diff --git a/src/buildActions/index.js b/src/buildActions/index.js
index de2d987..120a10e 100644
--- a/src/buildActions/index.js
+++ b/src/buildActions/index.js
@@ -1,16 +1,15 @@
 import fp from 'lodash/fp';
-import { ActionEffects, ActionCreator, ActionCreators, ActionMutations } from '../types';
 
-function actionFor(type: string) {
+function actionFor(type) {
   return ( (payload = undefined, meta = undefined) =>
     fp.pickBy(v => v !== null)({type, payload, meta})
-  ) as ActionCreator;
+  );
 }
 
 export default function buildActions(
-  mutations : ActionMutations = {},
-  effects : ActionEffects = {},
-  subActions : ActionCreators = {},
+  mutations = {},
+  effects = {},
+  subActions = {},
 ) {
 
   return { ...subActions,
diff --git a/src/buildCreateStore.js b/src/buildCreateStore.js
index f2d6034..76654ba 100644
--- a/src/buildCreateStore.js
+++ b/src/buildCreateStore.js
@@ -12,6 +12,6 @@ export default function buildCreateStore( reducer, initial, middleware,
           };
       }
 
-      return store as any;
+      return store;
   }
 };
diff --git a/src/buildInitial/index.js b/src/buildInitial/index.js
index b3bf588..7df345e 100644
--- a/src/buildInitial/index.js
+++ b/src/buildInitial/index.js
@@ -1,8 +1,8 @@
 import fp from 'lodash/fp';
 
-export default function buildInitial<S = any>(
-  initial: any = {},
+export default function buildInitial(
+  initial= {},
   subduxes = {},
-): S {
+) {
   return fp.isPlainObject(initial) ? fp.mergeAll([subduxes, initial]) : initial;
 }
diff --git a/src/buildInitial/index.test-d.js b/src/buildInitial/index.test-d.js
index 39abd06..e69de29 100644
--- a/src/buildInitial/index.test-d.js
+++ b/src/buildInitial/index.test-d.js
@@ -1,6 +0,0 @@
-// TypeScript Version: 3.4
-
-import buildInitial from '.';
-
-// $ExpectType any
-const x = buildInitial();
diff --git a/src/buildInitial/test-d.js b/src/buildInitial/test-d.js
index 68893f3..e69de29 100644
--- a/src/buildInitial/test-d.js
+++ b/src/buildInitial/test-d.js
@@ -1,14 +0,0 @@
-import buildInitial from '.';
-import {expectType} from 'tsd';
-
-type MyState = {
-    foo: number,
-    bar: string,
-};
-
-const x = buildInitial<MyState>({
-    initial: {
-        glug: 3,
-    }
-});
-expectType<MyState>(x);
diff --git a/src/buildMiddleware/index.test-d.js b/src/buildMiddleware/index.test-d.js
deleted file mode 100644
index 36cc0de..0000000
--- a/src/buildMiddleware/index.test-d.js
+++ /dev/null
@@ -1,6 +0,0 @@
-import buildMiddleware from '../buildMiddleware';
-import {expectType} from 'tsd';
-
-
-expectType<any>( buildMiddleware );
-
diff --git a/src/buildMutations/index.js b/src/buildMutations/index.js
index 3e26f1e..f7dab81 100644
--- a/src/buildMutations/index.js
+++ b/src/buildMutations/index.js
@@ -1,25 +1,23 @@
 import fp from 'lodash/fp';
 import u from 'updeep';
 
-import { Mutation, Mutations } from '../types';
-
-const composeMutations = (mutations:Mutation[]) =>
+const composeMutations = (mutations) =>
     mutations.reduce( (m1,m2) =>
         (payload=null,action={}) => state => m2(payload,action)(
             m1(payload,action)(state) ));
 
-export default function buildMutations(mutations = {}, subduxes= {}) :Mutations{
+export default function buildMutations(mutations = {}, subduxes= {}) {
   // we have to differentiate the subduxes with '*' than those
   // without, as the root '*' is not the same as any sub-'*'
 
     const actions = fp.uniq( Object.keys(mutations).concat(
-        ...Object.values( subduxes ).map( ({mutations = {}}:any) => Object.keys(mutations) )
+        ...Object.values( subduxes ).map( ({mutations = {}}) => Object.keys(mutations) )
     ) );
 
     let mergedMutations = {};
 
     let [ globby, nonGlobby ] = fp.partition(
-        ([_,{mutations={}}]:any) => mutations['*'],
+        ([_,{mutations={}}]) => mutations['*'],
         Object.entries(subduxes)
     );
 
@@ -32,16 +30,16 @@ export default function buildMutations(mutations = {}, subduxes= {}) :Mutations{
         ])(globby);
 
     const globbyMutation = (payload,action) => u(
-        fp.mapValues( (mut:any) => mut(payload,action) )(globby)
+        fp.mapValues( (mut) => mut(payload,action) )(globby)
     );
 
     actions.forEach( action => {
         mergedMutations[action] = [ globbyMutation ]
     });
 
