diff --git a/setup.py b/setup.py
index fc8c63ee..aa189fa7 100644
--- a/setup.py
+++ b/setup.py
@@ -24,7 +24,7 @@
 
 setuptools.setup(
     name="text_extensions_for_pandas",
-    version="0.1b3",
+    version="0.1b4",
     author="IBM",
     author_email="frreiss@example.com",
     description="Natural language processing support for Pandas dataframes.",
@@ -40,5 +40,5 @@
         "Operating System :: OS Independent",
         "Topic :: Scientific/Engineering",
     ],
-    python_requires='>=3.7',
+    python_requires='>=3.6',
 )