diff --git a/package.json b/package.json
index ac92c29..7921080 100644
--- a/package.json
+++ b/package.json
@@ -26,11 +26,13 @@
     "@nestjs/mapped-types": "*",
     "@nestjs/microservices": "^11.1.14",
     "@nestjs/platform-express": "^11.0.1",
+    "@teacinema/contracts": "^1.1.0",
     "@teacinema/core": "^1.0.9",
     "amqp-connection-manager": "^5.0.0",
     "amqplib": "^0.10.9",
     "reflect-metadata": "^0.2.2",
-    "rxjs": "^7.8.1"
+    "rxjs": "^7.8.1",
+    "zod": "^4.3.6"
   },
   "devDependencies": {
     "@eslint/eslintrc": "^3.2.0",
diff --git a/src/app.module.ts b/src/app.module.ts
index 1e51397..1417b15 100644
--- a/src/app.module.ts
+++ b/src/app.module.ts
@@ -1,13 +1,16 @@
 import { Module } from '@nestjs/common'
 import { ConfigModule } from '@nestjs/config'
 
+import configuration from './config/configuration'
 import { RmqModule } from './infra/rmq/rmq.module'
 import { NotificationsModule } from './modules/notifications/notifications.module'
 
 @Module({
   imports: [
     ConfigModule.forRoot({
-      isGlobal: true
+      isGlobal: true,
+      load: [configuration],
+      expandVariables: true
     }),
     RmqModule,
     NotificationsModule
diff --git a/src/config/configuration.ts b/src/config/configuration.ts
new file mode 100644
index 0000000..5d7b9ff
--- /dev/null
+++ b/src/config/configuration.ts
@@ -0,0 +1,22 @@
+import validationSchema from './validation.schema'
+
+export default () => {
+  const parsed = validationSchema.safeParse(process.env)
+
+  if (!parsed.success) {
+    console.error('Invalid enviroment variables', parsed.error.format())
+    process.exit(1)
+  }
+
+  const env = parsed.data
+
+  return {
+    app: {
+      nodeEnv: env.NODE_ENV
+    },
+    rmq: {
+      url: env.RMQ_URL,
+      queue: env.RMQ_QUEUE
+    }
+  }
+}
diff --git a/src/config/validation.schema.ts b/src/config/validation.schema.ts
new file mode 100644
index 0000000..9c03c59
--- /dev/null
+++ b/src/config/validation.schema.ts
@@ -0,0 +1,13 @@
+import { z } from 'zod'
+
+export enum Enviroment {
+  Development = 'development',
+  Production = 'production',
+  Test = 'test'
+}
+
+export default z.object({
+  NODE_ENV: z.enum(Enviroment).default(Enviroment.Development),
+  RMQ_URL: z.string().nonempty(),
+  RMQ_QUEUE: z.string().nonempty()
+})
diff --git a/src/main.ts b/src/main.ts
index 805d98a..ef14e7a 100644
--- a/src/main.ts
+++ b/src/main.ts
@@ -12,8 +12,8 @@ async function bootstrap() {
   app.connectMicroservice<MicroserviceOptions>({
     transport: Transport.RMQ,
     options: {
-      urls: [config.getOrThrow<string>('RMQ_URL')],
-      queue: config.getOrThrow<string>('RMQ_QUEUE'),
+      urls: [config.get('rmq.url')],
+      queue: config.get('rmq.queue'),
       queueOptions: {
         durable: false
       },
diff --git a/src/modules/notifications/notifications.controller.ts b/src/modules/notifications/notifications.controller.ts
index a85d90b..3fc9980 100644
--- a/src/modules/notifications/notifications.controller.ts
+++ b/src/modules/notifications/notifications.controller.ts
@@ -1,5 +1,6 @@
 import { Controller } from '@nestjs/common'
 import { Ctx, EventPattern, Payload, RmqContext } from '@nestjs/microservices'
+import type { OtpRequestedEvent } from '@teacinema/contracts'
 
 import { RmqService } from '../../infra/rmq/rmq.service'
 
@@ -13,7 +14,10 @@ export class NotificationsController {
   ) {}
 
   @EventPattern('auth.otp.requested')
-  public otpRequested(@Payload() data: any, @Ctx() ctx: RmqContext) {
+  public otpRequested(
+    @Payload() data: OtpRequestedEvent,
+    @Ctx() ctx: RmqContext
+  ) {
     try {
       console.log('OTP received', data)
       this.rmqService.ack(ctx)
diff --git a/yarn.lock b/yarn.lock
index 0568f28..49c41f9 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -333,6 +333,11 @@
   resolved "https://registry.yarnpkg.com/@borewit/text-codec/-/text-codec-0.2.1.tgz#5d171538907a8cb395fdc2eb5e8f7947d96c7f2f"
   integrity sha512-k7vvKPbf7J2fZ5klGRD9AeKfUvojuZIQ3BT5u7Jfv+puwXkUBUT5PVyMDfJZpy30CBDXGMgw7fguK/lpOMBvgw==
 
+"@bufbuild/protobuf@^2.0.0", "@bufbuild/protobuf@^2.10.2":
+  version "2.11.0"
+  resolved "https://registry.yarnpkg.com/@bufbuild/protobuf/-/protobuf-2.11.0.tgz#3ec3985c9074b23aea337957225fe15a0e845f8e"
+  integrity sha512-sBXGT13cpmPR5BMgHE6UEEfEaShh5Ror6rfN3yEK5si7QVrtZg8LEPQb0VVhiLRUslD2yLnXtnRzG035J/mZXQ==
+
 "@colors/colors@1.5.0":
   version "1.5.0"
   resolved "https://registry.yarnpkg.com/@colors/colors/-/colors-1.5.0.tgz#bb504579c1cae923e6576a4f5da43d25f97bdbd9"
@@ -992,7 +997,7 @@
   resolved "https://registry.yarnpkg.com/@nestjs/mapped-types/-/mapped-types-2.1.0.tgz#b9b536b7c3571567aa1d0223db8baa1a51505a19"
   integrity sha512-W+n+rM69XsFdwORF11UqJahn4J3xi4g/ZEOlJNL6KoW5ygWSmBB2p0S2BZ4FQeS/NDH72e6xIcu35SfJnE8bXw==
 
-"@nestjs/microservices@^11.1.14":
+"@nestjs/microservices@^11.1.12", "@nestjs/microservices@^11.1.14":
   version "11.1.14"
   resolved "https://registry.yarnpkg.com/@nestjs/microservices/-/microservices-11.1.14.tgz#8fa2de758ec2c768da7d993d79f772b699a507ff"
   integrity sha512-7x+QaX7351xJMYpjw4pqwoACXtSxuUQt4Prb7ZyqqsCawnBRrObPpZ/HIdpdKJPgo8vFfLJoAnkFJ+mQ6xz6Rw==
@@ -1077,6 +1082,16 @@
   dependencies:
     "@sinonjs/commons" "^3.0.1"
 
+"@teacinema/contracts@^1.1.0":
+  version "1.1.0"
+  resolved "https://git.ksv741.keenetic.pro/api/packages/teacinema/npm/%40teacinema%2Fcontracts/-/1.1.0/contracts-1.1.0.tgz#0d2f03f283dc9ee048eeb770152127f2037b7133"
+  integrity sha512-x90R4R96AgrUDzOjUT7ePtc7phG3Gx61sI8/CZ1hETF3Ok/TWTHblxX/CIZVcOormBrxEh1FfU39P8/nfno91g==
+  dependencies:
+    "@nestjs/microservices" "^11.1.12"
+    protoc "33.4.0"
+    rxjs "^7.8.2"
+    ts-proto "2.11.0"
+
 "@teacinema/core@^1.0.9":
   version "1.0.9"
   resolved "https://git.ksv741.keenetic.pro/api/packages/teacinema/npm/%40teacinema%2Fcore/-/1.0.9/core-1.0.9.tgz#deec0675c6cc03fe2511a6b8dc5d6b6763998708"
@@ -2081,6 +2096,11 @@ caniuse-lite@^1.0.30001759:
   resolved "https://registry.yarnpkg.com/caniuse-lite/-/caniuse-lite-1.0.30001774.tgz#0e576b6f374063abcd499d202b9ba1301be29b70"
   integrity sha512-DDdwPGz99nmIEv216hKSgLD+D4ikHQHjBC/seF98N9CPqRX4M5mSxT9eTV6oyisnJcuzxtZy4n17yKKQYmYQOA==
 
