diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index c14f4d1..209a829 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -9,6 +9,8 @@ bandit:
   script:  # TODO: remove B405 and B314
   - apt-get -qqy update
   - apt-get -qqy install --no-install-recommends python3-bandit
+  - bandit ./mat2 --format txt
+  - bandit -r ./nautilus/ --format txt
   - bandit -r ./libmat2 --format txt --skip B101,B404,B603,B405,B314
 
 pylint:
@@ -16,14 +18,16 @@ pylint:
   script:
   - apt-get -qqy update
   - apt-get -qqy install --no-install-recommends pylint3 python3-mutagen python3-gi-cairo gir1.2-poppler-0.18 gir1.2-gdkpixbuf-2.0
-  - pylint3 --extension-pkg-whitelist=cairo,gi ./libmat2
+  - pylint3 --extension-pkg-whitelist=cairo,gi ./libmat2 ./mat2
+  # Once nautilus-python is in Debian, decomment it form the line below
+  - pylint3 --extension-pkg-whitelist=Nautilus,GObject,Gtk,Gio,GLib,gi ./nautilus/nautilus_mat2.py
 
 pyflakes:
   stage: linting
   script:
   - apt-get -qqy update
   - apt-get -qqy install --no-install-recommends pyflakes3
-  - pyflakes3 ./libmat2 ./mat2 ./tests/
+  - pyflakes3 ./libmat2 ./mat2 ./tests/ ./nautilus
 
 mypy:
   stage: linting
@@ -32,6 +36,7 @@ mypy:
   - apt-get -qqy install --no-install-recommends python3-pip
   - pip3 install mypy
   - mypy mat2 libmat2/*.py --ignore-missing-imports
+  - mypy --ignore-missing-imports ./nautilus/nautilus_mat2.py
 
 tests:debian:
   stage: test
diff --git a/mat2 b/mat2
index 29d653b..5942d84 100755
--- a/mat2
+++ b/mat2
@@ -16,7 +16,7 @@ except ValueError as e:
 
 __version__ = '0.2.0'
 
-def __check_file(filename: str, mode: int = os.R_OK) -> bool:
+def __check_file(filename: str, mode: int=os.R_OK) -> bool:
     if not os.path.exists(filename):
         print("[-] %s is doesn't exist." % filename)
         return False
@@ -37,7 +37,7 @@ def create_arg_parser():
     parser.add_argument('-l', '--list', action='store_true',
                         help='list all supported fileformats')
     parser.add_argument('-c', '--check-dependencies', action='store_true',
-                      help='check if MAT2 has all the dependencies it needs')
+                        help='check if MAT2 has all the dependencies it needs')
 
 
     info = parser.add_mutually_exclusive_group()
diff --git a/nautilus/nautilus_mat2.py b/nautilus/nautilus_mat2.py
index 8828989..09c22e5 100644
--- a/nautilus/nautilus_mat2.py
+++ b/nautilus/nautilus_mat2.py
@@ -1,6 +1,6 @@
 #!/usr/bin/env python3
 
-# pylint: disable=unused-argument,len-as-condition,arguments-differ
+# pylint: disable=unused-argument,arguments-differ,no-self-use,no-name-in-module,import-error
 
 """
 Because writing GUI is non-trivial (cf. https://0xacab.org/jvoisin/mat2/issues/3),