diff --git a/src/Utils/SchemaPrinter.php b/src/Utils/SchemaPrinter.php
index 91099d4..9c27b50 100644
--- a/src/Utils/SchemaPrinter.php
+++ b/src/Utils/SchemaPrinter.php
@@ -3,6 +3,7 @@ namespace GraphQL\Utils;
 
 use GraphQL\Language\Printer;
 use GraphQL\Schema;
+use GraphQL\Type\Definition\CompositeType;
 use GraphQL\Type\Definition\EnumType;
 use GraphQL\Type\Definition\InputObjectType;
 use GraphQL\Type\Definition\InterfaceType;
@@ -203,7 +204,7 @@ class SchemaPrinter
 
     private static function printInputObject(InputObjectType $type)
     {
-        $fields = array_values($type->getFields());
+        $fields = self::sortFields($type->getFields());
         return self::printDescription($type) . 
             "input {$type->name} {\n" .
                 implode("\n", array_map(function($f, $i) {
@@ -214,7 +215,7 @@ class SchemaPrinter
 
     private static function printFields($type)
     {
-        $fields = array_values($type->getFields());
+        $fields = self::sortFields($type->getFields());
         return implode("\n", array_map(function($f, $i) {
                 return self::printDescription($f, '  ', !$i) . '  ' .
                     $f->name . self::printArgs($f->args, '  ') . ': ' .
@@ -301,4 +302,10 @@ class SchemaPrinter
             return trim($part);
         }, $parts);
     }
+
+    private static function sortFields(array $fields)
+    {
+        ksort($fields);
+        return array_values($fields);
+    }
 }
\ No newline at end of file
diff --git a/tests/Utils/BuildSchemaTest.php b/tests/Utils/BuildSchemaTest.php
index 65e5fe5..8d09261 100644
--- a/tests/Utils/BuildSchemaTest.php
+++ b/tests/Utils/BuildSchemaTest.php
@@ -71,11 +71,11 @@ schema {
 }
 
 type HelloScalars {
-  str: String
-  int: Int
+  bool: Boolean
   float: Float
   id: ID
-  bool: Boolean
+  int: Int
+  str: String
 }
 ';
         $output = $this->cycleOutput($body);
@@ -194,11 +194,11 @@ schema {
 }
 
 type HelloScalars {
-  nonNullStr: String!
-  listOfStrs: [String]
   listOfNonNullStrs: [String!]
-  nonNullListOfStrs: [String]!
+  listOfStrs: [String]
   nonNullListOfNonNullStrs: [String!]!
+  nonNullListOfStrs: [String]!
+  nonNullStr: String!
 }
 ';
         $output = $this->cycleOutput($body);
@@ -216,8 +216,8 @@ schema {
 }
 
 type Recurse {
-  str: String
   recurse: Recurse
+  str: String
 }
 ';
         $output = $this->cycleOutput($body);
@@ -259,10 +259,10 @@ schema {
 }
 
 type Hello {
-  str(int: Int): String
+  booleanToStr(bool: Boolean): String
   floatToStr(float: Float): String
   idToStr(id: ID): String
-  booleanToStr(bool: Boolean): String
+  str(int: Int): String
   strToStr(bool: String): String
 }
 ';
@@ -479,9 +479,9 @@ schema {
 }
 
 type HelloScalars {
-  str: String
-  int: Int
   bool: Boolean
+  int: Int
+  str: String
 }
 
 type Mutation {
@@ -504,9 +504,9 @@ schema {
 }
 
 type HelloScalars {
-  str: String
-  int: Int
   bool: Boolean
+  int: Int
+  str: String
 }
 
 type Subscription {
@@ -572,9 +572,9 @@ enum MyEnum {
 }
 
 type Query {
+  enum: MyEnum
   field1: String @deprecated
   field2: Int @deprecated(reason: "Because I said so")
-  enum: MyEnum
 }
 ';
         $output = $this->cycleOutput($body);
diff --git a/tests/Utils/SchemaPrinterTest.php b/tests/Utils/SchemaPrinterTest.php
index 49314f0..55fec16 100644
--- a/tests/Utils/SchemaPrinterTest.php
+++ b/tests/Utils/SchemaPrinterTest.php
@@ -445,8 +445,8 @@ interface Baaz {
 }
 
