diff --git a/.github/workflows/publish.yml b/.github/workflows/publish.yml
index fdb2704..397a2d5 100644
--- a/.github/workflows/publish.yml
+++ b/.github/workflows/publish.yml
@@ -28,6 +28,7 @@ jobs:
         if: startsWith(github.ref, 'refs/tags/')
         uses: docker/build-push-action@v5
         with:
+          context: .
           platforms: linux/amd64,linux/arm64
           push: true
           tags: glenndehaan/unifi-voucher-site:${{ github.ref_name }}
@@ -35,6 +36,7 @@ jobs:
         if: github.ref == 'refs/heads/master'
         uses: docker/build-push-action@v5
         with:
+          context: .
           platforms: linux/amd64,linux/arm64
           push: true
           tags: glenndehaan/unifi-voucher-site:latest
diff --git a/README.md b/README.md
index 566549d..d9cadbe 100644
--- a/README.md
+++ b/README.md
@@ -57,6 +57,12 @@ services:
       AUTH_PASSWORD: '0000'
       # The Bearer token used for the API
       AUTH_TOKEN: '00000000-0000-0000-0000-000000000000'
+      # OIDC issuer base url provided by oauth provider. Example: https://auth.example.com/.well-known/openid-configuration
+      AUTH_OIDC_ISSUER_BASE_URL: ''
+      # OIDC UniFi Voucher base url (This application). Example: https://voucher.example.com
+      AUTH_OIDC_APP_BASE_URL: ''
+      # OIDC client id provided by oauth provider
+      AUTH_OIDC_CLIENT_ID: ''
       # Disables the login/authentication for the portal and API
       AUTH_DISABLE: 'false'
       # Voucher Types, format: expiration in minutes (required),single-use or multi-use vouchers value - '0' is for multi-use - '1' is for single-use (optional),upload speed limit in kbps (optional),download speed limit in kbps (optional),data transfer limit in MB (optional)
@@ -290,6 +296,31 @@ Once the SMTP environment variables are configured, the email feature will be av
 
 ![Example Email](https://github.com/user-attachments/assets/45615db3-df76-48b0-ad30-05236e3754c1)
 
+## OpenID Connect (OIDC) Authentication
+
+The UniFi Voucher Site allows seamless integration with OpenID Connect (OIDC), enabling users to authenticate through their preferred identity provider (IdP). The setup is straightforward, requiring configuration through environment variables to align with your existing OIDC provider.
+
+### Configuration
+
+To enable OIDC authentication, set the following environment variables in your application’s environment:
+
+- **`AUTH_OIDC_ISSUER_BASE_URL`**:
+  The base URL of your OIDC provider. This is typically the URL where the well-known OIDC configuration is hosted (e.g., `https://auth.example.com/.well-known/openid-configuration`).
+
+- **`AUTH_OIDC_APP_BASE_URL`**:
+  The base URL of your UniFi Voucher Site application. This should be the public URL where the site is accessible to users (e.g., `https://voucher.example.com`).
+
+- **`AUTH_OIDC_CLIENT_ID`**:
+  The client ID registered with your OIDC provider. This value is specific to the OIDC client created for the UniFi Voucher Site.
+
+> Please note that **enabling OIDC support will automatically disable the built-in login system**. Once OIDC is activated, all user authentication will be handled through your configured identity provider, and the local login mechanism will no longer be available.
+
+### OIDC Client Configuration
+
+When configuring your OIDC client, ensure that the following settings are enabled:
+
+- **Implicit Flow Support**: The OIDC client **must** support the Implicit flow. This is essential as the UniFi Voucher Site relies on this flow for authentication.
+
 ## Screenshots
 
 ### Login (Desktop)
diff --git a/middlewares/authorization.js b/middlewares/authorization.js
index f6474a1..489a49c 100644
--- a/middlewares/authorization.js
+++ b/middlewares/authorization.js
@@ -2,11 +2,15 @@
  * Import own modules
  */
 const jwt = require('../modules/jwt');
+const oidc = require('express-openid-connect');
 
 /**
  * Global variables
  */
 const authDisabled = (process.env.AUTH_DISABLE === 'true') || false;
+const oidcIssuerBaseUrl = process.env.AUTH_OIDC_ISSUER_BASE_URL || '';
+const oidcAppBaseUrl = process.env.AUTH_OIDC_APP_BASE_URL || '';
+const oidcClientId = process.env.AUTH_OIDC_CLIENT_ID || '';
 
