diff --git a/keyserver/flow-typed/npm/react-redux_v7.x.x.js b/keyserver/flow-typed/npm/react-redux_v7.x.x.js
--- a/keyserver/flow-typed/npm/react-redux_v7.x.x.js
+++ b/keyserver/flow-typed/npm/react-redux_v7.x.x.js
@@ -47,7 +47,7 @@
     storeKey?: string,
   |};
 
-  declare type MapStateToProps<-S, -OP, +SP> =
+  declare type MapStateToProps<S, OP, SP> =
     | ((state: S, ownProps: OP) => SP)
     // If you want to use the factory function but get a strange error
     // like "function is not an object" then just type the factory function
@@ -58,7 +58,7 @@
 
   declare type Bind<D> = <A, R>((...A) => R) => (...A) => $Call<D, R>;
 
-  declare type MapDispatchToPropsFn<D, -OP, +DP> =
+  declare type MapDispatchToPropsFn<D, OP, DP> =
     | ((dispatch: D, ownProps: OP) => DP)
     // If you want to use the factory function but get a strange error
     // like "function is not an object" then just type the factory function
@@ -90,14 +90,14 @@
   declare type MergeOPDP<OP, DP> = {| ...$Exact<OP>, ...DP |};
   declare type MergeOPSPDP<OP, SP, DP> = {| ...$Exact<OP>, ...SP, ...DP |};
 
-  declare export function connect<-P, -OP, -SP, -DP, -S, -D>(
+  declare export function connect<P, OP, SP, DP, S, D>(
     mapStateToProps?: null | void,
     mapDispatchToProps?: null | void,
     mergeProps?: null | void,
     options?: ?Options<S, OP, {||}, MergeOP<OP, D>>,
   ): Connector<P, OP, MergeOP<OP, D>>;
 
-  declare export function connect<-P, -OP, -SP, -DP, -S, -D>(
+  declare export function connect<P, OP, SP, DP, S, D>(
     // If you get error here try adding return type to your mapStateToProps function
     mapStateToProps: MapStateToProps<S, OP, SP>,
     mapDispatchToProps?: null | void,
@@ -107,7 +107,7 @@
 
   // In this case DP is an object of functions which has been bound to dispatch
   // by the given mapDispatchToProps function.
-  declare export function connect<-P, -OP, -SP, -DP, S, D>(
+  declare export function connect<P, OP, SP, DP, S, D>(
     mapStateToProps: null | void,
     mapDispatchToProps: MapDispatchToPropsFn<D, OP, DP>,
     mergeProps?: null | void,
@@ -117,14 +117,14 @@
   // In this case DP is an object of action creators not yet bound to dispatch,
   // this difference is not important in the vanila redux,
   // but in case of usage with redux-thunk, the return type may differ.
-  declare export function connect<-P, -OP, -SP, -DP, S, D>(
+  declare export function connect<P, OP, SP, DP, S, D>(
     mapStateToProps: null | void,
     mapDispatchToProps: DP,
     mergeProps?: null | void,
     options?: ?Options<S, OP, {||}, MergeOPDP<OP, DP>>,
   ): Connector<P, OP, MergeOPDP<OP, $ObjMap<DP, Bind<D>>>>;
 
-  declare export function connect<-P, -OP, -SP, -DP, S, D>(
+  declare export function connect<P, OP, SP, DP, S, D>(
     // If you get error here try adding return type to your mapStateToProps function
     mapStateToProps: MapStateToProps<S, OP, SP>,
     mapDispatchToProps: MapDispatchToPropsFn<D, OP, DP>,
@@ -132,7 +132,7 @@
     options?: ?Options<S, OP, SP, {| ...OP, ...SP, ...DP |}>,
   ): Connector<P, OP, {| ...OP, ...SP, ...DP |}>;
 
-  declare export function connect<-P, -OP, -SP, -DP, S, D>(
+  declare export function connect<P, OP, SP, DP, S, D>(
     // If you get error here try adding return type to your mapStateToProps function
     mapStateToProps: MapStateToProps<S, OP, SP>,
     mapDispatchToProps: DP,
@@ -142,13 +142,13 @@
 
   // With `mergeProps` argument
 
-  declare type MergeProps<+P, -OP, -SP, -DP> = (
+  declare type MergeProps<P, OP, SP, DP> = (
     stateProps: SP,
     dispatchProps: DP,
     ownProps: OP,
   ) => P;
 