+case-anything@^2.1.13:
+  version "2.1.13"
+  resolved "https://registry.yarnpkg.com/case-anything/-/case-anything-2.1.13.tgz#0cdc16278cb29a7fcdeb072400da3f342ba329e9"
+  integrity sha512-zlOQ80VrQ2Ue+ymH5OuM/DlDq64mEm+B9UTdHULv5osUMD6HalNTblf2b1u/m6QecjsnOkBpqVZ+XPwIVsy7Ng==
+
 chalk@^4.0.0, chalk@^4.1.0, chalk@^4.1.2:
   version "4.1.2"
   resolved "https://registry.yarnpkg.com/chalk/-/chalk-4.1.2.tgz#aac4e2b7734a740867aeb16bf02aad556a1e7a01"
@@ -2340,6 +2360,11 @@ depd@^2.0.0, depd@~2.0.0:
   resolved "https://registry.yarnpkg.com/depd/-/depd-2.0.0.tgz#b696163cc757560d09cf22cc8fad1571b79e76df"
   integrity sha512-g7nH6P6dyDioJogAAGprGpCtVImJhpPk/roCzdb3fIh61/s/nPsfR6onyMwkCAR/OlC3yBC0lESvUoQEAssIrw==
 
+detect-libc@^1.0.3:
+  version "1.0.3"
+  resolved "https://registry.yarnpkg.com/detect-libc/-/detect-libc-1.0.3.tgz#fa137c4bd698edf55cd5cd02ac559f91a4c4ba9b"
+  integrity sha512-pGjwhsmsp4kL2RTz08wcOlGN83otlqHeD/Z5T8GXZB+/YcpQ/dgo+lbU8ZsGxV0HIvqqxo9l7mqYwyYMD9bKDg==
+
 detect-newline@^3.1.0:
   version "3.1.0"
   resolved "https://registry.yarnpkg.com/detect-newline/-/detect-newline-3.1.0.tgz#576f5dfc63ae1a192ff192d8ad3af6308991b651"
@@ -2375,6 +2400,13 @@ dotenv@^16.4.5:
   resolved "https://registry.yarnpkg.com/dotenv/-/dotenv-16.6.1.tgz#773f0e69527a8315c7285d5ee73c4459d20a8020"
   integrity sha512-uBq4egWHTcTt33a72vpSG0z3HnPuIl6NqYcTrKEg2azoEyl2hpW0zqlxysq2pK9HlDIHyHyakeYaYnSAwd8bow==
 
+dprint-node@^1.0.8:
+  version "1.0.8"
+  resolved "https://registry.yarnpkg.com/dprint-node/-/dprint-node-1.0.8.tgz#a02470722d8208a7d7eb3704328afda1d6758625"
+  integrity sha512-iVKnUtYfGrYcW1ZAlfR/F59cUVL8QIhWoBJoSjkkdua/dkWIgjZfiLMeTjiB06X0ZLkQ0M2C1VbUj/CxkIf1zg==
+  dependencies:
+    detect-libc "^1.0.3"
+
 dunder-proto@^1.0.1:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/dunder-proto/-/dunder-proto-1.0.1.tgz#d7ae667e1dc83482f8b70fd0f6eefc50da30f58a"
@@ -4196,6 +4228,11 @@ promise-breaker@^6.0.0:
   resolved "https://registry.yarnpkg.com/promise-breaker/-/promise-breaker-6.0.0.tgz#107d2b70f161236abdb4ac5a736c7eb8df489d0f"
   integrity sha512-BthzO9yTPswGf7etOBiHCVuugs2N01/Q/94dIPls48z2zCmrnDptUUZzfIb+41xq0MnYZ/BzmOd6ikDR4ibNZA==
 
+protoc@33.4.0:
+  version "33.4.0"
+  resolved "https://registry.yarnpkg.com/protoc/-/protoc-33.4.0.tgz#4a288b59f5f50b9a2c4bbf345276357e59dd6f10"
+  integrity sha512-dC1SJKbn4f60onsAMrfiPMygfSz4w/tPGHtPCqMSa5CLfHocJXkHjsvXeuuhjSPAJ8uUc8rfUvs0Hy9nmKIOhA==
+
 proxy-addr@^2.0.7:
   version "2.0.7"
   resolved "https://registry.yarnpkg.com/proxy-addr/-/proxy-addr-2.0.7.tgz#f19fe69ceab311eeb94b42e70e8c2070f9ba1025"
@@ -4330,7 +4367,7 @@ rxjs@7.8.1:
   dependencies:
     tslib "^2.1.0"
 
