diff --git a/.github/workflows/pre-commit.yml b/.github/workflows/pre-commit.yml
index b52d4af..0c5655c 100644
--- a/.github/workflows/pre-commit.yml
+++ b/.github/workflows/pre-commit.yml
@@ -9,6 +9,8 @@ jobs:
   pre-commit:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v2
-    - uses: actions/setup-python@v2
-    - uses: pre-commit/action@v2.0.0
+      - uses: actions/checkout@v2
+      - uses: actions/setup-python@v2
+        with:
+          python-version: '3.9'
+      - uses: pre-commit/action@v2.0.0
diff --git a/main.py b/main.py
index 944e57a..844ed88 100644
--- a/main.py
+++ b/main.py
@@ -6,9 +6,17 @@
 
 
 def callback(request):
+    json_data = None
+    form_data = None
+
     if request.method == "POST":
-        json_data = request.get_json()
-        form_data = request.form
+        content_type = request.headers.get("Content-Type")
+
+        if content_type == "application/json":
+            json_data = request.get_json()
+        else:
+            form_data = request.form
+
         transaction_log_service = services.TransactionLogService()
 
         try: