diff --git a/src/ace.tsx b/src/ace.tsx
index 113715f0..33da53dd 100644
--- a/src/ace.tsx
+++ b/src/ace.tsx
@@ -68,10 +68,7 @@ export interface IAceEditorProps {
   [index: string]: any;
 }
 
-export default class ReactAce extends React.Component<
-  IAceEditorProps,
-  undefined
-> {
+export default class ReactAce extends React.Component<IAceEditorProps> {
   [index: string]: any;
 
   public static propTypes: PropTypes.ValidationMap<IAceEditorProps> = {
diff --git a/src/types.ts b/src/types.ts
index b8980b83..47b53532 100644
--- a/src/types.ts
+++ b/src/types.ts
@@ -10,7 +10,7 @@ export interface ICommandManager {
 }
 export interface IEditorProps {
   [index: string]: any;
-  $blockScrolling?: number;
+  $blockScrolling?: number | boolean;
   $blockSelectEnabled?: boolean;
   $enableBlockSelect?: boolean;
   $enableMultiselect?: boolean;
@@ -43,9 +43,9 @@ export interface IMarker {
   startCol: number;
   endRow: number;
   endCol: number;
-  inFront: boolean;
   className: string;
   type: string;
+  inFront?: boolean;
 }
 
 export interface ICommandBindKey {