType {
 
 /// The definition of a union type.
 ///
-/// [Reference](https://spec.graphql.org/June2018/#UnionType).
+/// [Reference](https://spec.graphql.org/October2021/#UnionType).
 #[derive(Debug, Clone)]
 pub struct UnionType {
     /// The member types of the union.
@@ -129,7 +129,7 @@ pub struct UnionType {
 
 /// The definition of an enum.
 ///
-/// [Reference](https://spec.graphql.org/June2018/#EnumType).
+/// [Reference](https://spec.graphql.org/October2021/#EnumType).
 #[derive(Debug, Clone)]
 pub struct EnumType {
     /// The possible values of the enum.
@@ -138,7 +138,7 @@ pub struct EnumType {
 
 /// The definition of a value inside an enum.
 ///
-/// [Reference](https://spec.graphql.org/June2018/#EnumValueDefinition).
+/// [Reference](https://spec.graphql.org/October2021/#EnumValueDefinition).
 #[derive(Debug, Clone)]
 pub struct EnumValueDefinition {
     /// The description of the argument.
@@ -151,7 +151,7 @@ pub struct EnumValueDefinition {
 
 /// The definition of an input object.
 ///
-/// [Reference](https://spec.graphql.org/June2018/#InputObjectType).
+/// [Reference](https://spec.graphql.org/October2021/#InputObjectType).
 #[derive(Debug, Clone)]
 pub struct InputObjectType {
     /// The fields of the input object.
@@ -160,7 +160,7 @@ pub struct InputObjectType {
 
 /// The definition of an input value inside the arguments of a field.
 ///
-/// [Reference](https://spec.graphql.org/June2018/#InputValueDefinition).
+/// [Reference](https://spec.graphql.org/October2021/#InputValueDefinition).
 #[derive(Debug, Clone)]
 pub struct InputValueDefinition {
     /// The description of the argument.
@@ -177,7 +177,7 @@ pub struct InputValueDefinition {
 
 /// The definition of a directive in a service.
 ///
-/// [Reference](https://spec.graphql.org/June2018/#DirectiveDefinition).
+/// [Reference](https://spec.graphql.org/October2021/#DirectiveDefinition).
 #[derive(Debug, Clone)]
 pub struct DirectiveDefinition {
     /// The description of the directive.
@@ -192,7 +192,7 @@ pub struct DirectiveDefinition {
 
 /// Where a directive can apply to.
 ///
-/// [Reference](https://spec.graphql.org/June2018/#DirectiveLocation).
+/// [Reference](https://spec.graphql.org/October2021/#DirectiveLocation).
 #[derive(Debug, Clone, Copy, PartialEq, Eq)]
 pub enum DirectiveLocation {
     /// A [query](enum.OperationType.html#variant.Query) [operation](struct.OperationDefinition.html).
@@ -233,4 +233,6 @@ pub enum DirectiveLocation {
     /// An [input value definition](struct.InputValueDefinition.html) on an input object but not a
     /// field.
     InputFieldDefinition,
+    /// An [variable definition](struct.VariableDefinition.html).
+    VariableDefinition,
 }
diff --git a/parser/tests/executables/variable_directive.graphql b/parser/tests/executables/variable_directive.graphql
new file mode 100644
index 00000000..b6a9d07b
--- /dev/null
+++ b/parser/tests/executables/variable_directive.graphql
@@ -0,0 +1,3 @@
+query Foo($a: Int @directive = 10, $b: Int @directive) {
+    value
+}
diff --git a/parser/tests/services/directive.graphql b/parser/tests/services/directive.graphql
index 401b6f43..456904bd 100644
--- a/parser/tests/services/directive.graphql
+++ b/parser/tests/services/directive.graphql
@@ -4,3 +4,5 @@ directive @test1(service: String!) on FIELD_DEFINITION
 directive @test2(service: String!) on FIELD
 directive @test3(service: String!) on ENUM_VALUE
 directive @test4(service: String!) on ENUM
+
+directive @test5(service: String!) on VARIABLE_DEFINITION