diff --git a/types/bookshelf/bookshelf-tests.ts b/types/bookshelf/bookshelf-tests.ts
index 75d91d73df..77af31461b 100644
--- a/types/bookshelf/bookshelf-tests.ts
+++ b/types/bookshelf/bookshelf-tests.ts
@@ -867,6 +867,10 @@ model.where('favorite_color', 'red').fetch().then(() => {
 model.where({favorite_color: 'red', shoe_size: 12}).fetch().then(() => {
 	//...
 });
+// or
+model.where('favorite_color', 'in', ['red', 'green']).fetch().then(() => {
+	// ...
+});
 
 /* Lodash methods, see http://bookshelfjs.org/#Model-subsection-lodash-methods */
 
@@ -1197,6 +1201,13 @@ ships.trigger('fetched');
 
 /* collection.where(), see http://bookshelfjs.org/#Collection-instance-where */
 
+(new Author())
+	.where('first_name', 'in', ['User', 'Resu'])
+	.fetchAll()
+	.then(() => {
+		// ...
+	})
+
 /* collection.withPivot(), see http://bookshelfjs.org/#Collection-instance-withPivot */
 
 {
diff --git a/types/bookshelf/index.d.ts b/types/bookshelf/index.d.ts
index 0b22e60b69..bb817d3074 100644
--- a/types/bookshelf/index.d.ts
+++ b/types/bookshelf/index.d.ts
@@ -97,7 +97,7 @@ declare namespace Bookshelf {
 		/** @deprecated should use `new` objects instead. */
 		static forge<T>(attributes?: any, options?: ModelOptions): T;
 		static where<T>(properties: { [key: string]: any }): T;
-		static where<T>(key: string, operatorOrValue: string | number | boolean, valueIfOperator?: string | number | boolean): T;
+		static where<T>(key: string, operatorOrValue: string | number | boolean, valueIfOperator?: string | string[] | number | number[] | boolean): T;
 
 		belongsTo<R extends Model<any>>(target: { new (...args: any[]): R }, foreignKey?: string, foreignKeyTarget?: string): R;
 		belongsToMany<R extends Model<any>>(target: { new (...args: any[]): R }, table?: string, foreignKey?: string, otherKey?: string, foreignKeyTarget?: string, otherKeyTarget?: string): Collection<R>;
@@ -126,7 +126,7 @@ declare namespace Bookshelf {
 		save(attrs?: { [key: string]: any }, options?: SaveOptions): BlueBird<T>;
 		through<R extends Model<any>>(interim: ModelSubclass, throughForeignKey?: string, otherKey?: string): R;
 		where(properties: { [key: string]: any }): T;
-		where(key: string, operatorOrValue: string | number | boolean, valueIfOperator?: string | number | boolean): T;
+		where(key: string, operatorOrValue: string | number | boolean, valueIfOperator?: string | string[] | number | number[] | boolean): T;
 
 		// See https://github.com/tgriesser/bookshelf/blob/0.9.4/src/errors.js
 		// See https://github.com/tgriesser/bookshelf/blob/0.9.4/src/model.js#L1280