diff --git a/.vscode/settings.json b/.vscode/settings.json
index 6e086df..c9eb258 100644
--- a/.vscode/settings.json
+++ b/.vscode/settings.json
@@ -7,7 +7,7 @@
   "javascript.validate.enable": false,
   "workbench.editor.enablePreview": false,
   "workbench.editor.enablePreviewFromQuickOpen": false,
-  "workbench.editor.showTabs": true,
+  "workbench.editor.showTabs": "multiple",
   "typescript.surveys.enabled": false,
   "editor.quickSuggestions": {
     "other": true,
@@ -33,8 +33,8 @@
     "editor.formatOnSave": true
   },
   "editor.codeActionsOnSave": {
-    "source.fixAll.tslint": true,
-    "source.fixAll.eslint": true
+    "source.fixAll.tslint": "explicit",
+    "source.fixAll.eslint": "explicit"
   },
   "eslint.validate": [
     "javascript",
diff --git a/lib/root/subscriptions.js b/lib/root/subscriptions.js
index b567588..5abd449 100644
--- a/lib/root/subscriptions.js
+++ b/lib/root/subscriptions.js
@@ -23,15 +23,17 @@ function generateSubscriptions(graphqlSchemaDeclaration, types, pubSubInstance)
                 // ex: name = "userUpdated"
                 var name_1 = "".concat(modelName).concat(capitalizeFirstLetter(action), "d");
                 var configuration = declaration[action];
+                var subscriptionFunction = function () { return true; };
+                if (typeof configuration !== 'undefined' &&
+                    Object.prototype.hasOwnProperty.call(configuration, 'subscriptionFilter')) {
+                    subscriptionFunction = configuration.subscriptionFilter;
+                }
                 subscriptions[name_1] = {
                     type: outputType,
                     args: {
                         id: { type: graphql_1.GraphQLInt }
                     },
-                    subscribe: (0, graphql_subscriptions_1.withFilter)(function () { return pubSubInstance.asyncIterator(name_1); }, typeof configuration !== 'undefined' &&
-                        configuration.subscriptionFilter
-                        ? configuration.subscriptionFilter
-                        : function () { return true; })
+                    subscribe: (0, graphql_subscriptions_1.withFilter)(function () { return pubSubInstance.asyncIterator(name_1); }, subscriptionFunction)
                 };
             }
         });
diff --git a/src/associations/field.ts b/src/associations/field.ts
index 92b2744..d776893 100644
--- a/src/associations/field.ts
+++ b/src/associations/field.ts
@@ -1,11 +1,10 @@
 import {
+  GraphQLInt,
   GraphQLList,
-  GraphQLType,
   GraphQLScalarType,
   GraphQLString,
-  GraphQLInt,
+  GraphQLType,
 } from 'graphql'
-import { GraphQLField } from 'graphql/type'
 import { Association } from 'sequelize/types'
 import { injectAssociations } from '..'
 import { OutputTypes } from '../../types'
diff --git a/src/root/query.ts b/src/root/query.ts
index ac12fe3..4613df3 100644
--- a/src/root/query.ts
+++ b/src/root/query.ts
@@ -1,4 +1,4 @@
-import { GraphQLObjectType, GraphQLInt, GraphQLFieldConfig } from 'graphql'
+import { GraphQLFieldConfig, GraphQLInt, GraphQLObjectType } from 'graphql'
 import { defaultArgs, defaultListArgs } from 'graphql-sequelize'
 import {
   GlobalPreCallback,
diff --git a/src/root/subscriptions.ts b/src/root/subscriptions.ts
index 4c62288..17c7235 100644
--- a/src/root/subscriptions.ts
+++ b/src/root/subscriptions.ts
@@ -1,6 +1,12 @@
 import { GraphQLInt, GraphQLObjectType } from 'graphql'
 import { PubSub, withFilter } from 'graphql-subscriptions'
-import { GraphqlSchemaDeclarationType, EventList } from '../../types'
+import {
+  CreateFieldDeclarationType,
+  DeleteFieldDeclarationType,
+  EventList,
+  GraphqlSchemaDeclarationType,
+  UpdateFieldDeclarationType,
+} from '../../types'
 import { isGraphqlFieldDeclaration } from '../isGraphqlFieldDeclaration'
 