-  declare export function connect<-P, -OP, -SP: {||}, -DP: {||}, S, D>(
+  declare export function connect<P, OP, SP: {||}, DP: {||}, S, D>(
     mapStateToProps: null | void,
     mapDispatchToProps: null | void,
     // If you get error here try adding return type to you mapStateToProps function
@@ -156,7 +156,7 @@
     options?: ?Options<S, OP, {||}, P>,
   ): Connector<P, OP, P>;
 
-  declare export function connect<-P, -OP, -SP, -DP: {||}, S, D>(
+  declare export function connect<P, OP, SP, DP: {||}, S, D>(
     mapStateToProps: MapStateToProps<S, OP, SP>,
     mapDispatchToProps: null | void,
     // If you get error here try adding return type to you mapStateToProps function
@@ -166,7 +166,7 @@
 
   // In this case DP is an object of functions which has been bound to dispatch
   // by the given mapDispatchToProps function.
-  declare export function connect<-P, -OP, -SP: {||}, -DP, S, D>(
+  declare export function connect<P, OP, SP: {||}, DP, S, D>(
     mapStateToProps: null | void,
     mapDispatchToProps: MapDispatchToPropsFn<D, OP, DP>,
     mergeProps: MergeProps<P, OP, {||}, DP>,
@@ -176,7 +176,7 @@
   // In this case DP is an object of action creators not yet bound to dispatch,
   // this difference is not important in the vanila redux,
   // but in case of usage with redux-thunk, the return type may differ.
-  declare export function connect<-P, -OP, -SP: {||}, -DP, S, D>(
+  declare export function connect<P, OP, SP: {||}, DP, S, D>(
     mapStateToProps: null | void,
     mapDispatchToProps: DP,
     mergeProps: MergeProps<P, OP, {||}, $ObjMap<DP, Bind<D>>>,
@@ -185,7 +185,7 @@
 
   // In this case DP is an object of functions which has been bound to dispatch
   // by the given mapDispatchToProps function.
-  declare export function connect<-P, -OP, -SP, -DP, S, D>(
+  declare export function connect<P, OP, SP, DP, S, D>(
     mapStateToProps: MapStateToProps<S, OP, SP>,
     mapDispatchToProps: MapDispatchToPropsFn<D, OP, DP>,
     mergeProps: MergeProps<P, OP, SP, DP>,
@@ -195,7 +195,7 @@
   // In this case DP is an object of action creators not yet bound to dispatch,
   // this difference is not important in the vanila redux,
   // but in case of usage with redux-thunk, the return type may differ.
-  declare export function connect<-P, -OP, -SP, -DP, S, D>(
+  declare export function connect<P, OP, SP, DP, S, D>(
     mapStateToProps: MapStateToProps<S, OP, SP>,
     mapDispatchToProps: DP,
     mergeProps: MergeProps<P, OP, SP, $ObjMap<DP, Bind<D>>>,
diff --git a/lib/flow-typed/npm/react-redux_v7.x.x.js b/lib/flow-typed/npm/react-redux_v7.x.x.js
--- a/lib/flow-typed/npm/react-redux_v7.x.x.js
+++ b/lib/flow-typed/npm/react-redux_v7.x.x.js
@@ -47,7 +47,7 @@
     storeKey?: string,
   |};
 
-  declare type MapStateToProps<-S, -OP, +SP> =
+  declare type MapStateToProps<S, OP, SP> =
     | ((state: S, ownProps: OP) => SP)
     // If you want to use the factory function but get a strange error
     // like "function is not an object" then just type the factory function
@@ -58,7 +58,7 @@
 
   declare type Bind<D> = <A, R>((...A) => R) => (...A) => $Call<D, R>;
 
-  declare type MapDispatchToPropsFn<D, -OP, +DP> =
+  declare type MapDispatchToPropsFn<D, OP, DP> =
     | ((dispatch: D, ownProps: OP) => DP)
     // If you want to use the factory function but get a strange error
     // like "function is not an object" then just type the factory function
@@ -90,14 +90,14 @@
   declare type MergeOPDP<OP, DP> = {| ...$Exact<OP>, ...DP |};
   declare type MergeOPSPDP<OP, SP, DP> = {| ...$Exact<OP>, ...SP, ...DP |};
 
