diff --git a/backend/pyproject.toml b/backend/pyproject.toml
index 3283b6f4..8f5b83ef 100644
--- a/backend/pyproject.toml
+++ b/backend/pyproject.toml
@@ -53,7 +53,7 @@ dev = [
     "pytest-asyncio>=0.24.0",
     "pytest-cov>=6.0.0",
     "httpx>=0.28.0",
-    "testcontainers[postgres]>=4.0.0",
+    "testcontainers[postgres]>=4.15.0",
     "factory-boy>=3.3.0",
     "ruff>=0.8.0",
     "mypy>=1.13.0",
diff --git a/backend/uv.lock b/backend/uv.lock
index 1a77845f..b9eabcf9 100644
--- a/backend/uv.lock
+++ b/backend/uv.lock
@@ -320,7 +320,7 @@ dev = [
     { name = "pytest-cov", specifier = ">=6.0.0" },
     { name = "respx", specifier = ">=0.23.0" },
     { name = "ruff", specifier = ">=0.8.0" },
-    { name = "testcontainers", extras = ["postgres"], specifier = ">=4.0.0" },
+    { name = "testcontainers", extras = ["postgres"], specifier = ">=4.15.0" },
 ]
 
 [[package]]