diff --git a/backend/src/graphql/resolver/TransactionLinkResolver.ts b/backend/src/graphql/resolver/TransactionLinkResolver.ts
index f2d58cb64..d6e8e09ae 100644
--- a/backend/src/graphql/resolver/TransactionLinkResolver.ts
+++ b/backend/src/graphql/resolver/TransactionLinkResolver.ts
@@ -128,7 +128,7 @@ export class TransactionLinkResolver {
   @Authorized([RIGHTS.QUERY_TRANSACTION_LINK])
   @Query(() => QueryLinkResult)
   async queryTransactionLink(@Arg('code') code: string): Promise<typeof QueryLinkResult> {
-    if (/^CL-/.exec(code)) {
+    if (code.match(/^CL-/)) {
       const contributionLink = await DbContributionLink.findOneOrFail(
         { code: code.replace('CL-', '') },
         { withDeleted: true },
@@ -154,7 +154,7 @@ export class TransactionLinkResolver {
     const clientTimezoneOffset = getClientTimezoneOffset(context)
     const user = getUser(context)
 
-    if (/^CL-/.exec(code)) {
+    if (code.match(/^CL-/)) {
       // acquire lock
       const releaseLock = await TRANSACTIONS_LOCK.acquire()
       try {
diff --git a/backend/src/graphql/resolver/UserResolver.ts b/backend/src/graphql/resolver/UserResolver.ts
index ad357116a..078a29a8e 100644
--- a/backend/src/graphql/resolver/UserResolver.ts
+++ b/backend/src/graphql/resolver/UserResolver.ts
@@ -280,7 +280,7 @@ export class UserResolver {
     dbUser.passwordEncryptionType = PasswordEncryptionType.NO_PASSWORD
     logger.debug('new dbUser', dbUser)
     if (redeemCode) {
-      if (/^CL-/.exec(redeemCode)) {
+      if (redeemCode.match(/^CL-/)) {
         const contributionLink = await DbContributionLink.findOne({
           code: redeemCode.replace('CL-', ''),
         })
diff --git a/backend/src/password/EncryptorUtils.ts b/backend/src/password/EncryptorUtils.ts
index 93e519fe4..4c802a86f 100644
--- a/backend/src/password/EncryptorUtils.ts
+++ b/backend/src/password/EncryptorUtils.ts
@@ -12,7 +12,7 @@ const sodium = require('sodium-native')
 
 // We will reuse this for changePassword
 export const isValidPassword = (password: string): boolean => {
-  return !!/^(?=.*[a-z])(?=.*[A-Z])(?=.*[0-9])(?=.*[^a-zA-Z0-9 \\t\\n\\r]).{8,}$/.exec(password)
+  return !!password.match(/^(?=.*[a-z])(?=.*[A-Z])(?=.*[0-9])(?=.*[^a-zA-Z0-9 \\t\\n\\r]).{8,}$/)
 }
 
 export const SecretKeyCryptographyCreateKey = (salt: string, password: string): Buffer[] => {
diff --git a/backend/src/webhook/elopage.ts b/backend/src/webhook/elopage.ts
index e3e1bbecb..587bb788c 100644
--- a/backend/src/webhook/elopage.ts
+++ b/backend/src/webhook/elopage.ts
@@ -119,7 +119,7 @@ export const elopageWebhook = async (req: any, res: any): Promise<void> => {
     // Validate inputs
     if (
       email === '' ||
-      !VALIDATE_EMAIL.exec(email) ||
+      !email.match(VALIDATE_EMAIL) ||
       firstName === '' ||
       firstName.match(VALIDATE_NAME) ||
       lastName === '' ||