 /**
  * Verifies if a user is signed in
@@ -23,8 +27,8 @@ module.exports = {
      * @return {Promise<void>}
      */
     web: async (req, res, next) => {
-        // Check if authentication is enabled
-        if(!authDisabled) {
+        // Check if authentication is enabled & OIDC is disabled
+        if(!authDisabled && (oidcIssuerBaseUrl === '' && oidcAppBaseUrl === '' && oidcClientId === '')) {
             // Check if user has an existing authorization cookie
             if (!req.cookies.authorization) {
                 res.redirect(302, `${req.headers['x-ingress-path'] ? req.headers['x-ingress-path'] : ''}/login`);
@@ -44,6 +48,12 @@ module.exports = {
             }
         }
 
+        // Check if authentication is enabled & OIDC is enabled
+        if(!authDisabled && (oidcIssuerBaseUrl !== '' && oidcAppBaseUrl !== '' && oidcClientId !== '')) {
+            const middleware = oidc.requiresAuth();
+            return middleware(req, res, next);
+        }
+
         next();
     },
 
diff --git a/modules/jwt.js b/modules/jwt.js
index 70c3af0..91c60df 100644
--- a/modules/jwt.js
+++ b/modules/jwt.js
@@ -21,7 +21,7 @@ const settings = {
 };
 
