diff --git a/.bumpversion.cfg b/.bumpversion.cfg
index a80a8506..f828f1ce 100644
--- a/.bumpversion.cfg
+++ b/.bumpversion.cfg
@@ -1,5 +1,5 @@
 [bumpversion]
-current_version = 3.1.0a0
+current_version = 3.1.0b0
 commit = False
 tag = False
 
diff --git a/README.md b/README.md
index 368f8303..119f74ba 100644
--- a/README.md
+++ b/README.md
@@ -12,11 +12,10 @@ a query language for APIs created by Facebook.
 [![Python 3 Status](https://pyup.io/repos/github/graphql-python/graphql-core-next/python-3-shield.svg)](https://pyup.io/repos/github/graphql-python/graphql-core-next/)
 [![Code Style](https://img.shields.io/badge/code%20style-black-000000.svg)](https://github.com/ambv/black)
 
-The current stable version 3.0.2 of GraphQL-core is up-to-date
-with GraphQL.js version 14.6.0.
+The current stable version 3.0.3 of GraphQL-core is up-to-date with
+GraphQL.js version 14.6.0.
 
-All parts of the API are covered by an extensive test suite
-with over 2000 unit tests.
+All parts of the API are covered by an extensive test suite with over 2000 unit tests.
 
 
 ## Documentation
diff --git a/docs/conf.py b/docs/conf.py
index 6168f295..7a7229aa 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -51,7 +51,7 @@
 
 # General information about the project.
 project = 'GraphQL-core 3'
-copyright = '2019, Christoph Zwerschke'
+copyright = '2020, Christoph Zwerschke'
 author = 'Christoph Zwerschke'
 
 # The version info for the project you're documenting, acts as replacement for
@@ -59,9 +59,9 @@
 # built documents.
 #
 # The short X.Y version.
-# version = '3.0'
+# version = '3.1'
 # The full version, including alpha/beta/rc tags.
-version = release = '3.1.0a0'
+version = release = '3.1.0b0'
 
 # The language for content autogenerated by Sphinx. Refer to documentation
 # for a list of supported languages.
@@ -180,7 +180,7 @@
 # The name for this set of Sphinx documents.
 # "<project> v<release> documentation" by default.
 #
-# html_title = 'GraphQL-core v3.0.0'
+# html_title = 'GraphQL-core v3.1.0'
 
 # A shorter title for the navigation bar.  Default is the same as html_title.
 #
diff --git a/pyproject.toml b/pyproject.toml
index d26283d5..b50553b3 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "graphql-core"
-version = "3.1.0a0"
+version = "3.1.0b0"
 description = """
 GraphQL-core is a Python port of GraphQL.js,
  the JavaScript reference implementation for GraphQL."""
diff --git a/src/graphql/version.py b/src/graphql/version.py
index 64327fd4..bed79cdc 100644
--- a/src/graphql/version.py
+++ b/src/graphql/version.py
@@ -4,7 +4,7 @@
 __all__ = ["version", "version_info", "version_js", "version_info_js"]
 
 
-version = "3.1.0a0"
+version = "3.1.0b0"
 
 version_js = "15.0.0c1"