diff --git a/.github/workflows/testing.yaml b/.github/workflows/testing.yaml
index 088d47b..efef044 100644
--- a/.github/workflows/testing.yaml
+++ b/.github/workflows/testing.yaml
@@ -5,10 +5,10 @@ on: [push]
 jobs:
   build:
 
-    runs-on: ubuntu-latest
+    runs-on: 'ubuntu-latest'
     strategy:
       matrix:
-        python-version: ['3.7', '3.8', '3.9', '3.10', '3.11', '3.12']
+        python-version: ['3.8', '3.9', '3.10', '3.11', '3.12', '3.13']
 
     steps:
       - uses: actions/checkout@v3
diff --git a/examples/upload_files.py b/examples/upload_files.py
index 6cc4cb3..5a7efcc 100644
--- a/examples/upload_files.py
+++ b/examples/upload_files.py
@@ -43,7 +43,7 @@ async def upload_hashes(queue, apikey):
   async with vt.Client(apikey) as client:
     while not queue.empty():
       file_path = await queue.get()
-      with open(file_path, encoding="utf-8") as f:
+      with open(file_path, 'rb') as f:
         analysis = await client.scan_file_async(file=f)
         print(f"File {file_path} uploaded.")
         queue.task_done()