diff --git a/types/mongodb/index.d.ts b/types/mongodb/index.d.ts
index 08aeceb5d8..dd4f44f38a 100644
--- a/types/mongodb/index.d.ts
+++ b/types/mongodb/index.d.ts
@@ -1457,8 +1457,8 @@ export interface ChangeStreamOptions {
 type GridFSBucketWriteStreamId = string | number | Object | ObjectID;
                
 export interface LoggerOptions {
-    loggerLevel: string // Custom logger function
-    logger: log // Override default global log level.
+    loggerLevel?: string // Custom logger function
+    logger?: log // Override default global log level.
 }
 
 export type log = (message?: string, state?: LoggerState) => void
@@ -1473,7 +1473,7 @@ export interface LoggerState {
 
 /** http://mongodb.github.io/node-mongodb-native/3.0/api/Logger.html */
 export class Logger{
-    constructor(className: string,options: LoggerOptions)
+    constructor(className: string, options?: LoggerOptions)
     // Log a message at the debug level
     debug(message: string, state: LoggerState):void
     // Log a message at the warn level
@@ -1497,7 +1497,7 @@ export class Logger{
     //Set the current logger function
     static setCurrentLogger(log: log):void
     // Set what classes to log.
-    static filter(type: string,values: string[]):void
+    static filter(type: string, values: string[]):void
     // Set the current log level
     static setLevel(level: string):void
 }