diff --git a/src/database.ts b/src/database.ts
index c0513bbc5ec..abfaea85315 100644
--- a/src/database.ts
+++ b/src/database.ts
@@ -38,7 +38,7 @@ export class Database {
    *
    * @method faker.database.column
    */
-  column() {
+  column(): string {
     return this.faker.random.arrayElement(
       this.faker.definitions.database.column
     );
@@ -49,7 +49,7 @@ export class Database {
    *
    * @method faker.database.type
    */
-  type() {
+  type(): string {
     return this.faker.random.arrayElement(this.faker.definitions.database.type);
   }
 
@@ -58,7 +58,7 @@ export class Database {
    *
    * @method faker.database.collation
    */
-  collation() {
+  collation(): string {
     return this.faker.random.arrayElement(
       this.faker.definitions.database.collation
     );
@@ -69,7 +69,7 @@ export class Database {
    *
    * @method faker.database.engine
    */
-  engine() {
+  engine(): string {
     return this.faker.random.arrayElement(
       this.faker.definitions.database.engine
     );
diff --git a/src/finance.ts b/src/finance.ts
index 4ccc06bdd7b..34786faae90 100644
--- a/src/finance.ts
+++ b/src/finance.ts
@@ -153,7 +153,7 @@ export class Finance {
    *
    * @method faker.finance.currencyCode
    */
-  currencyCode() {
+  currencyCode(): string {
     // TODO @Shinigami92 2022-01-14: missing second parameter
     // @ts-expect-error
     return this.faker.random.objectElement(
@@ -166,7 +166,7 @@ export class Finance {
    *
    * @method faker.finance.currencyName
    */
-  currencyName() {
+  currencyName(): string {
     return this.faker.random.objectElement(
       this.faker.definitions.finance.currency,
       'key'
@@ -178,7 +178,7 @@ export class Finance {
    *
    * @method faker.finance.currencySymbol
    */
-  currencySymbol() {
+  currencySymbol(): string {
     let symbol;
 
     while (!symbol) {
diff --git a/src/hacker.ts b/src/hacker.ts
index ee36d814d43..dac9b4f6d9e 100644
--- a/src/hacker.ts
+++ b/src/hacker.ts
@@ -16,7 +16,7 @@ export class Hacker {
    *
    * @method faker.hacker.abbreviation
    */
-  abbreviation() {
+  abbreviation(): string {
     return this.faker.random.arrayElement(
       this.faker.definitions.hacker.abbreviation
     );
@@ -27,7 +27,7 @@ export class Hacker {
    *
    * @method faker.hacker.adjective
    */
-  adjective() {
+  adjective(): string {
     return this.faker.random.arrayElement(
       this.faker.definitions.hacker.adjective
     );
@@ -38,7 +38,7 @@ export class Hacker {
    *
    * @method faker.hacker.noun
    */
-  noun() {
+  noun(): string {
     return this.faker.random.arrayElement(this.faker.definitions.hacker.noun);
   }
 
@@ -47,7 +47,7 @@ export class Hacker {
    *
    * @method faker.hacker.verb
    */
-  verb() {
+  verb(): string {
     return this.faker.random.arrayElement(this.faker.definitions.hacker.verb);
   }
 
@@ -56,7 +56,7 @@ export class Hacker {
    *
    * @method faker.hacker.ingverb
    */
-  ingverb() {
+  ingverb(): string {
     return this.faker.random.arrayElement(
       this.faker.definitions.hacker.ingverb
     );
@@ -67,7 +67,7 @@ export class Hacker {
    *
    * @method faker.hacker.phrase
    */
-  phrase() {
+  phrase(): string {
     const data = {
       abbreviation: this.abbreviation,
       adjective: this.adjective,