diff --git a/backend/src/middleware/hashtags/extractHashtags.ts b/backend/src/middleware/hashtags/extractHashtags.ts
index 4c7667557..524c86336 100644
--- a/backend/src/middleware/hashtags/extractHashtags.ts
+++ b/backend/src/middleware/hashtags/extractHashtags.ts
@@ -18,7 +18,7 @@ export default function (content) {
       return $(el).attr('data-hashtag-id')
     })
     .get()
-  const hashtags = []
+  const hashtags: any = []
   ids.forEach((id) => {
     const match = exec(id, regX)
     if (match != null) {
diff --git a/backend/src/middleware/helpers/email/sendMail.ts b/backend/src/middleware/helpers/email/sendMail.ts
index 59d3b090b..60cc2078e 100644
--- a/backend/src/middleware/helpers/email/sendMail.ts
+++ b/backend/src/middleware/helpers/email/sendMail.ts
@@ -6,7 +6,7 @@ import { htmlToText } from 'nodemailer-html-to-text'
 const hasEmailConfig = CONFIG.SMTP_HOST && CONFIG.SMTP_PORT
 const hasAuthData = CONFIG.SMTP_USERNAME && CONFIG.SMTP_PASSWORD
 
-let sendMailCallback = async () => {}
+let sendMailCallback: any = async () => {}
 if (!hasEmailConfig) {
   if (!CONFIG.TEST) {
     // eslint-disable-next-line no-console
@@ -29,7 +29,7 @@ if (!hasEmailConfig) {
         cleanHtml(templateArgs.html, 'dummyKey', {
           allowedTags: ['a'],
           allowedAttributes: { a: ['href'] },
-        }).replace(/&/g, '&'),
+        } as any).replace(/&/g, '&'),
       )
     }
   }
diff --git a/backend/src/middleware/sentryMiddleware.ts b/backend/src/middleware/sentryMiddleware.ts
index 8891b8677..73f393eef 100644
--- a/backend/src/middleware/sentryMiddleware.ts
+++ b/backend/src/middleware/sentryMiddleware.ts
@@ -1,7 +1,7 @@
 import { sentry } from 'graphql-middleware-sentry'
 import CONFIG from '../config'
 
-let sentryMiddleware = (resolve, root, args, context, resolveInfo) =>
+let sentryMiddleware: any = (resolve, root, args, context, resolveInfo) =>
   resolve(root, args, context, resolveInfo)
 
 if (CONFIG.SENTRY_DSN_BACKEND) {
@@ -12,7 +12,7 @@ if (CONFIG.SENTRY_DSN_BACKEND) {
       release: CONFIG.COMMIT,
       environment: CONFIG.NODE_ENV,
     },
-    withScope: (scope, error, context) => {
+    withScope: (scope, error, context: any) => {
       scope.setUser({
         id: context.user && context.user.id,
       })