diff --git a/README.md b/README.md
index 4c0b59a..4c8746b 100644
--- a/README.md
+++ b/README.md
@@ -23,7 +23,7 @@ Install using `npm install node-eventstore-client`
 ### Dependencies
 
 - Node.js >= 4.0
-- Modules: [long](https://www.npmjs.org/package/long), [protobufjs](https://www.npmjs.org/package/protobufjs), [uuid](https://www.npmjs.org/package/uuid) (installed via `npm install`)
+- Modules: [long](https://www.npmjs.org/package/long), [protobufjs](https://www.npmjs.org/package/protobufjs), [uuid](https://www.npmjs.org/package/uuid), [strict-event-emitter-types](https://www.npmjs.com/package/strict-event-emitter-types) (installed via `npm install`)
 
 ### Install and run an Eventstore on localhost
 
diff --git a/index.d.ts b/index.d.ts
index bed7feb..a1808f5 100644
--- a/index.d.ts
+++ b/index.d.ts
@@ -88,7 +88,7 @@ export class ProjectionsManager {
     getQuery(name: string, userCredentials: UserCredentials): Promise<string>;
     getState(name: string, userCredentials: UserCredentials): Promise<string>;
     updateQuery(name: string, query: string, userCredentials: UserCredentials): Promise<void>;
-    deleteQuery(name: string, deleteEmittedStreams: boolean, userCredentials: UserCredentials): Promise<void>;
+    delete(name: string, deleteEmittedStreams: boolean, deleteStateStream: boolean, deleteCheckpointStream: boolean, userCredentials: UserCredentials): Promise<void>;
 }
 
 // Expose errors
diff --git a/src/projections/projectionsClient.js b/src/projections/projectionsClient.js
index 6b569ee..ec86743 100644
--- a/src/projections/projectionsClient.js
+++ b/src/projections/projectionsClient.js
@@ -106,8 +106,8 @@ ProjectionsClient.prototype.updateQuery = function(httpEndPoint, name, query, us
   return this.sendPut(httpEndPoint + '/projection/' + name + '/query?type=JS', query, userCredentials, HTTP_OK);
 };
 
-ProjectionsClient.prototype.delete = function(httpEndPoint, name, deleteEmittedStreams, userCredentials) {
-  return this.sendDelete(httpEndPoint + '/projection/' + name + '?deleteEmittedStreams=' + deleteEmittedStreams, userCredentials, HTTP_OK);
+ProjectionsClient.prototype.delete = function(httpEndPoint, name, deleteEmittedStreams, deleteStateStream, deleteCheckpointStream, userCredentials) {
+  return this.sendDelete(httpEndPoint + '/projection/' + name + '?deleteStateStream=' + deleteStateStream + '&deleteCheckpointStream=' + deleteCheckpointStream + '&deleteEmittedStreams=' + deleteEmittedStreams, '', userCredentials, HTTP_OK);
 };
 
 ProjectionsClient.prototype.request = function(method, _url, data, userCredentials, expectedCode) {
diff --git a/src/projections/projectionsManager.js b/src/projections/projectionsManager.js
index 6f33ad6..da04ef2 100644
--- a/src/projections/projectionsManager.js
+++ b/src/projections/projectionsManager.js
@@ -200,13 +200,15 @@ ProjectionsManager.prototype.updateQuery = function(name, query, userCredentials
 
 /**
  * Updates the definition of a query.
- * @param name                  The name of the projection.
- * @param deleteEmittedStreams  Whether to delete the streams that were emitted by this projection.
- * @param userCredentials       Credentials for a user with permission to delete a projection.
+ * @param name                    The name of the projection.
+ * @param deleteEmittedStreams    Whether to delete the streams that were emitted by this projection.
+ * @param deleteStateStream       Where to delete the state stream for this projection
+ * @param deleteCheckpointStream  Where to delete the checkpoint stream for this projection
+ * @param userCredentials         Credentials for a user with permission to delete a projection.
  * @returns {Promise<void>}
  */
-ProjectionsManager.prototype.delete = function(name, deleteEmittedStreams, userCredentials) {
-  return this._client.delete(this._httpEndPoint, name, deleteEmittedStreams, userCredentials);
+ProjectionsManager.prototype.delete = function(name, deleteEmittedStreams, deleteStateStream, deleteCheckpointStream, userCredentials) {
+  return this._client.delete(this._httpEndPoint, name, deleteEmittedStreams, deleteStateStream, deleteCheckpointStream, userCredentials);
 };
 
 module.exports = ProjectionsManager;
\ No newline at end of file