-rxjs@^7.8.1:
+rxjs@^7.8.1, rxjs@^7.8.2:
   version "7.8.2"
   resolved "https://registry.yarnpkg.com/rxjs/-/rxjs-7.8.2.tgz#955bc473ed8af11a002a2be52071bf475638607b"
   integrity sha512-dhKf903U/PQZY6boNNtAGdWbG85WAbjT/1xYoZIC7FAY0yWapOBQVsVrDl58W86//e1VpMNBtRV4MaXfdMySFA==
@@ -4794,6 +4831,30 @@ ts-node@^10.9.2:
     v8-compile-cache-lib "^3.0.1"
     yn "3.1.1"
 
+ts-poet@^6.12.0:
+  version "6.12.0"
+  resolved "https://registry.yarnpkg.com/ts-poet/-/ts-poet-6.12.0.tgz#f28eb91778fdff8e1b264600c7ddddb40cd39d84"
+  integrity sha512-xo+iRNMWqyvXpFTaOAvLPA5QAWO6TZrSUs5s4Odaya3epqofBu/fMLHEWl8jPmjhA0s9sgj9sNvF1BmaQlmQkA==
+  dependencies:
+    dprint-node "^1.0.8"
+
+ts-proto-descriptors@2.1.0:
+  version "2.1.0"
+  resolved "https://registry.yarnpkg.com/ts-proto-descriptors/-/ts-proto-descriptors-2.1.0.tgz#0c60525ea94748f7b3f394dc10d6eb8eeac4fe39"
+  integrity sha512-S5EZYEQ6L9KLFfjSRpZWDIXDV/W7tAj8uW7pLsihIxyr62EAVSiKuVPwE8iWnr849Bqa53enex1jhDUcpgquzA==
+  dependencies:
+    "@bufbuild/protobuf" "^2.0.0"
+
+ts-proto@2.11.0:
+  version "2.11.0"
+  resolved "https://registry.yarnpkg.com/ts-proto/-/ts-proto-2.11.0.tgz#4b24b3a39893441d97e8a875e7d7c509a7bb4521"
+  integrity sha512-Emqt0T/Wf74aT+IAoOqEkWWhxVOVF6QwVW4CBIyL3RRQORJpaQDVHy/Ykg9psQH/Zo6XMpT9KBRjpkVSZ0vXkQ==
+  dependencies:
+    "@bufbuild/protobuf" "^2.10.2"
+    case-anything "^2.1.13"
+    ts-poet "^6.12.0"
+    ts-proto-descriptors "2.1.0"
+
 tsconfig-paths-webpack-plugin@4.2.0:
   version "4.2.0"
   resolved "https://registry.yarnpkg.com/tsconfig-paths-webpack-plugin/-/tsconfig-paths-webpack-plugin-4.2.0.tgz#f7459a8ed1dd4cf66ad787aefc3d37fff3cf07fc"
@@ -5164,3 +5225,8 @@ yoctocolors-cjs@^2.1.3:
   version "2.1.3"
   resolved "https://registry.yarnpkg.com/yoctocolors-cjs/-/yoctocolors-cjs-2.1.3.tgz#7e4964ea8ec422b7a40ac917d3a344cfd2304baa"
   integrity sha512-U/PBtDf35ff0D8X8D0jfdzHYEPFxAI7jJlxZXwCSez5M3190m+QobIfh+sWDWSHMCWWJN2AWamkegn6vr6YBTw==
+
+zod@^4.3.6:
+  version "4.3.6"
+  resolved "https://registry.yarnpkg.com/zod/-/zod-4.3.6.tgz#89c56e0aa7d2b05107d894412227087885ab112a"
+  integrity sha512-rftlrkhHZOcjDwkGlnUtZZkvaPHCsDATp4pGpuOOMDaTdDDXF91wuVDJoWoPsKX/3YPQ5fHuF3STjcYyKr+Qhg==