 type Bar implements Foo, Baaz {
-  str: String
   int: Int
+  str: String
 }
 
 interface Foo {
@@ -512,8 +512,8 @@ type Foo {
 union MultipleUnion = Foo | Bar
 
 type Root {
-  single: SingleUnion
   multiple: MultipleUnion
+  single: SingleUnion
 }
 
 union SingleUnion = Foo
@@ -677,13 +677,13 @@ directive @deprecated(
 # skipping a field. Directives provide this by describing additional information
 # to the executor.
 type __Directive {
-  name: String!
+  args: [__InputValue!]!
   description: String
   locations: [__DirectiveLocation!]!
-  args: [__InputValue!]!
-  onOperation: Boolean! @deprecated(reason: "Use `locations`.")
-  onFragment: Boolean! @deprecated(reason: "Use `locations`.")
+  name: String!
   onField: Boolean! @deprecated(reason: "Use `locations`.")
+  onFragment: Boolean! @deprecated(reason: "Use `locations`.")
+  onOperation: Boolean! @deprecated(reason: "Use `locations`.")
 }
 
 # A Directive can be adjacent to many parts of the GraphQL language, a
@@ -748,53 +748,52 @@ enum __DirectiveLocation {
 # placeholder for a string or numeric value. However an Enum value is returned in
 # a JSON response as a string.
 type __EnumValue {
-  name: String!
+  deprecationReason: String
   description: String
   isDeprecated: Boolean!
-  deprecationReason: String
+  name: String!
 }
 
 # Object and Interface types are described by a list of Fields, each of which has
 # a name, potentially a list of arguments, and a return type.
 type __Field {
-  name: String!
-  description: String
   args: [__InputValue!]!
-  type: __Type!
-  isDeprecated: Boolean!
   deprecationReason: String
+  description: String
+  isDeprecated: Boolean!
+  name: String!
+  type: __Type!
 }
 
 # Arguments provided to Fields or Directives and the input fields of an
 # InputObject are represented as Input Values which describe their type and
 # optionally a default value.
 type __InputValue {
-  name: String!
-  description: String
-  type: __Type!
-
   # A GraphQL-formatted string representing the default value for this input value.
   defaultValue: String
+  description: String
+  name: String!
+  type: __Type!
 }
 
 # A GraphQL Schema defines the capabilities of a GraphQL server. It exposes all
 # available types and directives on the server, as well as the entry points for
 # query, mutation, and subscription operations.
 type __Schema {
-  # A list of all types supported by this server.
-  types: [__Type!]!
-
-  # The type that query operations will be rooted at.
-  queryType: __Type!
+  # A list of all directives supported by this server.
+  directives: [__Directive!]!
 
   # If this server supports mutation, the type that mutation operations will be rooted at.
   mutationType: __Type
 
+  # The type that query operations will be rooted at.
+  queryType: __Type!
+
   # If this server support subscription, the type that subscription operations will be rooted at.
   subscriptionType: __Type
 
-  # A list of all directives supported by this server.
-  directives: [__Directive!]!
+  # A list of all types supported by this server.
+  types: [__Type!]!
 }
 
 # The fundamental unit of any GraphQL Schema is the type. There are many kinds of
@@ -806,15 +805,15 @@ type __Schema {
 # they describe. Abstract types, Union and Interface, provide the Object types
 # possible at runtime. List and NonNull types compose other types.
 type __Type {
+  description: String
+  enumValues(includeDeprecated: Boolean = false): [__EnumValue!]
+  fields(includeDeprecated: Boolean = false): [__Field!]
+  inputFields: [__InputValue!]
+  interfaces: [__Type!]
   kind: __TypeKind!
   name: String
-  description: String
-  fields(includeDeprecated: Boolean = false): [__Field!]
-  interfaces: [__Type!]
-  possibleTypes: [__Type!]
-  enumValues(includeDeprecated: Boolean = false): [__EnumValue!]
-  inputFields: [__InputValue!]
   ofType: __Type
+  possibleTypes: [__Type!]
 }
 
 # An enum describing what kind of type a given `__Type` is.