diff --git a/CHANGELOG.md b/CHANGELOG.md
index fd89dbccf..4ab49bd8b 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,15 @@
 # Changelog
 
+## 4.9.0-rc.1 (2024-04-10)
+
+### Features
+
+#### Publish pyquil-grpc-web; A new package that supports making gRPC connections over HTTP/1.1. (#1763)
+
+### Fixes
+
+#### Program#out(calibrations=False) will not expand calibrations (#1758)
+
 ## 4.9.0-rc.0 (2024-04-09)
 
 ### Features
diff --git a/pyproject.toml b/pyproject.toml
index b823ad53f..ffe192870 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "pyquil"
-version = "4.9.0-rc.0"
+version = "4.9.0-rc.1"
 description = "A Python library for creating Quantum Instruction Language (Quil) programs."
 authors = ["Rigetti Computing <softapps@rigetti.com>"]
 readme = "README.md"