 const availableActions: EventList = ['create', 'update', 'delete']
@@ -34,6 +40,24 @@ export default function generateSubscriptions(
           // ex: name = "userUpdated"
           const name = `${modelName}${capitalizeFirstLetter(action)}d`
           const configuration = declaration[action]
+
+          let subscriptionFunction: any = () => true
+
+          if (
+            typeof configuration !== 'undefined' &&
+            Object.prototype.hasOwnProperty.call(
+              configuration,
+              'subscriptionFilter'
+            )
+          ) {
+            subscriptionFunction = (
+              configuration as
+                | CreateFieldDeclarationType
+                | DeleteFieldDeclarationType
+                | UpdateFieldDeclarationType
+            ).subscriptionFilter
+          }
+
           subscriptions[name] = {
             type: outputType,
             args: {
@@ -41,10 +65,7 @@ export default function generateSubscriptions(
             },
             subscribe: withFilter(
               () => pubSubInstance.asyncIterator(name),
-              typeof configuration !== 'undefined' &&
-                configuration.subscriptionFilter
-                ? configuration.subscriptionFilter
-                : () => true
+              subscriptionFunction
             ),
           }
         }
diff --git a/src/tests/schema.js b/src/tests/schema.js
index 1ddfc8a..4c89e7c 100644
--- a/src/tests/schema.js
+++ b/src/tests/schema.js
@@ -12,9 +12,8 @@ const {
 } = require('graphql')
 const { PubSub } = require('graphql-subscriptions')
 const { resolver, defaultListArgs } = require('graphql-sequelize')
-const { createContext, EXPECTED_OPTIONS_KEY } = require('dataloader-sequelize')
+const { EXPECTED_OPTIONS_KEY } = require('dataloader-sequelize')
 const { WebSocketServer } = require('ws')
-const { useServer } = require('graphql-ws/lib/use/ws')
 
 const { Op } = require('sequelize')
 const {
diff --git a/types.d.ts b/types.d.ts
index 53ce0ca..3bc020a 100644
--- a/types.d.ts
+++ b/types.d.ts
@@ -1,20 +1,20 @@
 import {
-  Model,
-  Sequelize,
-  BuildOptions,
-  FindOptions,
-  Association,
-} from 'sequelize/types'
-import {
-  GraphQLScalarType,
-  GraphQLNonNull,
-  GraphQLObjectType,
-  GraphQLInputObjectType,
-  GraphQLType,
   GraphQLFieldConfig,
   GraphQLFieldResolver,
+  GraphQLInputObjectType,
   GraphQLList,
+  GraphQLNonNull,
+  GraphQLObjectType,
+  GraphQLScalarType,
+  GraphQLType,
 } from 'graphql'
+import {
+  Association,
+  BuildOptions,
+  FindOptions,
+  Model,
+  Sequelize,
+} from 'sequelize/types'
 
 export type Action = 'list' | 'create' | 'delete' | 'update' | 'count'
 export type ActionList = Array<Action>
@@ -152,6 +152,27 @@ export type GraphqlSchemaDeclarationType = {
   [key: string]: ModelDeclarationType | GraphQLFieldConfig<any, any, any>
 }
 
+export type CreateFieldDeclarationType = {
+  extraArg?: ExtraArg
+  before?: MutationBeforeHook
+  after?: CreateAfterHook
+  subscriptionFilter?: SubscriptionFilterHook
+  preventDuplicateOnAttributes?: string[]
+}
+
+export type UpdateFieldDeclarationType = {
+  extraArg?: ExtraArg
+  before?: MutationBeforeHook
+  after?: UpdateAfterHook
+  subscriptionFilter?: SubscriptionFilterHook
+}
+
+export type DeleteFieldDeclarationType = {
+  before?: DeleteBeforeHook
+  after?: DeleteAfterHook
+  subscriptionFilter?: SubscriptionFilterHook
+}
+
 export type ModelDeclarationType = {
   model: SequelizeModel
   actions?: ActionList
@@ -168,29 +189,20 @@ export type ModelDeclarationType = {
     after?: ListAfterHook
     resolver?: GraphQLFieldResolver<TSource, TArgs, TContext>
   }
-  create?: {
-    extraArg?: ExtraArg
-    before?: MutationBeforeHook
-    after?: CreateAfterHook
-    subscriptionFilter?: SubscriptionFilterHook
-    preventDuplicateOnAttributes?: string[]
-  }
-  update?: {
-    extraArg?: ExtraArg
-    before?: MutationBeforeHook
-    after?: UpdateAfterHook
-    subscriptionFilter?: SubscriptionFilterHook
-  }
-  delete?: {
-    before?: DeleteBeforeHook
-    after?: DeleteAfterHook
-    subscriptionFilter?: SubscriptionFilterHook
-  }
   count?: {
     extraArg?: ExtraArg
     before?: QueryBeforeHook
     resolver?: GraphQLFieldResolver<TSource, TArgs, TContext>
   }
+  create?:
+    | CreateFieldDeclarationType
+    | GraphQLFieldConfig<TSource, TContext, TArgs>
+  update?:
+    | UpdateFieldDeclarationType
+    | GraphQLFieldConfig<TSource, TContext, TArgs>
+  delete?:
+    | DeleteFieldDeclarationType
+    | GraphQLFieldConfig<TSource, TContext, TArgs>
 }
 
 export type SequelizeModels = { [key: string]: SequelizeModel } & {