diff --git a/requirements-dev.txt b/requirements-dev.txt
index a4ef3a948..4ab1e0c51 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -2,7 +2,7 @@ mock==4.0.3
 nose2[coverage_plugin]==0.10.0
 cov-core==1.15.0
 pycodestyle==2.7.0
-pylint==2.8.3
+pylint==2.9.3
 splinter==0.14.0
 transifex-client==0.14.2
 selenium==3.141.0
diff --git a/searx/preferences.py b/searx/preferences.py
index b63bd446b..e4a2ebecd 100644
--- a/searx/preferences.py
+++ b/searx/preferences.py
@@ -179,7 +179,7 @@ class SearchLanguageSetting(EnumStringSetting):
         if data not in self.choices and data != self.value:  # pylint: disable=no-member
             # hack to give some backwards compatibility with old language cookies
             data = str(data).replace('_', '-')
-            lang = data.split('-')[0]
+            lang = data.split('-', maxsplit=1)[0]
             # pylint: disable=no-member
             if data in self.choices:
                 pass
@@ -503,6 +503,7 @@ class Preferences:
         """Save cookie in the HTTP reponse obect
         """
         for user_setting_name, user_setting in self.key_value_settings.items():
+            # pylint: disable=unnecessary-dict-index-lookup
             if self.key_value_settings[user_setting_name].locked:
                 continue
             user_setting.save(user_setting_name, resp)
diff --git a/searx/search/checker/__main__.py b/searx/search/checker/__main__.py
index 7a85347cc..e1de860b7 100644
--- a/searx/search/checker/__main__.py
+++ b/searx/search/checker/__main__.py
@@ -34,8 +34,16 @@ else:
     BLACK, RED, GREEN, YELLOW, BLUE, MAGENTA, CYAN, WHITE = "", "", "", "", "", "", "", ""
 
 # equivalent of 'python -u' (unbuffered stdout, stderr)
-stdout = io.TextIOWrapper(open(sys.stdout.fileno(), 'wb', 0), write_through=True)
-stderr = io.TextIOWrapper(open(sys.stderr.fileno(), 'wb', 0), write_through=True)
+stdout = io.TextIOWrapper(
+    # pylint: disable=consider-using-with
+    open(sys.stdout.fileno(), 'wb', 0),
+    write_through=True
+)
+stderr = io.TextIOWrapper(
+    # pylint: disable=consider-using-with
+    open(sys.stderr.fileno(), 'wb', 0)
+    , write_through=True
+)
 
 
 # iterator of processors
diff --git a/searx/search/processors/__init__.py b/searx/search/processors/__init__.py
index d5ebdb70c..b3d121f0e 100644
--- a/searx/search/processors/__init__.py
+++ b/searx/search/processors/__init__.py
@@ -17,7 +17,7 @@ __all__ = [
 import threading
 
 from searx import logger
-import searx.engines as engines
+from searx import engines
 
 from .online import OnlineProcessor
 from .offline import OfflineProcessor
diff --git a/searx/webapp.py b/searx/webapp.py
index 6a3562c1c..4d838062b 100755
--- a/searx/webapp.py
+++ b/searx/webapp.py
@@ -433,6 +433,7 @@ def _get_ordered_categories():
 def _get_enable_categories(all_categories):
     disabled_engines = request.preferences.engines.get_disabled()
     enabled_categories = set(
+        # pylint: disable=consider-using-dict-items
         category for engine_name in engines
         for category in engines[engine_name].categories
         if (engine_name, category) not in disabled_engines
@@ -947,7 +948,8 @@ def preferences():
     )
 
     engines_by_category = {}
-    for c in categories:
+
+    for c in categories: # pylint: disable=consider-using-dict-items
         engines_by_category[c] = [e for e in categories[c] if e.name in filtered_engines]
         # sort the engines alphabetically since the order in settings.yml is meaningless.
         list.sort(engines_by_category[c], key=lambda e: e.name)