diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 6163117..a7d5653 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -31,7 +31,7 @@ linting:pylint:
   image: $CONTAINER_REGISTRY:linting
   stage: linting
   script:
-    - pylint --disable=no-else-return,no-else-raise,no-else-continue,unnecessary-comprehension,raise-missing-from,unsubscriptable-object --extension-pkg-whitelist=cairo,gi ./libmat2 ./mat2
+    - pylint --disable=no-else-return,no-else-raise,no-else-continue,unnecessary-comprehension,raise-missing-from,unsubscriptable-object,use-dict-literal,unspecified-encoding,consider-using-f-string,use-list-literal --extension-pkg-whitelist=cairo,gi ./libmat2 ./mat2
     # Once nautilus-python is in Debian, decomment it form the line below
     - pylint --disable=no-else-return,no-else-raise,no-else-continue,unnecessary-comprehension,raise-missing-from,unsubscriptable-object --extension-pkg-whitelist=Nautilus,GObject,Gtk,Gio,GLib,gi ./nautilus/mat2.py
 
diff --git a/libmat2/epub.py b/libmat2/epub.py
index af059d2..be05562 100644
--- a/libmat2/epub.py
+++ b/libmat2/epub.py
@@ -108,7 +108,7 @@ class EPUBParser(archive.ZipParser):
                 item.append(uniqid)
 
                 # items without mandatory content
-                for name in {'language', 'title'}:
+                for name in ['language', 'title']:
                     uniqid = ET.Element(self.metadata_namespace + name)
                     item.append(uniqid)
                 break  # there is only a single <metadata> block
diff --git a/libmat2/video.py b/libmat2/video.py
index b4a3232..ae9e463 100644
--- a/libmat2/video.py
+++ b/libmat2/video.py
@@ -50,7 +50,7 @@ class AbstractFFmpegParser(exiftool.ExiftoolParser):
 
         ret = dict()  # type: Dict[str, Union[str, dict]]
         for key, value in meta.items():
-            if key in self.meta_key_value_allowlist.keys():
+            if key in self.meta_key_value_allowlist:
                 if value == self.meta_key_value_allowlist[key]:
                     continue
             ret[key] = value