 /**
- * Exports the UniFi voucher functions
+ * Exports the JWT functions
  */
 module.exports = {
     /**
diff --git a/modules/oidc.js b/modules/oidc.js
new file mode 100644
index 0000000..921bb22
--- /dev/null
+++ b/modules/oidc.js
@@ -0,0 +1,41 @@
+/**
+ * Import base packages
+ */
+const crypto = require('crypto');
+const oidc = require('express-openid-connect');
+
+/**
+ * Import own modules
+ */
+const log = require('./log');
+
+/**
+ * OIDC Settings
+ *
+ * @type {{baseURL: string, idpLogout: boolean, authRequired: boolean, clientID: string, issuerBaseURL: string, secret: string}}
+ */
+const settings = {
+    issuerBaseURL: process.env.AUTH_OIDC_ISSUER_BASE_URL,
+    baseURL: process.env.AUTH_OIDC_APP_BASE_URL,
+    clientID: process.env.AUTH_OIDC_CLIENT_ID,
+    secret: '',
+    idpLogout: true,
+    authRequired: false
+};
+
+/**
+ * Exports the OIDC functions
+ */
+module.exports = {
+    /**
+     * Set the OIDC secret & setup OIDC middleware
+     *
+     * @param app
+     */
+    init: (app) => {
+        settings.secret = crypto.randomBytes(20).toString('hex');
+        log.info(`[OIDC] Set secret: ${settings.secret}`);
+        app.use(oidc.auth(settings));
+        log.info(`[OIDC] Issuer: ${settings.issuerBaseURL}, Client: ${settings.clientID}`);
+    }
+};
diff --git a/package-lock.json b/package-lock.json
index 7319b7c..4f0d826 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -12,6 +12,7 @@
         "cookie-parser": "^1.4.6",
         "ejs": "^3.1.10",
         "express": "^4.19.2",
+        "express-openid-connect": "^2.17.1",
         "js-logger": "^1.6.1",
         "jsonwebtoken": "^9.0.2",
         "multer": "^1.4.5-lts.1",
@@ -40,6 +41,21 @@
         "url": "https://github.com/sponsors/sindresorhus"
       }
     },
+    "node_modules/@hapi/hoek": {
+      "version": "9.3.0",
+      "resolved": "https://registry.npmjs.org/@hapi/hoek/-/hoek-9.3.0.tgz",
+      "integrity": "sha512-/c6rf4UJlmHlC9b5BaNvzAcFv7HZ2QHaV0D4/HNlBdvFnvQq8RI4kYdhyPCl7Xj+oWvTWQ8ujhqS53LIgAe6KQ==",
+      "license": "BSD-3-Clause"
+    },
+    "node_modules/@hapi/topo": {
+      "version": "5.1.0",
+      "resolved": "https://registry.npmjs.org/@hapi/topo/-/topo-5.1.0.tgz",
+      "integrity": "sha512-foQZKJig7Ob0BMAYBfcJk8d77QtOe7Wo4ox7ff1lQYoNNAb6jwcY1ncdoy2e9wQZzvNy7ODZCYJkK8kzmcAnAg==",
+      "license": "BSD-3-Clause",
+      "dependencies": {
+        "@hapi/hoek": "^9.0.0"
+      }
+    },
     "node_modules/@isaacs/cliui": {
       "version": "8.0.2",
       "resolved": "https://registry.npmjs.org/@isaacs/cliui/-/cliui-8.0.2.tgz",
@@ -227,6 +243,15 @@
         "node": ">= 8"
       }
     },
+    "node_modules/@panva/asn1.js": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/@panva/asn1.js/-/asn1.js-1.0.0.tgz",
+      "integrity": "sha512-UdkG3mLEqXgnlKsWanWcgb6dOjUzJ+XC5f+aWw30qrtjxeNUSfKX1cd5FBzOaXQumoe9nIqeZUvrRJS03HCCtw==",
+      "license": "MIT",
+      "engines": {
+        "node": ">=10.13.0"
+      }
+    },
     "node_modules/@pkgjs/parseargs": {
       "version": "0.11.0",
       "resolved": "https://registry.npmjs.org/@pkgjs/parseargs/-/parseargs-0.11.0.tgz",
@@ -237,6 +262,39 @@
         "node": ">=14"
       }
     },
+    "node_modules/@sideway/address": {
+      "version": "4.1.5",
+      "resolved": "https://registry.npmjs.org/@sideway/address/-/address-4.1.5.tgz",
+      "integrity": "sha512-IqO/DUQHUkPeixNQ8n0JA6102hT9CmaljNTPmQ1u8MEhBo/R4Q8eKLN/vGZxuebwOroDB4cbpjheD4+/sKFK4Q==",
+      "license": "BSD-3-Clause",
+      "dependencies": {
+        "@hapi/hoek": "^9.0.0"
+      }
+    },
+    "node_modules/@sideway/formula": {
+      "version": "3.0.1",
+      "resolved": "https://registry.npmjs.org/@sideway/formula/-/formula-3.0.1.tgz",
+      "integrity": "sha512-/poHZJJVjx3L+zVD6g9KgHfYnb443oi7wLu/XKojDviHy6HOEOA6z1Trk5aR1dGcmPenJEgb2sK2I80LeS3MIg==",
+      "license": "BSD-3-Clause"
+    },
+    "node_modules/@sideway/pinpoint": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/@sideway/pinpoint/-/pinpoint-2.0.0.tgz",
+      "integrity": "sha512-RNiOoTPkptFtSVzQevY/yWtZwf/RxyVnPy/OcA9HBM3MlGDnBEYL5B41H0MTn0Uec8Hi+2qUtTfG2WWZBmMejQ==",
+      "license": "BSD-3-Clause"
+    },
+    "node_modules/@sindresorhus/is": {
+      "version": "4.6.0",
+      "resolved": "https://registry.npmjs.org/@sindresorhus/is/-/is-4.6.0.tgz",
+      "integrity": "sha512-t09vSN3MdfsyCHoFcTRCH/iUtG7OJ0CsjzB8cjAmKc/va/kIgeDI/TxsigdncE/4be734m0cvIYwNaV4i2XqAw==",
+      "license": "MIT",
