diff --git a/src/zipline/_protocol.pxd b/src/zipline/_protocol.pxd
index e93e3b9a94..20c57ad283 100644
--- a/src/zipline/_protocol.pxd
+++ b/src/zipline/_protocol.pxd
@@ -1,5 +1,5 @@
 cimport numpy as np
-
+import numpy; numpy.import_array()
 from zipline.assets._assets cimport Asset
 
 
diff --git a/src/zipline/assets/_assets.pyx b/src/zipline/assets/_assets.pyx
index 50a2e6bbea..69de80f504 100644
--- a/src/zipline/assets/_assets.pyx
+++ b/src/zipline/assets/_assets.pyx
@@ -33,6 +33,7 @@ import numpy as np
 from numpy cimport int64_t
 import warnings
 cimport numpy as np
+import numpy; numpy.import_array()
 
 from zipline.utils.calendar_utils import get_calendar
 
diff --git a/src/zipline/assets/continuous_futures.pyx b/src/zipline/assets/continuous_futures.pyx
index f673a3ce07..496b879a0f 100644
--- a/src/zipline/assets/continuous_futures.pyx
+++ b/src/zipline/assets/continuous_futures.pyx
@@ -27,7 +27,7 @@ from cpython.object cimport (
     Py_LT,
 )
 from cpython cimport bool
-
+import numpy; numpy.import_array()
 from functools import partial
 
 from numpy import array, empty, iinfo
diff --git a/src/zipline/data/_adjustments.pyx b/src/zipline/data/_adjustments.pyx
index a85ba462c1..458bc17618 100644
--- a/src/zipline/data/_adjustments.pyx
+++ b/src/zipline/data/_adjustments.pyx
@@ -25,6 +25,8 @@ from numpy import (
     zeros,
 )
 from numpy cimport float64_t, int64_t, ndarray
+import numpy
+numpy.import_array()
 from pandas import Timestamp
 
 ctypedef object Timestamp_t
diff --git a/src/zipline/data/_equities.pyx b/src/zipline/data/_equities.pyx
index a052804964..784e2351f6 100644
--- a/src/zipline/data/_equities.pyx
+++ b/src/zipline/data/_equities.pyx
@@ -32,7 +32,7 @@ from numpy cimport (
     uint8_t,
 )
 from numpy.math cimport NAN
-
+import numpy; numpy.import_array()
 ctypedef object carray_t
 ctypedef object ctable_t
 ctypedef object Timestamp_t
diff --git a/src/zipline/data/_minute_bar_internal.pyx b/src/zipline/data/_minute_bar_internal.pyx
index 8dee07b2da..76788f5aa7 100644
--- a/src/zipline/data/_minute_bar_internal.pyx
+++ b/src/zipline/data/_minute_bar_internal.pyx
@@ -1,4 +1,5 @@
 from numpy cimport ndarray, int64_t
+import numpy; numpy.import_array()
 from numpy import searchsorted
 from cpython cimport bool
 cimport cython
diff --git a/src/zipline/data/_resample.pyx b/src/zipline/data/_resample.pyx
index 22bd9f8d32..d79771890f 100644
--- a/src/zipline/data/_resample.pyx
+++ b/src/zipline/data/_resample.pyx
@@ -14,6 +14,7 @@
 from cython cimport boundscheck, wraparound
 from numpy import finfo, float64, nan, isnan
 from numpy cimport intp_t, float64_t, uint32_t
+import numpy; numpy.import_array()
 
 @boundscheck(False)
 @wraparound(False)
diff --git a/src/zipline/gens/sim_engine.pyx b/src/zipline/gens/sim_engine.pyx
index b15a70fcc9..a8eb51bc24 100644
--- a/src/zipline/gens/sim_engine.pyx
+++ b/src/zipline/gens/sim_engine.pyx
@@ -15,6 +15,7 @@
 
 cimport cython
 cimport numpy as np
+import numpy; numpy.import_array()
 import numpy as np
 import pandas as pd
 from cpython cimport bool
diff --git a/src/zipline/lib/_factorize.pyx b/src/zipline/lib/_factorize.pyx
index 6774286740..5e269d2392 100644
--- a/src/zipline/lib/_factorize.pyx
+++ b/src/zipline/lib/_factorize.pyx
@@ -5,6 +5,7 @@ from cpython cimport Py_LT
 from libc.math cimport log
 cimport numpy as np
 import numpy as np
+np.import_array()
 
 from zipline.utils.numpy_utils import unsigned_int_dtype_with_size_in_bytes
 
diff --git a/src/zipline/lib/_float64window.pyx b/src/zipline/lib/_float64window.pyx
index 1747b014e3..07c279d625 100644
--- a/src/zipline/lib/_float64window.pyx
+++ b/src/zipline/lib/_float64window.pyx
@@ -2,6 +2,7 @@
 float specialization of AdjustedArrayWindow
 """
 from numpy cimport float64_t
+import numpy; numpy.import_array()
 ctypedef float64_t[:, :] databuffer
 
 include "_windowtemplate.pxi"
diff --git a/src/zipline/lib/_int64window.pyx b/src/zipline/lib/_int64window.pyx
index d30b97cac4..84b8b56467 100644
--- a/src/zipline/lib/_int64window.pyx
+++ b/src/zipline/lib/_int64window.pyx
@@ -2,6 +2,7 @@
 datetime specialization of AdjustedArrayWindow
 """
 from numpy cimport int64_t
+import numpy; numpy.import_array()
 
 ctypedef int64_t[:, :] databuffer
 
diff --git a/src/zipline/lib/_uint8window.pyx b/src/zipline/lib/_uint8window.pyx
index 8b8ce98b2b..7e2aeb4756 100644
--- a/src/zipline/lib/_uint8window.pyx
+++ b/src/zipline/lib/_uint8window.pyx
@@ -2,6 +2,7 @@
 bool specialization of AdjustedArrayWindow
 """
 from numpy cimport uint8_t
+import numpy; numpy.import_array()
 
 ctypedef uint8_t[:, :] databuffer
 
diff --git a/src/zipline/lib/adjustment.pyx b/src/zipline/lib/adjustment.pyx
index bd0e4794ea..71c4872fb4 100644
--- a/src/zipline/lib/adjustment.pyx
+++ b/src/zipline/lib/adjustment.pyx
@@ -6,6 +6,7 @@ from pandas import isnull, Timestamp
 cimport numpy as np
 from numpy cimport float64_t, uint8_t, int64_t
 from numpy import asarray, datetime64, float64, int64, bool_, uint8
+import numpy; numpy.import_array()
 
 from zipline.utils.compat import unicode
 
diff --git a/src/zipline/lib/rank.pyx b/src/zipline/lib/rank.pyx
index 1a45e54724..d807276d3b 100644
--- a/src/zipline/lib/rank.pyx
+++ b/src/zipline/lib/rank.pyx
@@ -3,7 +3,7 @@ Functions for ranking and sorting.
 """
 cimport cython
 cimport numpy as np
-
+import numpy; numpy.import_array()
 import numpy as np
 from cpython cimport bool
 from scipy.stats import rankdata