diff --git a/requirements.txt b/requirements.txt
index 75ea30c..987eefd 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,5 +1,5 @@
 dicompyler-core[image]>=0.5.2
 wxPython>=4.0.0b2
-matplotlib>=1.3
+matplotlib>=1.3,<2.2
 numpy>=1.13.1
 https://github.com/darcymason/pydicom/archive/master.zip
diff --git a/setup.py b/setup.py
index eedd472..6458d51 100755
--- a/setup.py
+++ b/setup.py
@@ -10,7 +10,7 @@
 from setuptools import setup, find_packages
 
 requires = [
-    'matplotlib>=1.3.0',
+    'matplotlib>=1.3.0,<2.2',
     'numpy>=1.2.1',
     'pillow>=1.0',
     'dicompyler-core>=0.5.2',