diff --git a/requirements-dev.txt b/requirements-dev.txt
index 096d0570..4ae422ed 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -10,5 +10,6 @@ mypy
 pyyaml
 httpx
 fastapi
+pydantic
 
 -r requirements-ext.txt
diff --git a/setup.py b/setup.py
index 43d6d5b6..0378326d 100644
--- a/setup.py
+++ b/setup.py
@@ -64,6 +64,9 @@ setup(name='dependency-injector',
           'yaml': [
               'pyyaml',
           ],
+          'pydantic': [
+              'pydantic',
+          ],
           'flask': [
               'flask',
           ],
diff --git a/tox.ini b/tox.ini
index da86a4d5..f1ceadd9 100644
--- a/tox.ini
+++ b/tox.ini
@@ -11,6 +11,7 @@ deps=
     fastapi
 extras=
     yaml
+    pydantic
     flask
     aiohttp
 commands=
@@ -36,6 +37,7 @@ deps=
     unittest2
 extras=
     yaml
+    pydantic
     flask
 commands=
     unit2 discover -s tests/unit -p test_*_py2_py3.py
@@ -53,6 +55,7 @@ deps=
     unittest2
 extras=
     yaml
+    pydantic
     flask
 commands=
     unit2 discover -s tests/unit -p test_*_py3.py
@@ -62,6 +65,7 @@ deps=
     unittest2
 extras=
     yaml
+    pydantic
     flask
 commands=
     unit2 discover -s tests/unit -p test_*_py2_py3.py