-  declare export function connect<-P, -OP, -SP, -DP, -S, -D>(
+  declare export function connect<P, OP, SP, DP, S, D>(
     mapStateToProps?: null | void,
     mapDispatchToProps?: null | void,
     mergeProps?: null | void,
     options?: ?Options<S, OP, {||}, MergeOP<OP, D>>,
   ): Connector<P, OP, MergeOP<OP, D>>;
 
-  declare export function connect<-P, -OP, -SP, -DP, -S, -D>(
+  declare export function connect<P, OP, SP, DP, S, D>(
     // If you get error here try adding return type to your mapStateToProps function
     mapStateToProps: MapStateToProps<S, OP, SP>,
     mapDispatchToProps?: null | void,
@@ -107,7 +107,7 @@
 
   // In this case DP is an object of functions which has been bound to dispatch
   // by the given mapDispatchToProps function.
-  declare export function connect<-P, -OP, -SP, -DP, S, D>(
+  declare export function connect<P, OP, SP, DP, S, D>(
     mapStateToProps: null | void,
     mapDispatchToProps: MapDispatchToPropsFn<D, OP, DP>,
     mergeProps?: null | void,
@@ -117,14 +117,14 @@
   // In this case DP is an object of action creators not yet bound to dispatch,
   // this difference is not important in the vanila redux,
   // but in case of usage with redux-thunk, the return type may differ.
-  declare export function connect<-P, -OP, -SP, -DP, S, D>(
+  declare export function connect<P, OP, SP, DP, S, D>(
     mapStateToProps: null | void,
     mapDispatchToProps: DP,
     mergeProps?: null | void,
     options?: ?Options<S, OP, {||}, MergeOPDP<OP, DP>>,
   ): Connector<P, OP, MergeOPDP<OP, $ObjMap<DP, Bind<D>>>>;
 
-  declare export function connect<-P, -OP, -SP, -DP, S, D>(
+  declare export function connect<P, OP, SP, DP, S, D>(
     // If you get error here try adding return type to your mapStateToProps function
     mapStateToProps: MapStateToProps<S, OP, SP>,
     mapDispatchToProps: MapDispatchToPropsFn<D, OP, DP>,
@@ -132,7 +132,7 @@
     options?: ?Options<S, OP, SP, {| ...OP, ...SP, ...DP |}>,
   ): Connector<P, OP, {| ...OP, ...SP, ...DP |}>;
 
-  declare export function connect<-P, -OP, -SP, -DP, S, D>(
+  declare export function connect<P, OP, SP, DP, S, D>(
     // If you get error here try adding return type to your mapStateToProps function
     mapStateToProps: MapStateToProps<S, OP, SP>,
     mapDispatchToProps: DP,
@@ -142,13 +142,13 @@
 
   // With `mergeProps` argument
 
-  declare type MergeProps<+P, -OP, -SP, -DP> = (
+  declare type MergeProps<P, OP, SP, DP> = (
     stateProps: SP,
     dispatchProps: DP,
     ownProps: OP,
   ) => P;
 
-  declare export function connect<-P, -OP, -SP: {||}, -DP: {||}, S, D>(
+  declare export function connect<P, OP, SP: {||}, DP: {||}, S, D>(
     mapStateToProps: null | void,
     mapDispatchToProps: null | void,
     // If you get error here try adding return type to you mapStateToProps function
@@ -156,7 +156,7 @@
     options?: ?Options<S, OP, {||}, P>,
   ): Connector<P, OP, P>;
 
-  declare export function connect<-P, -OP, -SP, -DP: {||}, S, D>(
+  declare export function connect<P, OP, SP, DP: {||}, S, D>(
     mapStateToProps: MapStateToProps<S, OP, SP>,
     mapDispatchToProps: null | void,
     // If you get error here try adding return type to you mapStateToProps function
@@ -166,7 +166,7 @@
 
