diff --git a/.periods--0.05.sql.swp b/.periods--0.05.sql.swp
new file mode 100644
index 0000000..d43cc07
Binary files /dev/null and b/.periods--0.05.sql.swp differ
diff --git a/CHANGELOG.md b/CHANGELOG.md
new file mode 100644
index 0000000..acad496
--- /dev/null
+++ b/CHANGELOG.md
@@ -0,0 +1,17 @@
+# Changelog
+
+All notable changes to this project will be documented in this file.
+
+The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
+
+## [Unreleased]
+
+## [1.0] – 2019-08-25
+
+### Added
+
+  - Initial release. Supports all features of the SQL Standard
+    concerning periods and `SYSTEM VERSIONING`.
+
+[Unreleased]: https://github.com/xocolatl/periods/compare/v1.0...HEAD
+[1.0]: https://github.com/xocolatl/periods/releases/tag/v1.0
diff --git a/Makefile b/Makefile
index 8482c3c..74f4068 100644
--- a/Makefile
+++ b/Makefile
@@ -1,6 +1,6 @@
 MODULES = periods
 EXTENSION = periods
-DATA = periods--0.05.sql
+DATA = periods--1.0.sql
 DOCS = README.periods
 
 REGRESS = install \
diff --git a/periods--0.05.sql b/periods--1.0.sql
similarity index 100%
rename from periods--0.05.sql
rename to periods--1.0.sql
diff --git a/periods.control b/periods.control
index 48bc499..91807de 100644
--- a/periods.control
+++ b/periods.control
@@ -1,5 +1,5 @@
 comment = 'Provide Standard SQL functionality for PERIODs and SYSTEM VERSIONING'
-default_version = 0.05
+default_version = 1.0
 module_pathname = '$libdir/periods'
 relocatable = false
 requires = 'btree_gist'