diff --git a/setup.py b/setup.py
index 3a499f5..d0ac8b0 100644
--- a/setup.py
+++ b/setup.py
@@ -6,7 +6,8 @@ from setuptools import setup, find_packages
 with open('README.md') as readme:
     long_description = readme.read()
 
-version = __import__('gooey').__version__
+with open('version.txt', 'r') as f:
+    version = f.read()
 
 setup(
     name='Gooey',
@@ -19,7 +20,7 @@ setup(
     license='MIT',
     packages=find_packages(),
     install_requires=[
-        'wxpython==5.7',
+        'wxpython==4.0.0b1',
         'Rx==1.5.9'
     ],
     include_package_data=True,
diff --git a/version.txt b/version.txt
new file mode 100644
index 0000000..9e11c3b
--- /dev/null
+++ b/version.txt
@@ -0,0 +1 @@
+2.0.0