diff --git a/Makefile b/Makefile
index 4658b6f..13aaa6f 100644
--- a/Makefile
+++ b/Makefile
@@ -64,7 +64,7 @@ ifeq (Python 2.6,$(findstring Python 2.6,$(shell python -V 2>&1)))
 endif
 	$(pip) install -r requirements-travis.txt
 	$(pip) install coveralls
-	$(pip) install --allow-all-external -e .
+	$(pip) install -e .
 
 coveralls:
 	$(coveralls)
diff --git a/tox.ini b/tox.ini
index 1f5be88..412d752 100644
--- a/tox.ini
+++ b/tox.ini
@@ -4,7 +4,7 @@ skipsdist = True
 
 [testenv]
 commands =
- pip install --allow-all-external -e .
+ pip install -e .
  pytest
 passenv =
  TERM