diff --git a/twix/twix.d.ts b/twix/twix.d.ts
index e82df73be..4c52fbc79 100644
--- a/twix/twix.d.ts
+++ b/twix/twix.d.ts
@@ -9,33 +9,33 @@ declare module moment {
     interface Moment {
         twix(date: Date): Twix;
         twix(date: Date, allDay: boolean): Twix;
-        twix(date: Date, options: TwixFormatOptions): Twix;
-        twix(date: Date, format: string, options: TwixFormatOptions): Twix;
+        twix(date: Date, options: TwixParseAndFormatOptions): Twix;
+        twix(date: Date, format: string, options: TwixParseAndFormatOptions): Twix;
 
         twix(date: Moment): Twix;
         twix(date: Moment, allDay: boolean): Twix;
-        twix(date: Moment, options: TwixFormatOptions): Twix;
-        twix(date: Moment, format: string, options: TwixFormatOptions): Twix;
+        twix(date: Moment, options: TwixParseAndFormatOptions): Twix;
+        twix(date: Moment, format: string, options: TwixParseAndFormatOptions): Twix;
 
         twix(date: MomentInput): Twix;
         twix(date: MomentInput, allDay: boolean): Twix;
-        twix(date: MomentInput, options: TwixFormatOptions): Twix;
-        twix(date: MomentInput, format: string, options: TwixFormatOptions): Twix;
+        twix(date: MomentInput, options: TwixParseAndFormatOptions): Twix;
+        twix(date: MomentInput, format: string, options: TwixParseAndFormatOptions): Twix;
 
         twix(date: number): Twix;
         twix(date: number, allDay: boolean): Twix;
-        twix(date: number, options: TwixFormatOptions): Twix;
-        twix(date: number, format: string, options: TwixFormatOptions): Twix;
+        twix(date: number, options: TwixParseAndFormatOptions): Twix;
+        twix(date: number, format: string, options: TwixParseAndFormatOptions): Twix;
 
         twix(date: number[]): Twix;
         twix(date: number[], allDay: boolean): Twix;
-        twix(date: number[], options: TwixFormatOptions): Twix;
-        twix(date: number[], format: string, options: TwixFormatOptions): Twix;
+        twix(date: number[], options: TwixParseAndFormatOptions): Twix;
+        twix(date: number[], format: string, options: TwixParseAndFormatOptions): Twix;
 
         twix(date: string): Twix;
         twix(date: string, allDay: boolean): Twix;
-        twix(date: string, options: TwixFormatOptions): Twix;
-        twix(date: string, format: string, options: TwixFormatOptions): Twix;
+        twix(date: string, options: TwixParseAndFormatOptions): Twix;
+        twix(date: string, format: string, options: TwixParseAndFormatOptions): Twix;
     }
 
     interface MomentStatic {
@@ -63,6 +63,10 @@ declare module moment {
         lastNightEndsAt?: number;
     }
 
+    interface TwixParseAndFormatOptions extends TwixFormatOptions {
+        parseStrict?: boolean;
+    }
+
     interface TwixSimpleFormatOptions {
         allDay?: string;
         template?: (left: any, right: any) => any;