diff --git a/packages/core/src/helpers/isActive.ts b/packages/core/src/helpers/isActive.ts
index 3e6e40f7..65a9a809 100644
--- a/packages/core/src/helpers/isActive.ts
+++ b/packages/core/src/helpers/isActive.ts
@@ -2,8 +2,9 @@ import { EditorState } from 'prosemirror-state'
 import isNodeActive from './isNodeActive'
 import isMarkActive from './isMarkActive'
 import getSchemaTypeNameByName from './getSchemaTypeNameByName'
+import { AnyObject } from '../types'
 
-export default function isActive(state: EditorState, name: string | null, attributes: { [key: string ]: any } = {}): boolean {
+export default function isActive(state: EditorState, name: string | null, attributes: AnyObject = {}): boolean {
   if (!name) {
     return isNodeActive(state, null, attributes) || isMarkActive(state, null, attributes)
   }
diff --git a/packages/core/src/helpers/isMarkActive.ts b/packages/core/src/helpers/isMarkActive.ts
index 7d0729f3..168ccbcd 100644
--- a/packages/core/src/helpers/isMarkActive.ts
+++ b/packages/core/src/helpers/isMarkActive.ts
@@ -2,6 +2,7 @@ import { EditorState } from 'prosemirror-state'
 import { Mark, MarkType } from 'prosemirror-model'
 import objectIncludes from '../utilities/objectIncludes'
 import getMarkType from './getMarkType'
+import { AnyObject } from '../types'
 
 export type MarkRange = {
   mark: Mark,
@@ -12,7 +13,7 @@ export type MarkRange = {
 export default function isMarkActive(
   state: EditorState,
   typeOrName: MarkType | string | null,
-  attributes = {},
+  attributes: AnyObject = {},
 ): boolean {
   const { from, to, empty } = state.selection
   const type = typeOrName
diff --git a/packages/core/src/helpers/isNodeActive.ts b/packages/core/src/helpers/isNodeActive.ts
index 772ad47e..fe78c93b 100644
--- a/packages/core/src/helpers/isNodeActive.ts
+++ b/packages/core/src/helpers/isNodeActive.ts
@@ -2,6 +2,7 @@ import { EditorState } from 'prosemirror-state'
 import { Node, NodeType } from 'prosemirror-model'
 import objectIncludes from '../utilities/objectIncludes'
 import getNodeType from './getNodeType'
+import { AnyObject } from '../types'
 
 export type NodeRange = {
   node: Node,
@@ -12,7 +13,7 @@ export type NodeRange = {
 export default function isNodeActive(
   state: EditorState,
   typeOrName: NodeType | string | null,
-  attributes = {},
+  attributes: AnyObject = {},
 ): boolean {
   const { from, to, empty } = state.selection
   const type = typeOrName
diff --git a/packages/core/src/utilities/deleteProps.ts b/packages/core/src/utilities/deleteProps.ts
index 9085dcf0..411d4283 100644
--- a/packages/core/src/utilities/deleteProps.ts
+++ b/packages/core/src/utilities/deleteProps.ts
@@ -1,16 +1,18 @@
+import { AnyObject } from '../types'
+
 /**
  * Remove a property or an array of properties from an object
  * @param obj Object
  * @param key Key to remove
  */
-export default function deleteProps(obj: { [key: string ]: any }, propOrProps: string | string[]) {
+export default function deleteProps(obj: AnyObject, propOrProps: string | string[]) {
   const props = typeof propOrProps === 'string'
     ? [propOrProps]
     : propOrProps
 
   return Object
     .keys(obj)
-    .reduce((newObj: { [key: string ]: any }, prop) => {
+    .reduce((newObj: AnyObject, prop) => {
       if (!props.includes(prop)) {
         newObj[prop] = obj[prop]
       }
diff --git a/packages/core/src/utilities/objectIncludes.ts b/packages/core/src/utilities/objectIncludes.ts
index 141bb3d1..09e89008 100644
--- a/packages/core/src/utilities/objectIncludes.ts
+++ b/packages/core/src/utilities/objectIncludes.ts
@@ -1,9 +1,11 @@
+import { AnyObject } from '../types'
+
 /**
  * Check if object1 includes object2
  * @param object1 Object
  * @param object2 Object
  */
-export default function objectIncludes(object1: { [key: string ]: any }, object2: { [key: string ]: any }): boolean {
+export default function objectIncludes(object1: AnyObject, object2: AnyObject): boolean {
   const keys = Object.keys(object2)
 
   if (!keys.length) {