diff --git a/tests/pipeline/test_technical.py b/tests/pipeline/test_technical.py
index 505e1f38..a386f7f3 100644
--- a/tests/pipeline/test_technical.py
+++ b/tests/pipeline/test_technical.py
@@ -158,8 +158,8 @@ class TestFastStochasticOscillator(ZiplineTestCase):
         fso = FastStochasticOscillator()
 
         today = pd.Timestamp('2015')
-        assets = np.arange(3, dtype=np.float)
-        out = np.empty(shape=(3,), dtype=np.float)
+        assets = np.arange(3, dtype=np.float64)
+        out = np.empty(shape=(3,), dtype=np.float64)
 
         highs = np.full((50, 3), 3)
         lows = np.full((50, 3), 2)