+      "engines": {
+        "node": ">=10"
+      },
+      "funding": {
+        "url": "https://github.com/sindresorhus/is?sponsor=1"
+      }
+    },
     "node_modules/@swc/helpers": {
       "version": "0.3.17",
       "resolved": "https://registry.npmjs.org/@swc/helpers/-/helpers-0.3.17.tgz",
@@ -245,6 +303,18 @@
         "tslib": "^2.4.0"
       }
     },
+    "node_modules/@szmarczak/http-timer": {
+      "version": "4.0.6",
+      "resolved": "https://registry.npmjs.org/@szmarczak/http-timer/-/http-timer-4.0.6.tgz",
+      "integrity": "sha512-4BAffykYOgO+5nzBWYwE3W90sBgLJoUPRWWcL8wlyiM8IB8ipJz3UMJ9KXQd1RKQXpKp8Tutn80HZtWsu2u76w==",
+      "license": "MIT",
+      "dependencies": {
+        "defer-to-connect": "^2.0.0"
+      },
+      "engines": {
+        "node": ">=10"
+      }
+    },
     "node_modules/@tailwindcss/forms": {
       "version": "0.5.7",
       "resolved": "https://registry.npmjs.org/@tailwindcss/forms/-/forms-0.5.7.tgz",
@@ -257,6 +327,51 @@
         "tailwindcss": ">=3.0.0 || >= 3.0.0-alpha.1"
       }
     },
+    "node_modules/@types/cacheable-request": {
+      "version": "6.0.3",
+      "resolved": "https://registry.npmjs.org/@types/cacheable-request/-/cacheable-request-6.0.3.tgz",
+      "integrity": "sha512-IQ3EbTzGxIigb1I3qPZc1rWJnH0BmSKv5QYTalEwweFvyBDLSAe24zP0le/hyi7ecGfZVlIVAg4BZqb8WBwKqw==",
+      "license": "MIT",
+      "dependencies": {
+        "@types/http-cache-semantics": "*",
+        "@types/keyv": "^3.1.4",
+        "@types/node": "*",
+        "@types/responselike": "^1.0.0"
+      }
+    },
+    "node_modules/@types/http-cache-semantics": {
+      "version": "4.0.4",
+      "resolved": "https://registry.npmjs.org/@types/http-cache-semantics/-/http-cache-semantics-4.0.4.tgz",
+      "integrity": "sha512-1m0bIFVc7eJWyve9S0RnuRgcQqF/Xd5QsUZAZeQFr1Q3/p9JWoQQEqmVy+DPTNpGXwhgIetAoYF8JSc33q29QA==",
+      "license": "MIT"
+    },
+    "node_modules/@types/keyv": {
+      "version": "3.1.4",
+      "resolved": "https://registry.npmjs.org/@types/keyv/-/keyv-3.1.4.tgz",
+      "integrity": "sha512-BQ5aZNSCpj7D6K2ksrRCTmKRLEpnPvWDiLPfoGyhZ++8YtiK9d/3DBKPJgry359X/P1PfruyYwvnvwFjuEiEIg==",
+      "license": "MIT",
+      "dependencies": {
+        "@types/node": "*"
+      }
+    },
+    "node_modules/@types/node": {
+      "version": "22.5.0",
+      "resolved": "https://registry.npmjs.org/@types/node/-/node-22.5.0.tgz",
+      "integrity": "sha512-DkFrJOe+rfdHTqqMg0bSNlGlQ85hSoh2TPzZyhHsXnMtligRWpxUySiyw8FY14ITt24HVCiQPWxS3KO/QlGmWg==",
+      "license": "MIT",
+      "dependencies": {
+        "undici-types": "~6.19.2"
+      }
+    },
+    "node_modules/@types/responselike": {
+      "version": "1.0.3",
+      "resolved": "https://registry.npmjs.org/@types/responselike/-/responselike-1.0.3.tgz",
+      "integrity": "sha512-H/+L+UkTV33uf49PH5pCAUBVPNj2nDBXTN+qS1dOwyyg24l3CcicicCA7ca+HMvJBZcFgl5r8e+RR6elsb4Lyw==",
+      "license": "MIT",
+      "dependencies": {
+        "@types/node": "*"
+      }
+    },
     "node_modules/accepts": {
       "version": "1.3.8",
       "resolved": "https://registry.npmjs.org/accepts/-/accepts-1.3.8.tgz",
@@ -301,6 +416,19 @@
       "resolved": "https://registry.npmjs.org/ms/-/ms-2.1.2.tgz",
       "integrity": "sha512-sGkPx+VjMtmA6MX27oA4FBFELFCZZ4S4XqeGOXCv68tT+jb3vk/RyaKWP0PTKyWtmLSM0b+adUTEvbs1PEaH2w=="
     },
+    "node_modules/aggregate-error": {
+      "version": "3.1.0",
+      "resolved": "https://registry.npmjs.org/aggregate-error/-/aggregate-error-3.1.0.tgz",
+      "integrity": "sha512-4I7Td01quW/RpocfNayFdFVk1qSuoh0E7JrbRJ16nH01HhKFQ88INq9Sd+nd72zqRySlr9BmDA8xlEJ6vJMrYA==",
+      "license": "MIT",
+      "dependencies": {
+        "clean-stack": "^2.0.0",
+        "indent-string": "^4.0.0"
+      },
+      "engines": {
+        "node": ">=8"
+      }
+    },
     "node_modules/ansi-regex": {
       "version": "6.0.1",
       "resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-6.0.1.tgz",
@@ -436,6 +564,15 @@
         }
       ]
     },
+    "node_modules/base64url": {
+      "version": "3.0.1",
+      "resolved": "https://registry.npmjs.org/base64url/-/base64url-3.0.1.tgz",
+      "integrity": "sha512-ir1UPr3dkwexU7FdV8qBBbNDRUhMmIekYMFZfi+C/sLNnRESKPl23nB9b2pltqfOQNnGzsDdId90AEtG5tCx4A==",
+      "license": "MIT",
+      "engines": {
+        "node": ">=6.0.0"
+      }
+    },
     "node_modules/binary-extensions": {
       "version": "2.2.0",
       "resolved": "https://registry.npmjs.org/binary-extensions/-/binary-extensions-2.2.0.tgz",
@@ -526,6 +663,33 @@
         "node": ">= 0.8"
       }
     },
+    "node_modules/cacheable-lookup": {
+      "version": "5.0.4",
+      "resolved": "https://registry.npmjs.org/cacheable-lookup/-/cacheable-lookup-5.0.4.tgz",
+      "integrity": "sha512-2/kNscPhpcxrOigMZzbiWF7dz8ilhb/nIHU3EyZiXWXpeq/au8qJ8VhdftMkty3n7Gj6HIGalQG8oiBNB3AJgA==",
+      "license": "MIT",
+      "engines": {
+        "node": ">=10.6.0"
+      }
+    },
+    "node_modules/cacheable-request": {
+      "version": "7.0.4",
+      "resolved": "https://registry.npmjs.org/cacheable-request/-/cacheable-request-7.0.4.tgz",
+      "integrity": "sha512-v+p6ongsrp0yTGbJXjgxPow2+DL93DASP4kXCDKb8/bwRtt9OEF3whggkkDkGNzgcWy2XaF4a8nZglC7uElscg==",
+      "license": "MIT",
+      "dependencies": {
+        "clone-response": "^1.0.2",
+        "get-stream": "^5.1.0",
+        "http-cache-semantics": "^4.0.0",
+        "keyv": "^4.0.0",
+        "lowercase-keys": "^2.0.0",
+        "normalize-url": "^6.0.1",
+        "responselike": "^2.0.0"
+      },
+      "engines": {
+        "node": ">=8"
+      }
+    },
     "node_modules/call-bind": {
       "version": "1.0.7",
       "resolved": "https://registry.npmjs.org/call-bind/-/call-bind-1.0.7.tgz",
@@ -595,6 +759,15 @@
         "fsevents": "~2.3.2"
       }
     },
+    "node_modules/clean-stack": {
+      "version": "2.2.0",
+      "resolved": "https://registry.npmjs.org/clean-stack/-/clean-stack-2.2.0.tgz",
+      "integrity": "sha512-4diC9HaTE+KRAMWhDhrGOECgWZxoevMc5TlkObMqNSsVU62PYzXZ/SMTjzyGAFF1YusgxGcSWTEXBhp0CPwQ1A==",
+      "license": "MIT",
+      "engines": {
+        "node": ">=6"
+      }
+    },
     "node_modules/clone": {
       "version": "2.1.2",
       "resolved": "https://registry.npmjs.org/clone/-/clone-2.1.2.tgz",
@@ -603,6 +776,18 @@
         "node": ">=0.8"
       }
     },
+    "node_modules/clone-response": {
+      "version": "1.0.3",
+      "resolved": "https://registry.npmjs.org/clone-response/-/clone-response-1.0.3.tgz",
+      "integrity": "sha512-ROoL94jJH2dUVML2Y/5PEDNaSHgeOdSDicUyS7izcF63G6sTc/FTjLub4b8Il9S8S0beOfYt0TaA5qvFK+w0wA==",
+      "license": "MIT",
+      "dependencies": {
+        "mimic-response": "^1.0.0"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/sindresorhus"
+      }
+    },
     "node_modules/color-convert": {
       "version": "2.0.1",
       "resolved": "https://registry.npmjs.org/color-convert/-/color-convert-2.0.1.tgz",
@@ -754,6 +939,33 @@
         "ms": "2.0.0"
       }
     },
+    "node_modules/decompress-response": {
+      "version": "6.0.0",
+      "resolved": "https://registry.npmjs.org/decompress-response/-/decompress-response-6.0.0.tgz",
+      "integrity": "sha512-aW35yZM6Bb/4oJlZncMH2LCoZtJXTRxES17vE3hoRiowU2kWHaJKFkSBDnDR+cm9J+9QhXmREyIfv0pji9ejCQ==",
+      "license": "MIT",
+      "dependencies": {
+        "mimic-response": "^3.1.0"
+      },
+      "engines": {
+        "node": ">=10"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/sindresorhus"
+      }
+    },
+    "node_modules/decompress-response/node_modules/mimic-response": {
+      "version": "3.1.0",
+      "resolved": "https://registry.npmjs.org/mimic-response/-/mimic-response-3.1.0.tgz",
+      "integrity": "sha512-z0yWI+4FDrrweS8Zmt4Ej5HdJmky15+L2e6Wgn3+iK5fWzb6T3fhNFq2+MeTRb064c6Wr4N/wv0DzQTjNzHNGQ==",
+      "license": "MIT",
+      "engines": {
+        "node": ">=10"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/sindresorhus"
+      }
+    },
     "node_modules/deep-equal": {
       "version": "2.2.3",
       "resolved": "https://registry.npmjs.org/deep-equal/-/deep-equal-2.2.3.tgz",
@@ -790,6 +1002,15 @@
       "resolved": "https://registry.npmjs.org/isarray/-/isarray-2.0.5.tgz",
       "integrity": "sha512-xHjhDr3cNBK0BzdUJSPXZntQUx/mwMS5Rw4A7lPJ90XGAO6ISP/ePDNuo0vhqOZU+UD5JoodwCAAoZQd3FeAKw=="
     },
+    "node_modules/defer-to-connect": {
+      "version": "2.0.1",
+      "resolved": "https://registry.npmjs.org/defer-to-connect/-/defer-to-connect-2.0.1.tgz",
+      "integrity": "sha512-4tvttepXG1VaYGrRibk5EwJd1t4udunSOVMdLSAL6mId1ix438oPwPZMALY41FCijukO1L0twNcGsdzS7dHgDg==",
+      "license": "MIT",
+      "engines": {
+        "node": ">=10"
+      }
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       "resolved": "https://registry.npmjs.org/pako/-/pako-0.2.9.tgz",
@@ -2569,6 +3112,16 @@
       "integrity": "sha512-77DZwxQmxKnu3aR542U+X8FypNzbfJ+C5XQDk3uWjWxn6151aIMGthWYRXTqT1E5oJvg+ljaa2OJi+VfvCOQ8w==",