   // In this case DP is an object of functions which has been bound to dispatch
   // by the given mapDispatchToProps function.
-  declare export function connect<-P, -OP, -SP: {||}, -DP, S, D>(
+  declare export function connect<P, OP, SP: {||}, DP, S, D>(
     mapStateToProps: null | void,
     mapDispatchToProps: MapDispatchToPropsFn<D, OP, DP>,
     mergeProps: MergeProps<P, OP, {||}, DP>,
@@ -176,7 +176,7 @@
   // In this case DP is an object of action creators not yet bound to dispatch,
   // this difference is not important in the vanila redux,
   // but in case of usage with redux-thunk, the return type may differ.
-  declare export function connect<-P, -OP, -SP: {||}, -DP, S, D>(
+  declare export function connect<P, OP, SP: {||}, DP, S, D>(
     mapStateToProps: null | void,
     mapDispatchToProps: DP,
     mergeProps: MergeProps<P, OP, {||}, $ObjMap<DP, Bind<D>>>,
@@ -185,7 +185,7 @@
 
   // In this case DP is an object of functions which has been bound to dispatch
   // by the given mapDispatchToProps function.
-  declare export function connect<-P, -OP, -SP, -DP, S, D>(
+  declare export function connect<P, OP, SP, DP, S, D>(
     mapStateToProps: MapStateToProps<S, OP, SP>,
     mapDispatchToProps: MapDispatchToPropsFn<D, OP, DP>,
     mergeProps: MergeProps<P, OP, SP, DP>,
@@ -195,7 +195,7 @@
   // In this case DP is an object of action creators not yet bound to dispatch,
   // this difference is not important in the vanila redux,
   // but in case of usage with redux-thunk, the return type may differ.
-  declare export function connect<-P, -OP, -SP, -DP, S, D>(
+  declare export function connect<P, OP, SP, DP, S, D>(
     mapStateToProps: MapStateToProps<S, OP, SP>,
     mapDispatchToProps: DP,
     mergeProps: MergeProps<P, OP, SP, $ObjMap<DP, Bind<D>>>,
diff --git a/lib/flow-typed/npm/tcomb_v3.x.x.js b/lib/flow-typed/npm/tcomb_v3.x.x.js
--- a/lib/flow-typed/npm/tcomb_v3.x.x.js
+++ b/lib/flow-typed/npm/tcomb_v3.x.x.js
@@ -117,7 +117,7 @@
       codomain: TType<T>,
       name?: string,
     ): TDict<{ [key: S]: T }>,
-    union<+T>(types: $ReadOnlyArray<TType<T>>, name?: string): TUnion<T>,
+    union<T>(types: $ReadOnlyArray<TType<T>>, name?: string): TUnion<T>,
     +enums: {
       of(enums: $ReadOnlyArray<string> | $ReadOnlyArray<number>, name?: string): TEnums,
     },
diff --git a/native/flow-typed/npm/react-redux_v7.x.x.js b/native/flow-typed/npm/react-redux_v7.x.x.js
--- a/native/flow-typed/npm/react-redux_v7.x.x.js
+++ b/native/flow-typed/npm/react-redux_v7.x.x.js
@@ -47,7 +47,7 @@
     storeKey?: string,
   |};
 
-  declare type MapStateToProps<-S, -OP, +SP> =
+  declare type MapStateToProps<S, OP, SP> =
     | ((state: S, ownProps: OP) => SP)
     // If you want to use the factory function but get a strange error
     // like "function is not an object" then just type the factory function
@@ -58,7 +58,7 @@
 
   declare type Bind<D> = <A, R>((...A) => R) => (...A) => $Call<D, R>;
 
-  declare type MapDispatchToPropsFn<D, -OP, +DP> =
+  declare type MapDispatchToPropsFn<D, OP, DP> =
     | ((dispatch: D, ownProps: OP) => DP)
     // If you want to use the factory function but get a strange error
     // like "function is not an object" then just type the factory function
@@ -90,14 +90,14 @@
   declare type MergeOPDP<OP, DP> = {| ...$Exact<OP>, ...DP |};
   declare type MergeOPSPDP<OP, SP, DP> = {| ...$Exact<OP>, ...SP, ...DP |};
 
-  declare export function connect<-P, -OP, -SP, -DP, -S, -D>(
+  declare export function connect<P, OP, SP, DP, S, D>(
     mapStateToProps?: null | void,
     mapDispatchToProps?: null | void,
     mergeProps?: null | void,
     options?: ?Options<S, OP, {||}, MergeOP<OP, D>>,
   ): Connector<P, OP, MergeOP<OP, D>>;
 
