diff --git a/requirements.txt b/requirements.txt
index bb02715..febb472 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -10,3 +10,4 @@ pytest>=8.0.0
 pytest-asyncio>=0.23.0  # Required for async tests
 pytest-cov>=4.1.0       # Required for coverage reporting
 httpx>=0.27.0           # Required for FastAPI TestClient
+polib>=1.2.0            # Required for i18n tests