diff --git a/src/ColumnsDataArranger.ts b/src/ColumnsDataArranger.ts
index 853b17d..6e1e2bf 100644
--- a/src/ColumnsDataArranger.ts
+++ b/src/ColumnsDataArranger.ts
@@ -53,7 +53,7 @@ const isDateTime = (type: string): boolean => {
 /**
  * Arranges columns data before loading.
  */
-export default (arrTableColumns: any[], mysqlVersion: string|number): string => {
+export default (arrTableColumns: any[], mysqlVersion: string | number): string => {
     let strRetVal: string = '';
     const wkbFunc: string = mysqlVersion >= 5.76 ? 'ST_AsWKB' : 'AsWKB';
 
diff --git a/src/Conversion.ts b/src/Conversion.ts
index eef3b1c..665e91f 100644
--- a/src/Conversion.ts
+++ b/src/Conversion.ts
@@ -47,7 +47,7 @@ export default class Conversion {
     /**
      * V8 memory limit of the loader process.
      */
-    public _loaderMaxOldSpaceSize: number|string;
+    public _loaderMaxOldSpaceSize: number | string;
 
     /**
      * Maximal amount of simultaneous connections to your MySQL and PostgreSQL servers.
@@ -117,7 +117,7 @@ export default class Conversion {
     /**
      * Current version of source (MySQL) db.
      */
-    public _mysqlVersion: string|number;
+    public _mysqlVersion: string | number;
 
     /**
      * Node-MySQL connections pool.
@@ -187,7 +187,7 @@ export default class Conversion {
     /**
      * An EventEmitter instance.
      */
-    public _eventEmitter: EventEmitter|null;
+    public _eventEmitter: EventEmitter | null;
 
     /**
      * The data types map.