-  declare export function connect<-P, -OP, -SP, -DP, -S, -D>(
+  declare export function connect<P, OP, SP, DP, S, D>(
     // If you get error here try adding return type to your mapStateToProps function
     mapStateToProps: MapStateToProps<S, OP, SP>,
     mapDispatchToProps?: null | void,
@@ -107,7 +107,7 @@
 
   // In this case DP is an object of functions which has been bound to dispatch
   // by the given mapDispatchToProps function.
-  declare export function connect<-P, -OP, -SP, -DP, S, D>(
+  declare export function connect<P, OP, SP, DP, S, D>(
     mapStateToProps: null | void,
     mapDispatchToProps: MapDispatchToPropsFn<D, OP, DP>,
     mergeProps?: null | void,
@@ -117,14 +117,14 @@
   // In this case DP is an object of action creators not yet bound to dispatch,
   // this difference is not important in the vanila redux,
   // but in case of usage with redux-thunk, the return type may differ.
-  declare export function connect<-P, -OP, -SP, -DP, S, D>(
+  declare export function connect<P, OP, SP, DP, S, D>(
     mapStateToProps: null | void,
     mapDispatchToProps: DP,
     mergeProps?: null | void,
     options?: ?Options<S, OP, {||}, MergeOPDP<OP, DP>>,
   ): Connector<P, OP, MergeOPDP<OP, $ObjMap<DP, Bind<D>>>>;
 
-  declare export function connect<-P, -OP, -SP, -DP, S, D>(
+  declare export function connect<P, OP, SP, DP, S, D>(
     // If you get error here try adding return type to your mapStateToProps function
     mapStateToProps: MapStateToProps<S, OP, SP>,
     mapDispatchToProps: MapDispatchToPropsFn<D, OP, DP>,
@@ -132,7 +132,7 @@
     options?: ?Options<S, OP, SP, {| ...OP, ...SP, ...DP |}>,
   ): Connector<P, OP, {| ...OP, ...SP, ...DP |}>;
 
-  declare export function connect<-P, -OP, -SP, -DP, S, D>(
+  declare export function connect<P, OP, SP, DP, S, D>(
     // If you get error here try adding return type to your mapStateToProps function
     mapStateToProps: MapStateToProps<S, OP, SP>,
     mapDispatchToProps: DP,
@@ -142,13 +142,13 @@
 
   // With `mergeProps` argument
 
-  declare type MergeProps<+P, -OP, -SP, -DP> = (
+  declare type MergeProps<P, OP, SP, DP> = (
     stateProps: SP,
     dispatchProps: DP,
     ownProps: OP,
   ) => P;
 
-  declare export function connect<-P, -OP, -SP: {||}, -DP: {||}, S, D>(
+  declare export function connect<P, OP, SP: {||}, DP: {||}, S, D>(
     mapStateToProps: null | void,
     mapDispatchToProps: null | void,
     // If you get error here try adding return type to you mapStateToProps function
@@ -156,7 +156,7 @@
     options?: ?Options<S, OP, {||}, P>,
   ): Connector<P, OP, P>;
 
-  declare export function connect<-P, -OP, -SP, -DP: {||}, S, D>(
+  declare export function connect<P, OP, SP, DP: {||}, S, D>(
     mapStateToProps: MapStateToProps<S, OP, SP>,
     mapDispatchToProps: null | void,
     // If you get error here try adding return type to you mapStateToProps function
@@ -166,7 +166,7 @@
 
   // In this case DP is an object of functions which has been bound to dispatch
   // by the given mapDispatchToProps function.
-  declare export function connect<-P, -OP, -SP: {||}, -DP, S, D>(
+  declare export function connect<P, OP, SP: {||}, DP, S, D>(
     mapStateToProps: null | void,
     mapDispatchToProps: MapDispatchToPropsFn<D, OP, DP>,
     mergeProps: MergeProps<P, OP, {||}, DP>,
@@ -176,7 +176,7 @@
   // In this case DP is an object of action creators not yet bound to dispatch,
   // this difference is not important in the vanila redux,
   // but in case of usage with redux-thunk, the return type may differ.
-  declare export function connect<-P, -OP, -SP: {||}, -DP, S, D>(
+  declare export function connect<P, OP, SP: {||}, DP, S, D>(
     mapStateToProps: null | void,
     mapDispatchToProps: DP,
     mergeProps: MergeProps<P, OP, {||}, $ObjMap<DP, Bind<D>>>,
@@ -185,7 +185,7 @@
 