       "dev": true
     },
+    "node_modules/pump": {
+      "version": "3.0.0",
+      "resolved": "https://registry.npmjs.org/pump/-/pump-3.0.0.tgz",
+      "integrity": "sha512-LwZy+p3SFs1Pytd/jYct4wpv49HiYCqd9Rlc5ZVdk0V+8Yzv6jR5Blk3TRmPL1ft69TxP0IMZGJ+WPFU2BFhww==",
+      "license": "MIT",
+      "dependencies": {
+        "end-of-stream": "^1.1.0",
+        "once": "^1.3.1"
+      }
+    },
     "node_modules/punycode": {
       "version": "2.3.1",
       "resolved": "https://registry.npmjs.org/punycode/-/punycode-2.3.1.tgz",
@@ -2616,6 +3169,18 @@
         }
       ]
     },
+    "node_modules/quick-lru": {
+      "version": "5.1.1",
+      "resolved": "https://registry.npmjs.org/quick-lru/-/quick-lru-5.1.1.tgz",
+      "integrity": "sha512-WuyALRjWPDGtt/wzJiadO5AXY+8hZ80hVpe6MyivgraREW751X3SbhRvG3eLKOYN+8VEvqLcf3wdnt44Z4S4SA==",
+      "license": "MIT",
+      "engines": {
+        "node": ">=10"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/sindresorhus"
+      }
+    },
     "node_modules/range-parser": {
       "version": "1.2.1",
       "resolved": "https://registry.npmjs.org/range-parser/-/range-parser-1.2.1.tgz",
@@ -2717,6 +3282,24 @@
         "url": "https://github.com/sponsors/ljharb"
       }
     },
+    "node_modules/resolve-alpn": {
+      "version": "1.2.1",
+      "resolved": "https://registry.npmjs.org/resolve-alpn/-/resolve-alpn-1.2.1.tgz",
+      "integrity": "sha512-0a1F4l73/ZFZOakJnQ3FvkJ2+gSTQWz/r2KE5OdDY0TxPm5h4GkqkWWfM47T7HsbnOtcJVEF4epCVy6u7Q3K+g==",
+      "license": "MIT"
+    },
+    "node_modules/responselike": {
+      "version": "2.0.1",
+      "resolved": "https://registry.npmjs.org/responselike/-/responselike-2.0.1.tgz",
+      "integrity": "sha512-4gl03wn3hj1HP3yzgdI7d3lCkF95F21Pz4BPGvKHinyQzALR5CapwC8yIi0Rh58DEMQ/SguC03wFj2k0M/mHhw==",
+      "license": "MIT",
+      "dependencies": {
+        "lowercase-keys": "^2.0.0"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/sindresorhus"
+      }
+    },
     "node_modules/restructure": {
       "version": "2.0.1",
       "resolved": "https://registry.npmjs.org/restructure/-/restructure-2.0.1.tgz",
@@ -3206,6 +3789,12 @@
       "integrity": "sha512-WxONCrssBM8TSPRqN5EmsjVrsv4A8X12J4ArBiiayv3DyyG3ZlIg6yysuuSYdZsVz3TKcTg2fd//Ujd4CHV1iA==",
       "dev": true
     },
+    "node_modules/undici-types": {
+      "version": "6.19.8",
+      "resolved": "https://registry.npmjs.org/undici-types/-/undici-types-6.19.8.tgz",
+      "integrity": "sha512-ve2KP6f/JnbPBFyobGHuerC9g1FYGn/F8n1LWTwNxCEzd6IfqTwUQcNXgEtmmQ6DlRrC1hrSrBnCZPokRrDHjw==",
+      "license": "MIT"
+    },
     "node_modules/unicode-properties": {
       "version": "1.4.1",
       "resolved": "https://registry.npmjs.org/unicode-properties/-/unicode-properties-1.4.1.tgz",
@@ -3249,6 +3838,12 @@
         "qs": "^6.11.2"
       }
     },
+    "node_modules/url-join": {
+      "version": "4.0.1",
+      "resolved": "https://registry.npmjs.org/url-join/-/url-join-4.0.1.tgz",
+      "integrity": "sha512-jk1+QP6ZJqyOiuEI9AEWQfju/nB2Pw466kbA0LEZljHwKeMgd9WrAEgEGxjPDD2+TNbbb37rTyhEfrCXfuKXnA==",
+      "license": "MIT"
+    },
     "node_modules/url-parse": {
       "version": "1.5.10",
       "resolved": "https://registry.npmjs.org/url-parse/-/url-parse-1.5.10.tgz",
@@ -3392,6 +3987,12 @@
         "url": "https://github.com/chalk/ansi-styles?sponsor=1"
       }
     },
+    "node_modules/wrappy": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/wrappy/-/wrappy-1.0.2.tgz",
+      "integrity": "sha512-l4Sp/DRseor9wL6EvV2+TuQn63dMkPjZ/sp9XkghTEbV9KlPS1xUsZ3u7/IQO4wxtcFB4bgpQPRcR3QCvezPcQ==",
+      "license": "ISC"
+    },
     "node_modules/ws": {
       "version": "8.17.1",
       "resolved": "https://registry.npmjs.org/ws/-/ws-8.17.1.tgz",
diff --git a/package.json b/package.json
index f80f9b5..4928320 100644
--- a/package.json
+++ b/package.json
@@ -23,6 +23,7 @@
     "cookie-parser": "^1.4.6",
     "ejs": "^3.1.10",
     "express": "^4.19.2",
+    "express-openid-connect": "^2.17.1",
     "js-logger": "^1.6.1",
     "jsonwebtoken": "^9.0.2",
     "multer": "^1.4.5-lts.1",
diff --git a/server.js b/server.js
index 76595ad..4600960 100644
--- a/server.js
+++ b/server.js
@@ -21,6 +21,7 @@ const time = require('./utils/time');
 const bytes = require('./utils/bytes');
 const unifi = require('./modules/unifi');
 const mail = require('./modules/mail');
+const oidc = require('./modules/oidc');
 
