diff --git a/setup.cfg b/setup.cfg
index b892b0a..152fe27 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -69,7 +69,7 @@ exclude =
 [mypy]
 allow_incomplete_defs = False
 allow_untyped_defs = False
-ignore_missing_imports = True
+ignore_missing_imports = False
 no_implicit_optional = True
 implicit_reexport = False
 local_partial_types = True
diff --git a/tox.ini b/tox.ini
index 9a476a1..7ded1f6 100644
--- a/tox.ini
+++ b/tox.ini
@@ -23,6 +23,7 @@ commands =
 [testenv:typing]
 deps =
     mypy
+    types-jsonschema
     types-requests
 extras = test
 commands =