   // In this case DP is an object of functions which has been bound to dispatch
   // by the given mapDispatchToProps function.
-  declare export function connect<-P, -OP, -SP, -DP, S, D>(
+  declare export function connect<P, OP, SP, DP, S, D>(
     mapStateToProps: MapStateToProps<S, OP, SP>,
     mapDispatchToProps: MapDispatchToPropsFn<D, OP, DP>,
     mergeProps: MergeProps<P, OP, SP, DP>,
@@ -195,7 +195,7 @@
   // In this case DP is an object of action creators not yet bound to dispatch,
   // this difference is not important in the vanila redux,
   // but in case of usage with redux-thunk, the return type may differ.
-  declare export function connect<-P, -OP, -SP, -DP, S, D>(
+  declare export function connect<P, OP, SP, DP, S, D>(
     mapStateToProps: MapStateToProps<S, OP, SP>,
     mapDispatchToProps: DP,
     mergeProps: MergeProps<P, OP, SP, $ObjMap<DP, Bind<D>>>,
diff --git a/web/flow-typed/npm/react-redux_v7.x.x.js b/web/flow-typed/npm/react-redux_v7.x.x.js
--- a/web/flow-typed/npm/react-redux_v7.x.x.js
+++ b/web/flow-typed/npm/react-redux_v7.x.x.js
@@ -47,7 +47,7 @@
     storeKey?: string,
   |};
 
-  declare type MapStateToProps<-S, -OP, +SP> =
+  declare type MapStateToProps<S, OP, SP> =
     | ((state: S, ownProps: OP) => SP)
     // If you want to use the factory function but get a strange error
     // like "function is not an object" then just type the factory function
@@ -58,7 +58,7 @@
 
   declare type Bind<D> = <A, R>((...A) => R) => (...A) => $Call<D, R>;
 
-  declare type MapDispatchToPropsFn<D, -OP, +DP> =
+  declare type MapDispatchToPropsFn<D, OP, DP> =
     | ((dispatch: D, ownProps: OP) => DP)
     // If you want to use the factory function but get a strange error
     // like "function is not an object" then just type the factory function
@@ -90,14 +90,14 @@
   declare type MergeOPDP<OP, DP> = {| ...$Exact<OP>, ...DP |};
   declare type MergeOPSPDP<OP, SP, DP> = {| ...$Exact<OP>, ...SP, ...DP |};
 
-  declare export function connect<-P, -OP, -SP, -DP, -S, -D>(
+  declare export function connect<P, OP, SP, DP, S, D>(
     mapStateToProps?: null | void,
     mapDispatchToProps?: null | void,
     mergeProps?: null | void,
     options?: ?Options<S, OP, {||}, MergeOP<OP, D>>,
   ): Connector<P, OP, MergeOP<OP, D>>;
 
-  declare export function connect<-P, -OP, -SP, -DP, -S, -D>(
+  declare export function connect<P, OP, SP, DP, S, D>(
     // If you get error here try adding return type to your mapStateToProps function
     mapStateToProps: MapStateToProps<S, OP, SP>,
     mapDispatchToProps?: null | void,
@@ -107,7 +107,7 @@
 
   // In this case DP is an object of functions which has been bound to dispatch
   // by the given mapDispatchToProps function.
-  declare export function connect<-P, -OP, -SP, -DP, S, D>(
+  declare export function connect<P, OP, SP, DP, S, D>(
     mapStateToProps: null | void,
     mapDispatchToProps: MapDispatchToPropsFn<D, OP, DP>,
     mergeProps?: null | void,
@@ -117,14 +117,14 @@
   // In this case DP is an object of action creators not yet bound to dispatch,
   // this difference is not important in the vanila redux,
   // but in case of usage with redux-thunk, the return type may differ.
-  declare export function connect<-P, -OP, -SP, -DP, S, D>(
+  declare export function connect<P, OP, SP, DP, S, D>(
     mapStateToProps: null | void,
     mapDispatchToProps: DP,
     mergeProps?: null | void,
     options?: ?Options<S, OP, {||}, MergeOPDP<OP, DP>>,
   ): Connector<P, OP, MergeOPDP<OP, $ObjMap<DP, Bind<D>>>>;
 