 /**
  * Import own middlewares
@@ -49,6 +50,9 @@ const authDisabled = (process.env.AUTH_DISABLE === 'true') || false;
 const smtpFrom = config('smtp_from') || process.env.SMTP_FROM || '';
 const smtpHost = config('smtp_host') || process.env.SMTP_HOST || '';
 const smtpPort = config('smtp_port') || process.env.SMTP_PORT || 25;
+const oidcIssuerBaseUrl = process.env.AUTH_OIDC_ISSUER_BASE_URL || '';
+const oidcAppBaseUrl = process.env.AUTH_OIDC_APP_BASE_URL || '';
+const oidcClientId = process.env.AUTH_OIDC_CLIENT_ID || '';
 
 /**
  * Output logo
@@ -105,7 +109,7 @@ if(smtpFrom !== '' && smtpHost !== '' && smtpPort !== '') {
 /**
  * Initialize JWT
  */
-if(!authDisabled) {
+if(!authDisabled && (oidcIssuerBaseUrl === '' && oidcAppBaseUrl === '' && oidcClientId === '')) {
     jwt.init();
 }
 
@@ -138,6 +142,13 @@ app.get('/_health', (req, res) => {
     });
 });
 
+/**
+ * Initialize OIDC
+ */
+if(!authDisabled && (oidcIssuerBaseUrl !== '' && oidcAppBaseUrl !== '' && oidcClientId !== '')) {
+    oidc.init(app);
+}
+
 /**
  * Enable multer
  */
@@ -179,38 +190,40 @@ app.get('/', (req, res) => {
 
