diff --git a/src/utilities/getIntrospectionQuery.d.ts b/src/utilities/getIntrospectionQuery.d.ts
index 6e5fad16e6..fd550ad36c 100644
--- a/src/utilities/getIntrospectionQuery.d.ts
+++ b/src/utilities/getIntrospectionQuery.d.ts
@@ -31,6 +31,7 @@ export interface IntrospectionQuery {
 }
 
 export interface IntrospectionSchema {
+  readonly description?: Maybe<string>;
   readonly queryType: IntrospectionNamedTypeRef<IntrospectionObjectType>;
   readonly mutationType: Maybe<
     IntrospectionNamedTypeRef<IntrospectionObjectType>
@@ -131,25 +132,25 @@ export interface IntrospectionNonNullTypeRef<
 
 export type IntrospectionTypeRef =
   | IntrospectionNamedTypeRef
-  | IntrospectionListTypeRef<any>
+  | IntrospectionListTypeRef
   | IntrospectionNonNullTypeRef<
-      IntrospectionNamedTypeRef | IntrospectionListTypeRef<any>
+      IntrospectionNamedTypeRef | IntrospectionListTypeRef
     >;
 
 export type IntrospectionOutputTypeRef =
   | IntrospectionNamedTypeRef<IntrospectionOutputType>
-  | IntrospectionListTypeRef<any>
+  | IntrospectionListTypeRef<IntrospectionOutputTypeRef>
   | IntrospectionNonNullTypeRef<
       | IntrospectionNamedTypeRef<IntrospectionOutputType>
-      | IntrospectionListTypeRef<any>
+      | IntrospectionListTypeRef<IntrospectionOutputTypeRef>
     >;
 
 export type IntrospectionInputTypeRef =
   | IntrospectionNamedTypeRef<IntrospectionInputType>
-  | IntrospectionListTypeRef<any>
+  | IntrospectionListTypeRef<IntrospectionInputTypeRef>
   | IntrospectionNonNullTypeRef<
       | IntrospectionNamedTypeRef<IntrospectionInputType>
-      | IntrospectionListTypeRef<any>
+      | IntrospectionListTypeRef<IntrospectionInputTypeRef>
     >;
 
 export interface IntrospectionNamedTypeRef<
@@ -165,14 +166,14 @@ export interface IntrospectionField {
   readonly args: ReadonlyArray<IntrospectionInputValue>;
   readonly type: IntrospectionOutputTypeRef;
   readonly isDeprecated: boolean;
-  readonly deprecationReason?: Maybe<string>;
+  readonly deprecationReason: Maybe<string>;
 }
 
 export interface IntrospectionInputValue {
   readonly name: string;
   readonly description?: Maybe<string>;
   readonly type: IntrospectionInputTypeRef;
-  readonly defaultValue?: Maybe<string>;
+  readonly defaultValue: Maybe<string>;
   readonly isDeprecated?: boolean;
   readonly deprecationReason?: Maybe<string>;
 }
@@ -181,7 +182,7 @@ export interface IntrospectionEnumValue {
   readonly name: string;
   readonly description?: Maybe<string>;
   readonly isDeprecated: boolean;
-  readonly deprecationReason?: Maybe<string>;
+  readonly deprecationReason: Maybe<string>;
 }
 
 export interface IntrospectionDirective {