diff --git a/.python-version b/.python-version
new file mode 100644
index 0000000..bd28b9c
--- /dev/null
+++ b/.python-version
@@ -0,0 +1 @@
+3.9
diff --git a/requirements.txt b/requirements.txt
index d5c1ea3..147269a 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -7,7 +7,7 @@ PyMySQL
 urllib3
 uvicorn
 pydantic
-pyroute2
+pyroute2==0.7.12
 requests
 tenacity
 SQLAlchemy