 // Check if web service is enabled
 if(webService) {
-    app.get('/login', (req, res) => {
-        // Check if authentication is disabled
-        if (authDisabled) {
-            res.redirect(302, `${req.headers['x-ingress-path'] ? req.headers['x-ingress-path'] : ''}/vouchers`);
-            return;
-        }
+    if(oidcIssuerBaseUrl === '' && oidcAppBaseUrl === '' && oidcClientId === '') {
+        app.get('/login', (req, res) => {
+            // Check if authentication is disabled
+            if (authDisabled) {
+                res.redirect(302, `${req.headers['x-ingress-path'] ? req.headers['x-ingress-path'] : ''}/vouchers`);
+                return;
+            }
 
-        const hour = new Date().getHours();
-        const timeHeader = hour < 12 ? 'Good Morning' : hour < 18 ? 'Good Afternoon' : 'Good Evening';
+            const hour = new Date().getHours();
+            const timeHeader = hour < 12 ? 'Good Morning' : hour < 18 ? 'Good Afternoon' : 'Good Evening';
 
-        res.render('login', {
-            baseUrl: req.headers['x-ingress-path'] ? req.headers['x-ingress-path'] : '',
-            error: req.flashMessage.type === 'error',
-            error_text: req.flashMessage.message || '',
-            app_header: timeHeader
+            res.render('login', {
+                baseUrl: req.headers['x-ingress-path'] ? req.headers['x-ingress-path'] : '',
+                error: req.flashMessage.type === 'error',
+                error_text: req.flashMessage.message || '',
+                app_header: timeHeader
+            });
         });
-    });
-    app.post('/login', async (req, res) => {
-        if (typeof req.body === "undefined") {
-            res.status(400).send();
-            return;
-        }
+        app.post('/login', async (req, res) => {
+            if (typeof req.body === "undefined") {
+                res.status(400).send();
+                return;
+            }
 
-        const passwordCheck = req.body.password === (process.env.AUTH_PASSWORD || "0000");
+            const passwordCheck = req.body.password === (process.env.AUTH_PASSWORD || "0000");
 
-        if(!passwordCheck) {
-            res.cookie('flashMessage', JSON.stringify({type: 'error', message: 'Password Invalid!'}), {httpOnly: true, expires: new Date(Date.now() + 24 * 60 * 60 * 1000)}).redirect(302, `${req.headers['x-ingress-path'] ? req.headers['x-ingress-path'] : ''}/login`);
-            return;
-        }
+            if (!passwordCheck) {
+                res.cookie('flashMessage', JSON.stringify({type: 'error', message: 'Password Invalid!'}), {httpOnly: true, expires: new Date(Date.now() + 24 * 60 * 60 * 1000)}).redirect(302, `${req.headers['x-ingress-path'] ? req.headers['x-ingress-path'] : ''}/login`);
+                return;
+            }
 
-        res.cookie('authorization', jwt.sign(), {httpOnly: true, expires: new Date(Date.now() + 24 * 60 * 60 * 1000)}).redirect(302, `${req.headers['x-ingress-path'] ? req.headers['x-ingress-path'] : ''}/vouchers`);
-    });
+            res.cookie('authorization', jwt.sign(), {httpOnly: true, expires: new Date(Date.now() + 24 * 60 * 60 * 1000)}).redirect(302, `${req.headers['x-ingress-path'] ? req.headers['x-ingress-path'] : ''}/vouchers`);
+        });
+    }
     app.post('/voucher', [authorization.web], async (req, res) => {
         if (typeof req.body === "undefined") {
             res.status(400).send();