update versions for 0.18.0-rc1
diff --git a/proton-c/bindings/python/docs/conf.py b/proton-c/bindings/python/docs/conf.py
index 50966e0..201e5d1 100644
--- a/proton-c/bindings/python/docs/conf.py
+++ b/proton-c/bindings/python/docs/conf.py
@@ -50,7 +50,7 @@
# The short X.Y version.
version = '0.18.0'
# The full version, including alpha/beta/rc tags.
-release = '0.18.0-SNAPSHOT'
+release = '0.18.0'
# The language for content autogenerated by Sphinx. Refer to documentation
# for a list of supported languages.
diff --git a/version.txt b/version.txt
index 4e57392..6633391 100644
--- a/version.txt
+++ b/version.txt
@@ -1 +1 @@
-0.18.0-SNAPSHOT
+0.18.0
