diff --git a/.eslintrc.json b/.eslintrc.json
index cdda2a982..a66ee6f02 100644
--- a/.eslintrc.json
+++ b/.eslintrc.json
@@ -142,7 +142,6 @@
 
         // The following rules are part of @typescript-eslint/stylistic-type-checked
         // and can be remove once solved
-        "@typescript-eslint/consistent-type-definitions": "warn",
         "@typescript-eslint/prefer-function-type": "warn",
         "@typescript-eslint/prefer-nullish-coalescing": "warn", // TODO: Requires strictNullChecks: true
         "@typescript-eslint/consistent-type-assertions": "warn",
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 9e80f3b05..8bc021cf1 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -9,6 +9,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Changed
 
+- Switched the `consistent-type-definitions` rule from `warn` to `error` in the `eslint` configuration
 - Switched the `no-empty-function` rule from `warn` to `error` in the `eslint` configuration
 
 ### Fixed
diff --git a/apps/api/src/app/auth/interfaces/simplewebauthn.ts b/apps/api/src/app/auth/interfaces/simplewebauthn.ts
index 4b9058e2f..ef0a14ffa 100644
--- a/apps/api/src/app/auth/interfaces/simplewebauthn.ts
+++ b/apps/api/src/app/auth/interfaces/simplewebauthn.ts
@@ -198,12 +198,12 @@ export interface AuthenticatorAssertionResponseJSON
 /**
  * A WebAuthn-compatible device and the information needed to verify assertions by it
  */
-export declare type AuthenticatorDevice = {
+export declare interface AuthenticatorDevice {
   credentialPublicKey: Buffer;
   credentialID: Buffer;
   counter: number;
   transports?: AuthenticatorTransport[];
-};
+}
 /**
  * An attempt to communicate that this isn't just any string, but a Base64URL-encoded string
  */
diff --git a/apps/api/src/app/user/update-user-setting.dto.ts b/apps/api/src/app/user/update-user-setting.dto.ts
index 6ea6d7427..a4441af92 100644
--- a/apps/api/src/app/user/update-user-setting.dto.ts
+++ b/apps/api/src/app/user/update-user-setting.dto.ts
@@ -1,10 +1,10 @@
 import { IsCurrencyCode } from '@ghostfolio/api/validators/is-currency-code';
+import { XRayRulesSettings } from '@ghostfolio/common/interfaces';
 import type {
   ColorScheme,
   DateRange,
   HoldingsViewMode,
-  ViewMode,
-  XRayRulesSettings
+  ViewMode
 } from '@ghostfolio/common/types';
 
 import {
diff --git a/apps/client/src/app/components/home-holdings/home-holdings.component.ts b/apps/client/src/app/components/home-holdings/home-holdings.component.ts
index c76638d33..d2b23d037 100644
--- a/apps/client/src/app/components/home-holdings/home-holdings.component.ts
+++ b/apps/client/src/app/components/home-holdings/home-holdings.component.ts
@@ -4,14 +4,11 @@ import { UserService } from '@ghostfolio/client/services/user/user.service';
 import {
   AssetProfileIdentifier,
   PortfolioPosition,
+  ToggleOption,
   User
 } from '@ghostfolio/common/interfaces';
 import { hasPermission, permissions } from '@ghostfolio/common/permissions';
-import {
-  HoldingType,
-  HoldingsViewMode,
-  ToggleOption
-} from '@ghostfolio/common/types';
+import { HoldingType, HoldingsViewMode } from '@ghostfolio/common/types';
 
 import { ChangeDetectorRef, Component, OnDestroy, OnInit } from '@angular/core';
 import { FormControl } from '@angular/forms';
diff --git a/apps/client/src/app/components/rule/rule-settings-dialog/interfaces/interfaces.ts b/apps/client/src/app/components/rule/rule-settings-dialog/interfaces/interfaces.ts
index 7eee7e52d..6fcbd2d38 100644
--- a/apps/client/src/app/components/rule/rule-settings-dialog/interfaces/interfaces.ts
+++ b/apps/client/src/app/components/rule/rule-settings-dialog/interfaces/interfaces.ts
@@ -1,5 +1,7 @@
-import { PortfolioReportRule } from '@ghostfolio/common/interfaces';
-import { XRayRulesSettings } from '@ghostfolio/common/types';
+import {
+  PortfolioReportRule,
+  XRayRulesSettings
+} from '@ghostfolio/common/interfaces';
 
