diff --git a/4651a1253ca5dc597550c5cd746f30dabee770bc.patch b/4651a1253ca5dc597550c5cd746f30dabee770bc.patch
new file mode 100644
index 0000000..78649a9
--- /dev/null
+++ b/4651a1253ca5dc597550c5cd746f30dabee770bc.patch
@@ -0,0 +1,68 @@
+commit 4651a1253ca5dc597550c5cd746f30dabee770bc
+Author: Jody Klymak <jklymak@gmail.com>
+Date:   Wed Sep 4 10:48:01 2019 -0700
+
+    Backport PR #15168: MNT: explicitly cast np.bool_ -> bool to prevent deprecation warning
+
+diff --git a/lib/matplotlib/axes/_base.py b/lib/matplotlib/axes/_base.py
+index ff5aaf032..c2a4d2f42 100644
+--- a/lib/matplotlib/axes/_base.py
++++ b/lib/matplotlib/axes/_base.py
+@@ -3267,7 +3267,8 @@ class _AxesBase(martist.Artist):
+         reverse = left > right
+         left, right = self.xaxis.get_major_locator().nonsingular(left, right)
+         left, right = self.xaxis.limit_range_for_scale(left, right)
+-        left, right = sorted([left, right], reverse=reverse)
++        # cast to bool to avoid bad interaction between python 3.8 and np.bool_
++        left, right = sorted([left, right], reverse=bool(reverse))
+ 
+         self.viewLim.intervalx = (left, right)
+         if auto is not None:
+@@ -3649,7 +3650,8 @@ class _AxesBase(martist.Artist):
+         reverse = bottom > top
+         bottom, top = self.yaxis.get_major_locator().nonsingular(bottom, top)
+         bottom, top = self.yaxis.limit_range_for_scale(bottom, top)
+-        bottom, top = sorted([bottom, top], reverse=reverse)
++        # cast to bool to avoid bad interaction between python 3.8 and np.bool_
++        bottom, top = sorted([bottom, top], reverse=bool(reverse))
+ 
+         self.viewLim.intervaly = (bottom, top)
+         if auto is not None:
+diff --git a/lib/matplotlib/axis.py b/lib/matplotlib/axis.py
+index a4cdffc55..e23b5748c 100644
+--- a/lib/matplotlib/axis.py
++++ b/lib/matplotlib/axis.py
+@@ -2156,7 +2156,8 @@ class XAxis(Axis):
+     def set_inverted(self, inverted):
+         # docstring inherited
+         a, b = self.get_view_interval()
+-        self.axes.set_xlim(sorted((a, b), reverse=inverted), auto=None)
++        # cast to bool to avoid bad interaction between python 3.8 and np.bool_
++        self.axes.set_xlim(sorted((a, b), reverse=bool(inverted)), auto=None)
+ 
+     def set_default_intervals(self):
+         # docstring inherited
+@@ -2463,7 +2464,8 @@ class YAxis(Axis):
+     def set_inverted(self, inverted):
+         # docstring inherited
+         a, b = self.get_view_interval()
+-        self.axes.set_ylim(sorted((a, b), reverse=inverted), auto=None)
++        # cast to bool to avoid bad interaction between python 3.8 and np.bool_
++        self.axes.set_ylim(sorted((a, b), reverse=bool(inverted)), auto=None)
+ 
+     def set_default_intervals(self):
+         # docstring inherited
+diff --git a/lib/mpl_toolkits/mplot3d/axes3d.py b/lib/mpl_toolkits/mplot3d/axes3d.py
+index 4202be9a1..047234b36 100644
+--- a/lib/mpl_toolkits/mplot3d/axes3d.py
++++ b/lib/mpl_toolkits/mplot3d/axes3d.py
+@@ -626,7 +626,8 @@ class Axes3D(Axes):
+         reverse = left > right
+         left, right = self.xaxis.get_major_locator().nonsingular(left, right)
+         left, right = self.xaxis.limit_range_for_scale(left, right)
+-        left, right = sorted([left, right], reverse=reverse)
++        # cast to bool to avoid bad interaction between python 3.8 and np.bool_
++        left, right = sorted([left, right], reverse=bool(reverse))
+         self.xy_viewLim.intervalx = (left, right)
+ 
+         if auto is not None:
diff --git a/python-matplotlib.spec b/python-matplotlib.spec
index 9013a11..ccba6d8 100644
--- a/python-matplotlib.spec
+++ b/python-matplotlib.spec
@@ -44,7 +44,7 @@
 
 Name:           python-matplotlib
 Version:        3.1.1
-Release:        1%{?rctag:.%{rctag}}%{?dist}.1
+Release:        2%{?rctag:.%{rctag}}%{?dist}
 Summary:        Python 2D plotting library
 # qt4_editor backend is MIT
 License:        Python and MIT
@@ -63,6 +63,10 @@ Patch0002:      0001-Use-packaged-jquery-and-jquery-ui.patch
 # https://github.com/matplotlib/matplotlib/pull/14901
 Patch0003:      1230e83b6793e5ccda8543f3584eb8bc2dc657e2.patch
 
+# Fix np.bool_ -> bool deprecation warnings on Python 3.8.
+# https://github.com/matplotlib/matplotlib/pull/15168
+Patch0004:      4651a1253ca5dc597550c5cd746f30dabee770bc.patch
+
 # Fedora-specific patches; see:
 # https://github.com/fedora-python/matplotlib/tree/fedora-patches
 # https://github.com/fedora-python/matplotlib/tree/fedora-patches-non-x86
@@ -264,6 +268,8 @@ Requires:       python3-matplotlib%{?_isa} = %{version}-%{release}
 
 %patch0003 -p1
 
+%patch0004 -p1
+
 # Fedora-specific patches follow:
 %patch1001 -p1
 # Updated test images for new FreeType.
@@ -451,6 +457,9 @@ PYTHONDONTWRITEBYTECODE=1 \
 
 
 %changelog
+* Fri Sep 06 2019 Elliott Sales de Andrade <quantum.analyst@gmail.com> - 3.1.1-2
+- Backport bool deprecation fix for Python 3.8
+
 * Sun Aug 18 2019 Miro Hrončok <mhroncok@redhat.com> - 3.1.1-1.1
 - Rebuilt for Python 3.8