diff --git a/.github/workflows/dependency-sync.yml b/.github/workflows/dependency-sync.yml
new file mode 100644
index 0000000..e859328
--- /dev/null
+++ b/.github/workflows/dependency-sync.yml
@@ -0,0 +1,25 @@
+name: Dependency sync
+
+on:
+  pull_request:
+  push:
+    branches:
+      - main
+
+jobs:
+  check-dependency-sync:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Setup Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: "3.10"
+
+      - name: Setup uv
+        uses: astral-sh/setup-uv@v3
+
+      - name: Check pyproject/requirements synchronization
+        run: ./scripts/check_requirements_sync.sh
diff --git a/README.md b/README.md
index ae34fad..cedea52 100644
--- a/README.md
+++ b/README.md
@@ -9,13 +9,25 @@ Este projeto é um chat em tempo real desenvolvido em Python utilizando a biblio
 
 ---
 
-## Requisitos
-Antes de executar o projeto, certifique-se de ter o Python instalado e instale as dependências necessárias:
+## Dependências (fonte oficial) e travamento de versões
+A **única fonte de verdade** das dependências diretas do projeto é o arquivo `pyproject.toml` na seção `[project.dependencies]`.
+
+### Fluxo oficial
+1. **Edite dependências diretas** em `pyproject.toml`.
+2. **Regenere o lock de runtime** em `requirements.txt` com:
+
+```bash
+uv pip compile pyproject.toml --python-version 3.10 --no-header -o requirements.txt
+```
+
+3. **Sincronize o ambiente local** com as versões travadas:
 
 ```bash
 pip install -r requirements.txt
 ```
 
+> O arquivo `requirements.txt` é gerado automaticamente a partir do `pyproject.toml` e não deve ser alterado manualmente.
+
 ## Como Executar
 ### Iniciar o Chat
 Para iniciar a interface do chat, execute o seguinte comando:
diff --git a/pyproject.toml b/pyproject.toml
index ecbc516..ddc2b81 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -8,7 +8,7 @@ authors = [
     { name = "Marcelo Santos", email = "a79433@ualg.pt" }
 ]
 dependencies = [
-  "flet==0.27.5"
+    "flet==0.27.5",
 ]
 
 [tool.flet]
@@ -28,14 +28,3 @@ copyright = "Copyright (C) 2025 by Marcelo Santos"
 
 [tool.flet.app]
 path = "src"
-
-[tool.uv]
-dev-dependencies = [
-    "flet[all]==0.27.5",
-]
-
-[tool.poetry]
-package-mode = false
-
-[tool.poetry.group.dev.dependencies]
-flet = {extras = ["all"], version = "0.27.5"}
\ No newline at end of file
diff --git a/scripts/check_requirements_sync.sh b/scripts/check_requirements_sync.sh
new file mode 100755
index 0000000..6f32d7f
--- /dev/null
+++ b/scripts/check_requirements_sync.sh
@@ -0,0 +1,68 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+python - <<'PY'
+from pathlib import Path
+import re
+
+pyproject_text = Path('pyproject.toml').read_text(encoding='utf-8')
+
+# Read only [project].dependencies = [ ... ] entries pinned as name==version
+in_project = False
+in_deps = False
+deps = []
+for raw in pyproject_text.splitlines():
+    line = raw.strip()
+    if line.startswith('[') and line.endswith(']'):
+        in_project = line == '[project]'
+        if line != '[project]':
+            in_deps = False
+        continue
+    if not in_project:
+        continue
+    if line.startswith('dependencies') and '[' in line:
+        in_deps = True
+        continue
+    if in_deps:
+        if ']' in line:
+            in_deps = False
+            continue
+        m = re.match(r'"([A-Za-z0-9_.-]+)==([^"\s]+)"\s*,?$', line)
+        if m:
+            deps.append((m.group(1), m.group(2)))
+
+pattern = re.compile(r'^\s*([A-Za-z0-9_.-]+)==([^\s#]+)\s*$')
+req_bytes = Path('requirements.txt').read_bytes()
+for enc in ('utf-8', 'utf-16', 'utf-16-le', 'utf-16-be'):
+    try:
+        req_text = req_bytes.decode(enc)
+        break
+    except UnicodeDecodeError:
+        continue
+else:
+    raise SystemExit('Não foi possível decodificar requirements.txt (UTF-8/UTF-16).')
+
+req_pins = {}
+for line in req_text.splitlines():
+    m = pattern.match(line)
+    if m:
+        req_pins[m.group(1).lower().replace('_', '-').replace('.', '-')] = m.group(2)
+
+missing, mismatch = [], []
+for name, exp in deps:
+    key = name.lower().replace('_', '-').replace('.', '-')
+    got = req_pins.get(key)
+    if got is None:
+        missing.append(name)
+    elif got != exp:
+        mismatch.append((name, exp, got))
+
+if missing or mismatch:
+    if missing:
+        print('Dependências diretas ausentes em requirements.txt:', ', '.join(missing))
+    for name, exp, got in mismatch:
+        print(f'Versão divergente para {name}: pyproject={exp}, requirements={got}')
+    raise SystemExit(1)
+
+print('Dependências diretas de pyproject.toml estão sincronizadas em requirements.txt.')
+PY