diff --git a/.github/workflows/pre-commit.yml b/.github/workflows/pre-commit.yml
index ad71791..3c33db3 100644
--- a/.github/workflows/pre-commit.yml
+++ b/.github/workflows/pre-commit.yml
@@ -9,6 +9,6 @@ jobs:
   pre-commit:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v3
-    - uses: actions/setup-python@v4
-    - uses: pre-commit/action@v3.0.0
+      - uses: actions/checkout@v3
+      - uses: actions/setup-python@v4
+      - uses: pre-commit/action@v3.0.0
diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index ac785b6..8f48746 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -1,37 +1,43 @@
 # See https://pre-commit.com for more information
 # See https://pre-commit.com/hooks.html for more hooks
 repos:
-- repo: https://github.com/maxwinterstein/shfmt-py
-  rev: v3.4.3.1
-  hooks:
-  - id: shfmt
-    exclude: examples/t6.sh
-    args: ["-w", "-i", "4", "-ci"]
+  - repo: https://github.com/maxwinterstein/shfmt-py
+    rev: v3.4.3.1
+    hooks:
+      - id: shfmt
+        exclude: examples/t6.sh
+        args: ["-w", "-i", "4", "-ci"]
 
-- repo: https://github.com/pre-commit/pre-commit-hooks
-  rev: v4.3.0
-  hooks:
-  - id: trailing-whitespace
-  - id: end-of-file-fixer
+  - repo: https://github.com/pre-commit/pre-commit-hooks
+    rev: v4.3.0
+    hooks:
+      - id: trailing-whitespace
+      - id: end-of-file-fixer
 
-- repo: https://github.com/psf/black
-  rev: 23.1a1
-  hooks:
-  - id: black
+  - repo: https://github.com/psf/black
+    rev: 23.1a1
+    hooks:
+      - id: black
 
-- repo: https://github.com/asottile/pyupgrade
-  rev: v3.3.1
-  hooks:
-  - id: pyupgrade
-    args: ["--py37-plus"]
+  - repo: https://github.com/asottile/pyupgrade
+    rev: v3.3.1
+    hooks:
+      - id: pyupgrade
+        args: ["--py37-plus"]
 
-- repo: https://github.com/pycqa/flake8
-  rev: 5.0.4  # 6.0.0 requires Python 3.8
-  hooks:
-  - id: flake8
+  - repo: https://github.com/pycqa/flake8
+    rev: 5.0.4  # 6.0.0 requires Python 3.8
+    hooks:
+      - id: flake8
 
-- repo: https://github.com/pycqa/isort
-  rev: 5.12.0
-  hooks:
-  - id: isort
-    name: isort (python)
+  - repo: https://github.com/pycqa/isort
+    rev: 5.12.0
+    hooks:
+      - id: isort
+        name: isort (python)
+
+  - repo: https://github.com/adrienverge/yamllint.git
+    rev: v1.29.0
+    hooks:
+      - id: yamllint
+        args: [--strict]
diff --git a/.yamllint b/.yamllint
new file mode 100644
index 0000000..cfe6bac
--- /dev/null
+++ b/.yamllint
@@ -0,0 +1,9 @@
+---
+extends: default
+
+rules:
+  document-start: disable
+  truthy:
+    check-keys: false
+  line-length:
+    max: 120
diff --git a/builder/configs/trex_cfg.yaml b/builder/configs/trex_cfg.yaml
index bf53ea0..2d3b026 100644
--- a/builder/configs/trex_cfg.yaml
+++ b/builder/configs/trex_cfg.yaml
@@ -7,14 +7,14 @@
   # something with running on AWS.
   limit_memory: 1024
   port_info:
-      - ip: 192.168.1.1
-        default_gw: 192.168.2.1
-      - ip: 192.168.2.1
-        default_gw: 192.168.1.1
+    - ip: 192.168.1.1
+      default_gw: 192.168.2.1
+    - ip: 192.168.2.1
+      default_gw: 192.168.1.1
 
   platform:
-      master_thread_id: 0
-      latency_thread_id: 1
-      dual_if:
-        - socket: 0
-          threads: [4,5,6,7,8,9,10,11,12,13,14,15]
+    master_thread_id: 0
+    latency_thread_id: 1
+    dual_if:
+      - socket: 0
+        threads: [4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15]