diff --git a/CMakeLists.txt b/CMakeLists.txt
index 9b86a729b..2c6e4f823 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -96,9 +96,9 @@ set(RDK_PYTHON_OUTPUT_DIRECTORY "${CMAKE_CURRENT_BINARY_DIR}/rdkit")
 #-------
 # Config variables:
 set(RDKit_Year "2019")
-set(RDKit_Month "03")
+set(RDKit_Month "09")
 set(RDKit_Revision "1")
-set(RDKit_RevisionModifier "")
+set(RDKit_RevisionModifier "dev1")
 set(RDKit_ABI "1")
 
 # we need an integer version of the month later, so remove the zero padding
diff --git a/Docs/Book/conf.py b/Docs/Book/conf.py
index c5dd7a125..1549156a1 100644
--- a/Docs/Book/conf.py
+++ b/Docs/Book/conf.py
@@ -47,16 +47,16 @@ master_doc = 'index'
 
 # General information about the project.
 project = u'The RDKit'
-copyright = u'2018, Greg Landrum'
+copyright = u'2019, Greg Landrum'
 
 # The version info for the project you're documenting, acts as replacement for
 # |version| and |release|, also used in various other places throughout the
 # built documents.
 #
 # The short X.Y version.
-version = '2019.03'
+version = '2019.09'
 # The full version, including alpha/beta/rc tags.
-release = '2019.03.1'
+release = '2019.09.1'
 
 # The language for content autogenerated by Sphinx. Refer to documentation
 # for a list of supported languages.
diff --git a/ReleaseNotes.md b/ReleaseNotes.md
index 41d7130e2..4f307898b 100644
--- a/ReleaseNotes.md
+++ b/ReleaseNotes.md
@@ -1,3 +1,15 @@
+# Release_2019.09.1
+(Changes relative to Release_2019.03.1)
+
+## Highlights:
+
+## Acknowledgements:
+
+## Bug Fixes:
+
+## New Features and Enhancements:
+
+
 # Release_2019.03.1
 (Changes relative to Release_2018.09.1)