diff --git a/backend/pyproject.toml b/backend/pyproject.toml
index 370d75d..6eb6ddb 100644
--- a/backend/pyproject.toml
+++ b/backend/pyproject.toml
@@ -43,7 +43,7 @@ dependencies = [
 
 [project.optional-dependencies]
 dev = [
-    "pytest==8.3.4",
+    "pytest==9.1.1",
     "pytest-asyncio==0.24.0",
     "pytest-cov==6.0.0",
     "pytest-mock==3.14.0",
diff --git a/backend/requirements-dev.txt b/backend/requirements-dev.txt
index d84d648..8e80431 100644
--- a/backend/requirements-dev.txt
+++ b/backend/requirements-dev.txt
@@ -1,6 +1,6 @@
 -r requirements.txt
 
-pytest==8.3.4
+pytest==9.1.1
 pytest-asyncio==0.24.0
 pytest-cov==6.0.0
 pytest-mock==3.14.0