-  declare export function connect<-P, -OP, -SP, -DP, S, D>(
+  declare export function connect<P, OP, SP, DP, S, D>(
     // If you get error here try adding return type to your mapStateToProps function
     mapStateToProps: MapStateToProps<S, OP, SP>,
     mapDispatchToProps: MapDispatchToPropsFn<D, OP, DP>,
@@ -132,7 +132,7 @@
     options?: ?Options<S, OP, SP, {| ...OP, ...SP, ...DP |}>,
   ): Connector<P, OP, {| ...OP, ...SP, ...DP |}>;
 
-  declare export function connect<-P, -OP, -SP, -DP, S, D>(
+  declare export function connect<P, OP, SP, DP, S, D>(
     // If you get error here try adding return type to your mapStateToProps function
     mapStateToProps: MapStateToProps<S, OP, SP>,
     mapDispatchToProps: DP,
@@ -142,13 +142,13 @@
 
   // With `mergeProps` argument
 
-  declare type MergeProps<+P, -OP, -SP, -DP> = (
+  declare type MergeProps<P, OP, SP, DP> = (
     stateProps: SP,
     dispatchProps: DP,
     ownProps: OP,
   ) => P;
 
-  declare export function connect<-P, -OP, -SP: {||}, -DP: {||}, S, D>(
+  declare export function connect<P, OP, SP: {||}, DP: {||}, S, D>(
     mapStateToProps: null | void,
     mapDispatchToProps: null | void,
     // If you get error here try adding return type to you mapStateToProps function
@@ -156,7 +156,7 @@
     options?: ?Options<S, OP, {||}, P>,
   ): Connector<P, OP, P>;
 
-  declare export function connect<-P, -OP, -SP, -DP: {||}, S, D>(
+  declare export function connect<P, OP, SP, DP: {||}, S, D>(
     mapStateToProps: MapStateToProps<S, OP, SP>,
     mapDispatchToProps: null | void,
     // If you get error here try adding return type to you mapStateToProps function
@@ -166,7 +166,7 @@
 
   // In this case DP is an object of functions which has been bound to dispatch
   // by the given mapDispatchToProps function.
-  declare export function connect<-P, -OP, -SP: {||}, -DP, S, D>(
+  declare export function connect<P, OP, SP: {||}, DP, S, D>(
     mapStateToProps: null | void,
     mapDispatchToProps: MapDispatchToPropsFn<D, OP, DP>,
     mergeProps: MergeProps<P, OP, {||}, DP>,
@@ -176,7 +176,7 @@
   // In this case DP is an object of action creators not yet bound to dispatch,
   // this difference is not important in the vanila redux,
   // but in case of usage with redux-thunk, the return type may differ.
-  declare export function connect<-P, -OP, -SP: {||}, -DP, S, D>(
+  declare export function connect<P, OP, SP: {||}, DP, S, D>(
     mapStateToProps: null | void,
     mapDispatchToProps: DP,
     mergeProps: MergeProps<P, OP, {||}, $ObjMap<DP, Bind<D>>>,
@@ -185,7 +185,7 @@
 
   // In this case DP is an object of functions which has been bound to dispatch
   // by the given mapDispatchToProps function.
-  declare export function connect<-P, -OP, -SP, -DP, S, D>(
+  declare export function connect<P, OP, SP, DP, S, D>(
     mapStateToProps: MapStateToProps<S, OP, SP>,
     mapDispatchToProps: MapDispatchToPropsFn<D, OP, DP>,
     mergeProps: MergeProps<P, OP, SP, DP>,
@@ -195,7 +195,7 @@
   // In this case DP is an object of action creators not yet bound to dispatch,
   // this difference is not important in the vanila redux,
   // but in case of usage with redux-thunk, the return type may differ.
-  declare export function connect<-P, -OP, -SP, -DP, S, D>(
+  declare export function connect<P, OP, SP, DP, S, D>(
     mapStateToProps: MapStateToProps<S, OP, SP>,
     mapDispatchToProps: DP,
     mergeProps: MergeProps<P, OP, SP, $ObjMap<DP, Bind<D>>>,