diff --git a/src/wonka.d.ts b/src/wonka.d.ts
index 5a6b525..e3c3620 100644
--- a/src/wonka.d.ts
+++ b/src/wonka.d.ts
@@ -13,11 +13,19 @@ export const map: <A, B>(f: (value: A) => B) => Operator<A, B>;
 export const filter: <A>(f: (value: A) => boolean) => Operator<A, A>;
 export const scan: <A, B>(f: (acc: B, value: A) => B, acc: B) => Operator<A, B>;
 
+export const mergeMap: <A, B>(f: (value: A) => Source<B>) => Operator<A, B>;
+export const switchMap: <A, B>(f: (value: A) => Source<B>) => Operator<A, B>;
+export const concatMap: <A, B>(f: (value: A) => Source<B>) => Operator<A, B>;
+
 export const merge: <A>(sources: Array<Source<A>>) => Source<A>;
 export const concat: <A>(sources: Array<Source<A>>) => Source<A>;
 export const share: <A>(source: Source<A>) => Source<A>;
 export const combine: <A, B>(a: Source<A>, b: Source<B>) => Source<[A, B]>;
 
+export const concatAll: <A>(source: Source<Source<A>>) => Source<A>;
+export const mergeAll: <A>(source: Source<Source<A>>) => Source<A>;
+export const flatten: <A>(source: Source<Source<A>>) => Source<A>;
+
 export const take: <A>(max: number) => Operator<A, A>;
 export const takeLast: <A>(max: number) => Operator<A, A>;
 export const takeWhile: <A>(f: (x: A) => boolean) => Operator<A, A>;
@@ -26,7 +34,5 @@ export const skip: <A>(max: number) => Operator<A, A>;
 export const skipWhile: <A>(f: (value: A) => boolean) => Operator<A, A>;
 export const skipUntil: <A>(signal: Source<any>) => Operator<A, A>;
 
-export const flatten: <A>(source: Source<Source<A>>) => Source<A>;
-
 export const forEach: <A>(f: (x: A) => void) => (source: Source<A>) => void;
 export const subscribe: <A>(f: (x: A) => void) => (source: Source<A>) => (() => void);