diff --git a/rrule/rrule.d.ts b/rrule/rrule.d.ts
index d7e38129a0..a86a37c8c7 100644
--- a/rrule/rrule.d.ts
+++ b/rrule/rrule.d.ts
@@ -17,7 +17,7 @@ declare namespace RRule {
         freq: any; // Should be enum
         dtstart?: Date;
         interval?: number;
-        wkst?: number // | day enum
+        wkst?: number | Weekday
         count?: number;
         until?: Date;
         bysetpos?: number;
@@ -31,11 +31,15 @@ declare namespace RRule {
         bysecond?: number;
     }
 
-    interface Weekday {
-        new (n: number): Weekday;
+    class Weekday {
+        constructor(weekday: number, n: number);
+
         nth(n: number): Weekday;
+
         equals(other: Weekday): boolean;
+
         toString(): string;
+        
         getJsWeekday(): number;
     }
 
@@ -114,15 +118,25 @@ declare class RRule {
 
 declare namespace RRule {
 
-    const FREQUENCIES: ['YEARLY' | 'MONTHLY' | 'WEEKLY' | 'DAILY' | 'HOURLY' | 'MINUTELY' | 'SECONDLY'];
+    const FREQUENCIES: "YEARLY" | "MONTHLY" | "WEEKLY" | "DAILY" | "HOURLY" | "MINUTELY" | "SECONDLY";
 
-    const YEARLY: number;
-    const MONTHLY: number;
-    const WEEKLY: number;
-    const DAILY: number;
-    const HOURLY: number;
-    const MINUTELY: number;
-    const SECONDLY: number;
+    enum Frequency {
+        YEARLY      = 0,
+        MONTHLY     = 1,
+        WEEKLY      = 2,
+        DAILY       = 3,
+        HOURLY      = 4,
+        MINUTELY    = 5,
+        SECONDLY    = 6
+    }
+    
+    const YEARLY: Frequency;
+    const MONTHLY: Frequency;
+    const WEEKLY: Frequency;
+    const DAILY: Frequency;
+    const HOURLY: Frequency;
+    const MINUTELY: Frequency;
+    const SECONDLY: Frequency;
 
     const MO: Weekday;
     const TU: Weekday;
@@ -144,106 +158,4 @@ declare namespace RRule {
 
     function fromString(value: string): RRule;
 
-    class RRuleSet {
-        constructor(noCache?: boolean);
-
-        /**
-        * @param {RRule}
-        */
-        rrule(rrule: RRule): void;
-
-        /**
-        * @param {Date}
-        */
-        rdate(date: Date): void;
-    
-        /**
-        * @param {RRule}
-        */
-        exrule(rrule: RRule): void;
-
-        /**
-        * @param {Date}
-        */
-        exdate(date: Date): void;
-            
-        valueOf(): string;
-
-        /**
-        * to generate recurrence field sush as:
-        *   ["RRULE:FREQ=YEARLY;COUNT=2;BYDAY=TU;DTSTART=19970902T010000Z","RRULE:FREQ=YEARLY;COUNT=1;BYDAY=TH;DTSTART=19970902T010000Z"]
-        */
-        toString(): string;
-            
-        /**
-        * Create a new RRuleSet Object completely base on current instance
-        */
-        clone(): RRuleSet;
-
-        /**
-        * Returns the first recurrence after the given datetime instance.
-        * The inc keyword defines what happens if dt is an occurrence.
-        * With inc == True, if dt itself is an occurrence, it will be returned.
-        * @return Date or null
-        */
-        after(dt: Date, inc?: boolean): Date;
-
-        /**
-        * @param {Function} iterator - optional function that will be called
-        *                   on each date that is added. It can return false
-        *                   to stop the iteration.
-        * @return Array containing all recurrences.
-        */
-        all(iterator?: (date: Date) => void): Date[]
-
-        /**
-        * Returns all the occurrences of the rrule between after and before.
-        * The inc keyword defines what happens if after and/or before are
-        * themselves occurrences. With inc == True, they will be included in the
-        * list, if they are found in the recurrence set.
-        * @return Array
-        */
-        between(a: Date, b: Date, iterator?: (date: Date) => void): Date[];
-
-        /**
-        * Returns the last recurrence before the given datetime instance.
-        * The inc keyword defines what happens if dt is an occurrence.
-        * With inc == True, if dt itself is an occurrence, it will be returned.
-        * @return Date or null
-        */
-        before(dt: Date, inc?: boolean): Date;
-
-        /**
-        * Returns the number of recurrences in this set. It will have go trough
-        * the whole recurrence, if this hasn't been done before.
-        */
-        count(): number;
-
-    }
-
-    /**
-    * RRuleStr
-    *  To parse a set of rrule strings
-    */
-    class RRuleString {
-        constructor();
-        parse(s: string, options: RRuleString.Options): RRuleSet | RRule;
-    }
-
-    namespace RRuleString {
-        interface Options {
-            dtstart: Date;
-            cache: boolean;
-            unfold: boolean;
-            forceset: boolean;
-            compatible: boolean;
-            ignoretz: boolean;
-            tzinfos: any;
-        } 
-
-        const DEFAULT_OPTIONS: Options;
-    }
-
-    const rrulestr: RRuleString;
-
 }