diff --git a/backend/src/schema/resolvers/helpers/Resolver.ts b/backend/src/schema/resolvers/helpers/Resolver.ts
index 6e8211521..58d1512d7 100644
--- a/backend/src/schema/resolvers/helpers/Resolver.ts
+++ b/backend/src/schema/resolvers/helpers/Resolver.ts
@@ -10,7 +10,7 @@ export const undefinedToNullResolver = (list) => {
   return resolvers
 }
 
-export default function Resolver(type, options = {}) {
+export default function Resolver(type, options: any = {}) {
   const {
     idAttribute = 'id',
     undefinedToNull = [],
@@ -44,7 +44,7 @@ export default function Resolver(type, options = {}) {
     }
   }
 
-  const booleanResolver = (obj) => {
+  const booleanResolver = (obj: any[]) => {
     const resolvers = {}
     for (const [key, condition] of Object.entries(obj)) {
       resolvers[key] = async (parent, params, { cypherParams, driver }, resolveInfo) => {
diff --git a/backend/src/schema/resolvers/helpers/generateInviteCode.ts b/backend/src/schema/resolvers/helpers/generateInviteCode.ts
index 99c752eb0..5a123ff88 100644
--- a/backend/src/schema/resolvers/helpers/generateInviteCode.ts
+++ b/backend/src/schema/resolvers/helpers/generateInviteCode.ts
@@ -4,7 +4,7 @@ export default function generateInviteCode() {
   // 6 random numbers in [ 0, 35 ] are 36 possible numbers (10 [0-9] + 26 [A-Z])
   return Array.from(
     { length: CONSTANTS_REGISTRATION.INVITE_CODE_LENGTH },
-    (n = Math.floor(Math.random() * 36)) => {
+    (n: number = Math.floor(Math.random() * 36)) => {
       // n > 9: it is a letter (ASCII 65 is A) -> 10 + 55 = 65
       // else: it is a number (ASCII 48 is 0) -> 0 + 48 = 48
       return String.fromCharCode(n > 9 ? n + 55 : n + 48)
diff --git a/backend/src/schema/resolvers/helpers/generateNonce.ts b/backend/src/schema/resolvers/helpers/generateNonce.ts
index 50aa8489e..f08b3ccd6 100644
--- a/backend/src/schema/resolvers/helpers/generateNonce.ts
+++ b/backend/src/schema/resolvers/helpers/generateNonce.ts
@@ -4,7 +4,7 @@ import CONSTANTS_REGISTRATION from './../../../constants/registration'
 export default function generateNonce() {
   return Array.from(
     { length: CONSTANTS_REGISTRATION.NONCE_LENGTH },
-    (n = Math.floor(Math.random() * 10)) => {
+    (n: number = Math.floor(Math.random() * 10)) => {
       return String.fromCharCode(n + 48)
     },
   ).join('')
diff --git a/backend/src/schema/resolvers/images/images.ts b/backend/src/schema/resolvers/images/images.ts
index 180c6d090..b99b13a10 100644
--- a/backend/src/schema/resolvers/images/images.ts
+++ b/backend/src/schema/resolvers/images/images.ts
@@ -10,7 +10,7 @@ import CONFIG from '../../../config'
 // const widths = [34, 160, 320, 640, 1024]
 const { AWS_ENDPOINT: endpoint, AWS_REGION: region, AWS_BUCKET: Bucket, S3_CONFIGURED } = CONFIG
 
-export async function deleteImage(resource, relationshipType, opts = {}) {
+export async function deleteImage(resource, relationshipType, opts: any = {}) {
   sanitizeRelationshipType(relationshipType)
   const { transaction, deleteCallback } = opts
   if (!transaction) return wrapTransaction(deleteImage, [resource, relationshipType], opts)
@@ -32,7 +32,7 @@ export async function deleteImage(resource, relationshipType, opts = {}) {
   return image
 }
 
-export async function mergeImage(resource, relationshipType, imageInput, opts = {}) {
+export async function mergeImage(resource, relationshipType, imageInput, opts: any = {}) {
   if (typeof imageInput === 'undefined') return
   if (imageInput === null) return deleteImage(resource, relationshipType, opts)
   sanitizeRelationshipType(relationshipType)
diff --git a/backend/src/schema/resolvers/searches.ts b/backend/src/schema/resolvers/searches.ts
index ccbbb3b8e..83eeb1b2d 100644
--- a/backend/src/schema/resolvers/searches.ts
+++ b/backend/src/schema/resolvers/searches.ts
@@ -244,7 +244,7 @@ export default {
         ]
 
       params.limit = 15
-      const type = multiSearchMap.find((obj) => obj.symbol === searchType)
+      const type: any = multiSearchMap.find((obj) => obj.symbol === searchType)
       return getSearchResults(context, type.setup, params)
     },
   },
diff --git a/backend/src/schema/resolvers/statistics.ts b/backend/src/schema/resolvers/statistics.ts
index d9b7c153e..b454ce8f4 100644
--- a/backend/src/schema/resolvers/statistics.ts
+++ b/backend/src/schema/resolvers/statistics.ts
@@ -4,7 +4,7 @@ export default {
   Query: {
     statistics: async (_parent, _args, { driver }) => {
       const session = driver.session()
-      const counts = {}
+      const counts: any = {}
       try {
         const mapping = {
           countUsers: 'User',
diff --git a/backend/src/schema/resolvers/users/location.ts b/backend/src/schema/resolvers/users/location.ts
index 54d73560b..0c3f55595 100644
--- a/backend/src/schema/resolvers/users/location.ts
+++ b/backend/src/schema/resolvers/users/location.ts
@@ -72,7 +72,7 @@ export const createOrUpdateLocations = async (nodeLabel, nodeId, locationName, s
   let locationId
 
   if (locationName !== null) {
-    const res = await fetch(
+    const res: any = await fetch(
       `https://api.mapbox.com/geocoding/v5/mapbox.places/${encodeURIComponent(
         locationName,
       )}.json?access_token=${
@@ -155,7 +155,7 @@ export const createOrUpdateLocations = async (nodeLabel, nodeId, locationName, s
 }
 
 export const queryLocations = async ({ place, lang }) => {
-  const res = await fetch(
+  const res: any = await fetch(
     `https://api.mapbox.com/geocoding/v5/mapbox.places/${place}.json?access_token=${CONFIG.MAPBOX_TOKEN}&types=region,place,country&language=${lang}`,
   )
   // Return empty array if no location found or error occurred