diff --git a/RELEASE_NOTES.md b/RELEASE_NOTES.md
index 80e5f0cb..92913cf8 100644
--- a/RELEASE_NOTES.md
+++ b/RELEASE_NOTES.md
@@ -1,17 +1,5 @@
 # Frequenz Microgrid API Client Release Notes
 
-## Summary
-
-<!-- Here goes a general summary of what this release is about -->
-
 ## Upgrading
 
-<!-- Here goes notes on how to upgrade from previous versions, including deprecations and what they should be replaced with -->
-
-## New Features
-
-<!-- Here goes the main new features and examples or instructions on how to use them -->
-
-## Bug Fixes
-
-<!-- Here goes notable bug fixes that are worth a special mention or explanation -->
+- Widen `frequenz-client-base` dependency to allow `v0.9.0`.
diff --git a/pyproject.toml b/pyproject.toml
index 61b6ecba..8cc3ad03 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -38,7 +38,7 @@ requires-python = ">= 3.11, < 4"
 dependencies = [
   "frequenz-api-microgrid >= 0.15.3, < 0.16.0",
   "frequenz-channels >= 1.0.0-rc1, < 2.0.0",
-  "frequenz-client-base >= 0.8.0, < 0.9",
+  "frequenz-client-base >= 0.8.0, < 0.10.0",
   "grpcio >= 1.54.2, < 2",
   "protobuf >= 4.21.6, < 6",
   "timezonefinder >= 6.2.0, < 7",