-    nonGlobby.forEach( ([slice, {mutations={},reducer={}}]:any) => {
+    nonGlobby.forEach( ([slice, {mutations={},reducer={}}]) => {
         Object.entries(mutations).forEach(([type,mutation]) => {
-            const localized = (payload=null,action={}) => u.updateIn( slice )( (mutation as any)(payload,action) );
+            const localized = (payload=null,action={}) => u.updateIn( slice )( (mutation)(payload,action) );
 
             mergedMutations[type].push(localized);
         })
@@ -51,5 +49,5 @@ export default function buildMutations(mutations = {}, subduxes= {}) :Mutations{
             mergedMutations[type].push(mutation);
     });
 
-    return fp.mapValues( composeMutations )(mergedMutations) as Mutations;
+    return fp.mapValues( composeMutations )(mergedMutations);
 }
diff --git a/src/buildUpreducer/index.js b/src/buildUpreducer/index.js
index 1c121ab..52724f6 100644
--- a/src/buildUpreducer/index.js
+++ b/src/buildUpreducer/index.js
@@ -1,18 +1,15 @@
 import fp from 'lodash/fp';
-import {Mutations} from '../types';
 
-type Upreducer = <S>(action:any) => (state:S) => S;
-
-export default function buildUpreducer<S>(initial: S, mutations: Mutations): Upreducer {
-  return (action = {}) => (state:any) => {
+export default function buildUpreducer(initial, mutations) {
+  return (action = {}) => (state) => {
     if (state === null) state = initial;
 
     const a =
-      mutations[(action as any).type] ||
+      mutations[(action).type] ||
       mutations['*'];
 
     if(!a) return state;
 
-    return a((action as any).payload, action)(state) as S;
+    return a((action).payload, action)(state);
   };
 }
diff --git a/src/index.js b/src/index.js
index b04ab06..ffdb8d5 100644
--- a/src/index.js
+++ b/src/index.js
@@ -1,7 +1,6 @@
 import fp from 'lodash/fp';
 import u from 'updeep';
 
-export { Updux } from './updux';
 import Updux from './updux';
 
 export default function updux(config) {
diff --git a/src/index.test-d.js b/src/index.test-d.js
deleted file mode 100644
index a46be7c..0000000
--- a/src/index.test-d.js
+++ /dev/null
@@ -1,5 +0,0 @@
-import updux, {Updux } from '.';
-import {expectType} from 'tsd';
-
-const x = updux({});
-expectType<Updux>(x);
diff --git a/src/types.js b/src/types.js
deleted file mode 100644
index dbf1eb2..0000000
--- a/src/types.js
+++ /dev/null
@@ -1,23 +0,0 @@
-
-export type Dictionary<T> = { [key: string]: T };
-
-export type Mutation = (payload: any, action: any) => (state:any) => any;
-
-export type Mutations = Dictionary<Mutation>;
-
-export type ActionMutations = Dictionary<Mutation>;
-
-export type Effect = (api:any) => (next: Function) => (action: any) => any;
-
-export type ActionEffects = Dictionary<Effect>;
-
-export type Action<T = string, P = any, M = any> = {
-    type: T,
-    payload: P,
-    meta: M,
-}
-
-export type ActionCreator = <P,M>(payload?: P, meta?: M ) => Action<string,P,M>;
-
-export type ActionCreators = Dictionary<ActionCreator>;
-
diff --git a/src/updux.js b/src/updux.js
index 0b780bf..08a0b31 100644
--- a/src/updux.js
+++ b/src/updux.js
@@ -3,42 +3,17 @@ import buildActions from './buildActions';
 import buildInitial from './buildInitial';
 import buildMutations from './buildMutations';
 
-import { Dictionary, Mutation, ActionCreators } from './types';
 import buildCreateStore from './buildCreateStore';
 import buildMiddleware from './buildMiddleware';
 import buildUpreducer from './buildUpreducer';
 
-type UpduxConfig = {
-    initial?: any,
-    mutations?: any,
-    effects?: any,
-    subduxes?: {
-        [ slice: string ]: UpduxConfig | Updux
-    }
-};
-
 export class Updux {
-    actions: ActionCreators;
 
-    subduxes: Dictionary<Updux>;
-
-    initial: any;
-
-    mutations: Dictionary<Mutation>;
-
-    createStore: Function;
-
-    upreducer: (action:any)=>(state:any)=>any;
-
-    reducer: <S>(state:S,action:any) => S;
-
-    middleware: (api:any) => (next: Function) => (action: any) => any;
-
-    constructor(config: UpduxConfig) {
+    constructor(config) {
 
         this.subduxes = fp.mapValues(
-            value => fp.isPlainObject(value) ? new Updux(value as UpduxConfig) : value )(fp.getOr({},'subduxes',config)
-        ) as Dictionary<Updux>;
+            value => fp.isPlainObject(value) ? new Updux(value ) : value )(fp.getOr({},'subduxes',config)
+        );
 
 
         this.actions = buildActions(