diff --git a/.travis.yml b/.travis.yml
index c5fb91b..20d628d 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -8,4 +8,5 @@ install:
   - pip install xtermcolor
 
 script:
+  - make mypy
   - make test
diff --git a/Makefile b/Makefile
index 4741ed2..c11c765 100644
--- a/Makefile
+++ b/Makefile
@@ -15,6 +15,9 @@ relational_gui/rel_edit.py:
 relational_gui/resources.py:
 	pyrcc5 relational_gui/resources.qrc > relational_gui/resources.py
 
+.PHONY: mypy
+mypy:
+	mypy relational
 
 .PHONY: test
 test: