diff --git a/.travis.yml b/.travis.yml
index 4323d4b..eb5329d 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -7,7 +7,6 @@ python:
 
 env:
   - DJANGO_VERSION: "'Django~=1.11'"
-  - DJANGO_VERSION: "'Django~=2.0'"
   - DJANGO_VERSION: "'Django~=2.1'"
   - DJANGO_VERSION: "'Django~=2.2'"
 
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 6be9cdb..74d2ec4 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -16,6 +16,7 @@ Improvements:
 - Adds `mypy` support
 - Adds `wemake-python-styleguide` support
 - Adds extra CI checks: `safety`, `doc8`
+- Adds `py.typed` file to package type information
 
 
 ## 0.3.1
diff --git a/pyproject.toml b/pyproject.toml
index 08414b8..3f1be3a 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -30,7 +30,6 @@ classifiers = [
   "Environment :: Web Environment",
   "Framework :: Django",
   "Framework :: Django :: 1.11",
-  "Framework :: Django :: 2.0",
   "Framework :: Django :: 2.1",
   "Framework :: Django :: 2.2",
   "Intended Audience :: Developers",
diff --git a/split_settings/py.typed b/split_settings/py.typed
new file mode 100644
index 0000000..e69de29
diff --git a/split_settings/tools.py b/split_settings/tools.py
index 5e220be..967e9ba 100644
--- a/split_settings/tools.py
+++ b/split_settings/tools.py
@@ -19,7 +19,7 @@
 _INCLUDED_FILE = '__included_file__'
 
 
-def optional(filename):
+def optional(filename: str) -> str:
     """
     This functions is used for compatibility reasons.
 
@@ -43,7 +43,7 @@ class _Optional(str):  # noqa: WPS600
     """
 
 
-def include(*args, **kwargs):  # noqa: WPS210, C901
+def include(*args: str, **kwargs) -> None:  # noqa: WPS210, C901
     """
     Used for including Django project settings from multiple files.