diff --git a/CHANGELOG.md b/CHANGELOG.md
index 98a0e0fb..dd97b2c1 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,16 @@
 # Changelog
 
+## v1.20.0 (2023-08-07)
+
+### Features
+
+ * Create OpenQASMSimulator class
+ * symbolic built-in functions and constants
+
+### Documentation Changes
+
+ * License header in all code files
+
 ## v1.19.1 (2023-08-03)
 
 ### Bug Fixes and Other Changes
diff --git a/src/braket/default_simulator/_version.py b/src/braket/default_simulator/_version.py
index 039749b9..72f0d1d4 100644
--- a/src/braket/default_simulator/_version.py
+++ b/src/braket/default_simulator/_version.py
@@ -15,4 +15,4 @@
    Version number (major.minor.patch[-label])
 """
 
-__version__ = "1.19.2.dev0"
+__version__ = "1.20.0"