diff --git a/lib/Configuration.ts b/lib/Configuration.ts
index ec6ebdf..7b642ad 100644
--- a/lib/Configuration.ts
+++ b/lib/Configuration.ts
@@ -8,118 +8,7 @@ export interface Configuration {
     username?: string;
     password?: string;
 
-    options?: ConnectionOptions;
+    options?: MongoDB.MongoClientOptions;
 
     [key:string]: any;
-}
-
-export interface ConnectionOptions {
-    db?: DatabaseLevelConnectionOptions;
-    server?: ServerLevelConnectionOptions;
-    replset?: ReplicasetLevelConnectionOptions;
-    mongos?: MongosLevelConnectionOptions;
-}
-
-export interface DatabaseLevelConnectionOptions {
-    /**
-     * The write concern for the operation where < 1 is no acknowledgment of write and w >= 1 or w = ‘majority’ acknowledges the write
-     */
-    w?: string | number;
-
-    /**
-     * Set the timeout for waiting for write concern to finish (combines with w option)
-     */
-    wtimeout?: number;
-
-    /**
-     * Write waits for fsync before returning
-     */
-    fsync?: boolean;
-
-    /**
-     * Write waits for journal sync before returning
-     */
-    j?: boolean;
-
-    /**
-     * The preferred read preference (ReadPreference.PRIMARY, ReadPreference.PRIMARY_PREFERRED, ReadPreference.SECONDARY, ReadPreference.SECONDARY_PREFERRED, ReadPreference.NEAREST).
-     */
-    readPreference?: string;
-
-    /**
-     * The tags object {‘loc’:‘ny’} used with the readPreference.
-     */
-    readPreferenceTags?: any;
-
-    /**
-     * Use c++ bson parser.
-     */
-    native_parser?: boolean;
-
-    /**
-     * Force server to create _id fields instead of client.
-     */
-    forceServerObjectId?: boolean;
-
-    /**
-     * Object overriding the basic ObjectID primary key generation.
-     */
-    pkFactory?: any;
-
-    /**
-     * Serialize functions.
-     */
-    serializeFunctions?: boolean;
-
-    /**
-     * Perform operations using raw bson buffers.
-     */
-    raw?: boolean;
-
-    /**
-     * Number of milliseconds between retries.
-     */
-    retryMiliseconds?: number;
-
-    /**
-     * Number of retries off connection.
-     */
-    numberOfRetries?: number;
-
-    /**
-     * Sets a cap on how many operations the driver will buffer up before giving up on getting a working connection, default is -1 which is unlimited.
-     */
-    bufferMaxEntries?: number;
-}
-
-export interface ServerLevelConnectionOptions extends BasicConnectionOptions {
-    autoReconnect?: boolean;
-}
-
-export interface ReplicasetLevelConnectionOptions extends MongosLevelConnectionOptions {
-    replicaSet?: string;
-    connectWithNoPrimary?: boolean;
-}
-
-export interface MongosLevelConnectionOptions extends BasicConnectionOptions {
-    ha?: boolean;
-    haInterval?: number;
-    secondaryAcceptableLatencyMS?: number;
-}
-
-export interface BasicConnectionOptions {
-    poolSize?: number;
-    ssl?: boolean;
-    sslValidate?: boolean;
-    sslCA?: Buffer[] | string[];
-    sslCert?: Buffer | string;
-    sslKey?: Buffer | string;
-    sslPass?: Buffer | string;
-
-    socketOptions?: {
-        noDelay?: boolean;
-        keepAlive?: number;
-        connectTimeoutMS?: number;
-        socketTimeoutMS?: number;
-    }
 }
\ No newline at end of file
diff --git a/lib/Core.ts b/lib/Core.ts
index accd409..9abf49d 100644
--- a/lib/Core.ts
+++ b/lib/Core.ts
@@ -49,7 +49,7 @@ export class Core {
         }
     }
 
-    private mongoConnectAsyc = Bluebird.promisify<MongoDB.Db, string, any>(MongoDB.MongoClient.connect);
+    private mongoConnectAsyc = Bluebird.promisify<MongoDB.Db, string, MongoDB.MongoClientOptions>(MongoDB.MongoClient.connect);
 
     private _plugins: Plugin[] = [];
     private _url: string;
@@ -165,7 +165,7 @@ export class Core {
         return Bluebird.resolve().then(() => {
             if (this._connection) return this._connection;
             if (this._connectPromise) return this._connectPromise;
-            return this._connectPromise = this.mongoConnectAsyc(this.url, this._config && this._config.options);
+            return this._connectPromise = this.mongoConnectAsyc(this.url, this._config && this._config.options || {});
         }).then((db: MongoDB.Db) => {
             return this.onConnecting(db);
         }).then(db => {