diff --git a/RELEASE_NOTES.md b/RELEASE_NOTES.md
index 1a0e968..f04e39b 100644
--- a/RELEASE_NOTES.md
+++ b/RELEASE_NOTES.md
@@ -1,5 +1,9 @@
 # Frequenz Client Base Library Release Notes
 
+## Upgrading
+
+* Updated `protobuf` dependency range: changed from `>=4.21.6, <6` to `>=5.29.2, <7`
+
 ## New Features
 
 * Add the `warn_on_overflow` option to the streaming receivers to allow ignoring overflow warnings
diff --git a/pyproject.toml b/pyproject.toml
index 1802112..85fb767 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -28,7 +28,7 @@ requires-python = ">= 3.11, < 4"
 dependencies = [
   "frequenz-channels >= 1.6.1, < 2",
   "grpcio >= 1.54.2, < 2",
-  "protobuf >= 4.21.6, < 6",
+  "protobuf >= 5.29.2, < 7",
   "typing-extensions >= 4.5.0, < 5",
 ]
 dynamic = ["version"]