 export interface IRuleSettingsDialogParams {
   rule: PortfolioReportRule;
diff --git a/apps/client/src/app/components/rule/rule-settings-dialog/rule-settings-dialog.component.ts b/apps/client/src/app/components/rule/rule-settings-dialog/rule-settings-dialog.component.ts
index 7aa228776..8b3dfed31 100644
--- a/apps/client/src/app/components/rule/rule-settings-dialog/rule-settings-dialog.component.ts
+++ b/apps/client/src/app/components/rule/rule-settings-dialog/rule-settings-dialog.component.ts
@@ -1,4 +1,4 @@
-import { XRayRulesSettings } from '@ghostfolio/common/types';
+import { XRayRulesSettings } from '@ghostfolio/common/interfaces';
 
 import { CommonModule } from '@angular/common';
 import { Component, Inject } from '@angular/core';
diff --git a/apps/client/src/app/components/rule/rule.component.ts b/apps/client/src/app/components/rule/rule.component.ts
index f51ce805f..04e6de666 100644
--- a/apps/client/src/app/components/rule/rule.component.ts
+++ b/apps/client/src/app/components/rule/rule.component.ts
@@ -1,7 +1,9 @@
 import { UpdateUserSettingDto } from '@ghostfolio/api/app/user/update-user-setting.dto';
 import { RuleSettings } from '@ghostfolio/api/models/interfaces/rule-settings.interface';
-import { PortfolioReportRule } from '@ghostfolio/common/interfaces';
-import { XRayRulesSettings } from '@ghostfolio/common/types';
+import {
+  PortfolioReportRule,
+  XRayRulesSettings
+} from '@ghostfolio/common/interfaces';
 
 import {
   ChangeDetectionStrategy,
diff --git a/apps/client/src/app/components/rules/rules.component.ts b/apps/client/src/app/components/rules/rules.component.ts
index fb2ef1cdb..bec0b642f 100644
--- a/apps/client/src/app/components/rules/rules.component.ts
+++ b/apps/client/src/app/components/rules/rules.component.ts
@@ -1,6 +1,8 @@
 import { UpdateUserSettingDto } from '@ghostfolio/api/app/user/update-user-setting.dto';
-import { PortfolioReportRule } from '@ghostfolio/common/interfaces';
-import { XRayRulesSettings } from '@ghostfolio/common/types';
+import {
+  PortfolioReportRule,
+  XRayRulesSettings
+} from '@ghostfolio/common/interfaces';
 
 import {
   ChangeDetectionStrategy,
diff --git a/apps/client/src/app/components/toggle/toggle.component.ts b/apps/client/src/app/components/toggle/toggle.component.ts
index ecc210294..4e056f1d3 100644
--- a/apps/client/src/app/components/toggle/toggle.component.ts
+++ b/apps/client/src/app/components/toggle/toggle.component.ts
@@ -1,4 +1,4 @@
-import { ToggleOption } from '@ghostfolio/common/types';
+import { ToggleOption } from '@ghostfolio/common/interfaces';
 
 import {
   ChangeDetectionStrategy,
diff --git a/apps/client/src/app/pages/portfolio/analysis/analysis-page.component.ts b/apps/client/src/app/pages/portfolio/analysis/analysis-page.component.ts
index 4cd75c7ad..6eb42b68d 100644
--- a/apps/client/src/app/pages/portfolio/analysis/analysis-page.component.ts
+++ b/apps/client/src/app/pages/portfolio/analysis/analysis-page.component.ts
@@ -4,13 +4,14 @@ import { ImpersonationStorageService } from '@ghostfolio/client/services/imperso
 import { UserService } from '@ghostfolio/client/services/user/user.service';
 import {
   HistoricalDataItem,
+  InvestmentItem,
   PortfolioInvestments,
   PortfolioPerformance,
   PortfolioPosition,
+  ToggleOption,
   User
 } from '@ghostfolio/common/interfaces';
-import { InvestmentItem } from '@ghostfolio/common/interfaces/investment-item.interface';
-import { GroupBy, ToggleOption } from '@ghostfolio/common/types';
+import { GroupBy } from '@ghostfolio/common/types';
 import { translate } from '@ghostfolio/ui/i18n';
 
