diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index d8617af..5f5eae7 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -1,6 +1,10 @@
 name: searx-instances
 
-on: [push, pull_request]
+on:
+  push:
+    branches: ["master"]
+  pull_request:
+    branches: ["master"]
 
 jobs:
   build:
diff --git a/Makefile b/Makefile
index e7fe5d3..ffded4c 100644
--- a/Makefile
+++ b/Makefile
@@ -1,7 +1,7 @@
 ROOT_DIR:=$(shell dirname $(realpath $(lastword $(MAKEFILE_LIST))))
 
 install:
-	python -m pip install --upgrade pip
+	python -m pip install --upgrade pip wheel setuptools
 	pip install -r requirements.txt
 
 install-update:
diff --git a/pytest.ini b/pytest.ini
new file mode 100644
index 0000000..641c4b5
--- /dev/null
+++ b/pytest.ini
@@ -0,0 +1,2 @@
+[pytest]
+asyncio_mode = strict
diff --git a/requirements-dev.txt b/requirements-dev.txt
index 98d14bc..9714711 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -1,5 +1,5 @@
-pylint==2.8.3
-pytest==6.2.4
-pytest-asyncio==0.15.1
-pytest-cov==2.12.1
-flake8==3.9.2
+pylint==2.13.8
+pytest==7.1.2
+pytest-asyncio==0.18.3
+pytest-cov==3.0.0
+flake8==4.0.1
diff --git a/requirements-update.txt b/requirements-update.txt
index ee5347e..7d09213 100644
--- a/requirements-update.txt
+++ b/requirements-update.txt
@@ -1,2 +1,2 @@
-httpx==0.18.1
-GitPython==3.1.17
+httpx==0.22.0
+GitPython==3.1.27
diff --git a/requirements.txt b/requirements.txt
index ed964e6..40edc2e 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,2 +1,2 @@
-pyyaml==5.4.1
-rfc3986==1.5.0
+pyyaml==6.0
+rfc3986==2.0.0
diff --git a/searxinstances/__version__.py b/searxinstances/__version__.py
index 487c85a..dfa27d9 100644
--- a/searxinstances/__version__.py
+++ b/searxinstances/__version__.py
@@ -1,3 +1,3 @@
 __title__ = "searxinstances"
 __description__ = "SearXNG & searx instances."
-__version__ = "0.0.2"
+__version__ = "0.0.3"
diff --git a/searxinstances/check.py b/searxinstances/check.py
index bc108f9..9bae908 100644
--- a/searxinstances/check.py
+++ b/searxinstances/check.py
@@ -9,12 +9,13 @@ def run_instance_diff(content_after: str):
     with tempfile.NamedTemporaryFile(delete=False) as tmpfile:
         tmpfile.write(content_after)
         tmpfile.flush()
-    subprocess.Popen(['diff', tmpfile.name, model.FILENAME])
+    with subprocess.Popen(['diff', tmpfile.name, model.FILENAME]):
+        pass
 
 
 def check():
     print(f'Checking {model.FILENAME}')
-    with open(model.FILENAME, 'r') as input_file:
+    with open(model.FILENAME, 'r', encoding='utf-8') as input_file:
         content = input_file.read()
     instance_list = model.yaml_load(content)
     content_after = model.yaml_dump(instance_list)
diff --git a/searxinstances/model.py b/searxinstances/model.py
index bdd4abe..a9c617a 100644
--- a/searxinstances/model.py
+++ b/searxinstances/model.py
@@ -228,7 +228,7 @@ def yaml_load(content: str) -> InstanceList:
 
 
 def load(filename: str = FILENAME) -> InstanceList:
-    with open(filename, 'r') as input_file:
+    with open(filename, 'r', encoding='utf-8') as input_file:
         instance_list = yaml.load(input_file, Loader=ILLoader)
         assert isinstance(instance_list, InstanceList)
         return instance_list
@@ -236,7 +236,7 @@ def load(filename: str = FILENAME) -> InstanceList:
 
 def save(instance_list: InstanceList, filename: str = FILENAME):
     output_content = yaml_dump(instance_list)
-    with open(filename, 'w') as output_file:
+    with open(filename, 'w', encoding='utf-8') as output_file:
         output_file.write(output_content)
 
 
diff --git a/searxinstances/utils/editor.py b/searxinstances/utils/editor.py
index cc05f5a..21579d7 100644
--- a/searxinstances/utils/editor.py
+++ b/searxinstances/utils/editor.py
@@ -67,9 +67,9 @@ def get_editor_args(editor):
 def get_default_editors():
     sys_platform = sys.platform
 
-    for platform in EDITORS:
+    for platform, editor in EDITORS.items():
         if sys_platform.startswith(platform):
-            return EDITORS[platform]
+            return editor
 
     return COMMON_EDITORS