diff --git a/py_bind/optv/correspondences.pyx b/py_bind/optv/correspondences.pyx
index 88ecc8b..92c33b6 100644
--- a/py_bind/optv/correspondences.pyx
+++ b/py_bind/optv/correspondences.pyx
@@ -84,7 +84,7 @@ cdef class MatchedCoords:
         """
         cdef:
             np.ndarray[ndim=2, dtype=np.float64_t] positions
-            np.ndarray[ndim=1, dtype=np.int32_t] point_numbers
+            np.ndarray[ndim=1, dtype=np.int64_t] point_numbers
             int pt
         
         positions = np.empty((self._num_pts, 2))
@@ -97,7 +97,7 @@ cdef class MatchedCoords:
         
         return positions, point_numbers
     
-    def get_by_pnrs(self, np.ndarray[ndim=1, dtype=np.int32_t] pnrs):
+    def get_by_pnrs(self, np.ndarray[ndim=1, dtype=np.int64_t] pnrs):
         """
         Return the flat positions of points whose pnr property is given, as an
         (n,2) flat position array. Assumes all pnrs are to be found, otherwise
@@ -160,7 +160,7 @@ def correspondences(list img_pts, list flat_coords, list cals,
             num_cams * sizeof(coord_2d *))
         frame frm
         
-        np.ndarray[ndim=2, dtype=np.int32_t] clique_ids
+        np.ndarray[ndim=2, dtype=np.int64_t] clique_ids
         np.ndarray[ndim=3, dtype=np.float64_t] clique_targs
         
         # Return buffers:
diff --git a/py_bind/optv/orientation.pyx b/py_bind/optv/orientation.pyx
index 473689b..bba606f 100644
--- a/py_bind/optv/orientation.pyx
+++ b/py_bind/optv/orientation.pyx
@@ -263,7 +263,7 @@ def full_calibration(Calibration cal,
     cdef:
         vec3d *ref_coord
         np.ndarray[ndim=2, dtype=pos_t] ret
-        np.ndarray[ndim=1, dtype=np.int32_t] used
+        np.ndarray[ndim=1, dtype=np.int64_t] used
         np.ndarray[ndim=1, dtype=pos_t] err_est
         orient_par *orip
         double *residuals
@@ -298,7 +298,7 @@ def full_calibration(Calibration cal,
         raise ValueError("Orientation iteration failed, need better setup.")
     
     ret = np.empty((len(img_pts), 2))
-    used = np.empty(len(img_pts), dtype=np.int_)
+    used = np.empty(len(img_pts), dtype=np.int64)
     
     for ix in range(len(img_pts)):
         ret[ix] = (residuals[2*ix], residuals[2*ix + 1])
diff --git a/py_bind/optv/tracking_framebuf.pyx b/py_bind/optv/tracking_framebuf.pyx
index 06b5f3f..2cb0559 100644
--- a/py_bind/optv/tracking_framebuf.pyx
+++ b/py_bind/optv/tracking_framebuf.pyx
@@ -71,7 +71,7 @@ cdef class Target:
         return self._targ[0].pnr
     
     def set_pnr(self, pnr):
-        self._targ[0].pnr = pnr
+        self._targ[0].pnr = np.int32(pnr)
     
     def pos(self):
         """
diff --git a/py_bind/setup.py b/py_bind/setup.py
index 834847c..7af2452 100644
--- a/py_bind/setup.py
+++ b/py_bind/setup.py
@@ -154,10 +154,4 @@ def mk_ext(name, files):
     package_data={
         'optv': ['*.pxd', '*.c', '*.h'],
     },
-    version='0.3.0',
-    install_requires=[
-        'numpy',
-        'pyyaml',
-    ],
-    setup_requires=['numpy'],
-)
+    version='0.3.0')