 import { ChangeDetectorRef, Component, OnDestroy, OnInit } from '@angular/core';
diff --git a/libs/common/src/lib/interfaces/index.ts b/libs/common/src/lib/interfaces/index.ts
index 51bb7c10e..0ec04594c 100644
--- a/libs/common/src/lib/interfaces/index.ts
+++ b/libs/common/src/lib/interfaces/index.ts
@@ -50,8 +50,10 @@ import type { Subscription } from './subscription.interface';
 import type { SymbolMetrics } from './symbol-metrics.interface';
 import type { SystemMessage } from './system-message.interface';
 import type { TabConfiguration } from './tab-configuration.interface';
+import type { ToggleOption } from './toggle-option.interface';
 import type { UserSettings } from './user-settings.interface';
 import type { User } from './user.interface';
+import type { XRayRulesSettings } from './x-ray-rules-settings.interface';
 
 export {
   Access,
@@ -104,6 +106,8 @@ export {
   Subscription,
   SymbolMetrics,
   TabConfiguration,
+  ToggleOption,
   User,
-  UserSettings
+  UserSettings,
+  XRayRulesSettings
 };
diff --git a/libs/common/src/lib/types/toggle-option.type.ts b/libs/common/src/lib/interfaces/toggle-option.interface.ts
similarity index 50%
rename from libs/common/src/lib/types/toggle-option.type.ts
rename to libs/common/src/lib/interfaces/toggle-option.interface.ts
index 25ba4d7d2..ca7b16bb2 100644
--- a/libs/common/src/lib/types/toggle-option.type.ts
+++ b/libs/common/src/lib/interfaces/toggle-option.interface.ts
@@ -1,4 +1,4 @@
-export type ToggleOption = {
+export interface ToggleOption {
   label: string;
   value: string;
-};
+}
diff --git a/libs/common/src/lib/interfaces/user-settings.interface.ts b/libs/common/src/lib/interfaces/user-settings.interface.ts
index 106f54600..e9e90e71f 100644
--- a/libs/common/src/lib/interfaces/user-settings.interface.ts
+++ b/libs/common/src/lib/interfaces/user-settings.interface.ts
@@ -1,9 +1,9 @@
+import { XRayRulesSettings } from '@ghostfolio/common/interfaces/x-ray-rules-settings.interface';
 import {
   ColorScheme,
   DateRange,
   HoldingsViewMode,
-  ViewMode,
-  XRayRulesSettings
+  ViewMode
 } from '@ghostfolio/common/types';
 
 export interface UserSettings {
diff --git a/libs/common/src/lib/types/x-ray-rules-settings.type.ts b/libs/common/src/lib/interfaces/x-ray-rules-settings.interface.ts
similarity index 92%
rename from libs/common/src/lib/types/x-ray-rules-settings.type.ts
rename to libs/common/src/lib/interfaces/x-ray-rules-settings.interface.ts
index 8808162f5..f38a8e6a9 100644
--- a/libs/common/src/lib/types/x-ray-rules-settings.type.ts
+++ b/libs/common/src/lib/interfaces/x-ray-rules-settings.interface.ts
@@ -1,4 +1,4 @@
-export type XRayRulesSettings = {
+export interface XRayRulesSettings {
   AccountClusterRiskCurrentInvestment?: RuleSettings;
   AccountClusterRiskSingleAccount?: RuleSettings;
   AllocationClusterRiskDevelopedMarkets?: RuleSettings;
@@ -7,7 +7,7 @@ export type XRayRulesSettings = {
   CurrencyClusterRiskCurrentInvestment?: RuleSettings;
   EmergencyFundSetup?: RuleSettings;
   FeeRatioInitialInvestment?: RuleSettings;
-};
+}
 
 interface RuleSettings {
   isActive: boolean;
diff --git a/libs/common/src/lib/types/index.ts b/libs/common/src/lib/types/index.ts
index f8307152d..a66755ab1 100644
--- a/libs/common/src/lib/types/index.ts
+++ b/libs/common/src/lib/types/index.ts
@@ -16,10 +16,8 @@ import type { Market } from './market.type';
 import type { OrderWithAccount } from './order-with-account.type';
 import type { RequestWithUser } from './request-with-user.type';
 import type { SubscriptionOffer } from './subscription-offer.type';
-import type { ToggleOption } from './toggle-option.type';
 import type { UserWithSettings } from './user-with-settings.type';
 import type { ViewMode } from './view-mode.type';
-import type { XRayRulesSettings } from './x-ray-rules-settings.type';
 
 export type {
   AccessType,
@@ -40,8 +38,6 @@ export type {
   OrderWithAccount,
   RequestWithUser,
   SubscriptionOffer,
-  ToggleOption,
   UserWithSettings,
-  ViewMode,
-  XRayRulesSettings
+  ViewMode
 };