diff --git a/RELEASE.md b/RELEASE.md
index cd66e8b..8ba0029 100644
--- a/RELEASE.md
+++ b/RELEASE.md
@@ -10,6 +10,24 @@
 
 ## Deprecations
 
+# Version 1.17.3
+
+## Major Features and Improvements
+
+*   N/A
+
+## Bug Fixes and Other Changes
+
+*   Depends on `protobuf>=4.21.6,<6.32` for 3.9 and 3.10
+
+## Breaking Changes
+
+*   N/A
+
+## Deprecations
+
+*   N/A
+
 # Version 1.17.2
 
 ## Major Features and Improvements
diff --git a/setup.py b/setup.py
index 3c3bf72..f990f4e 100644
--- a/setup.py
+++ b/setup.py
@@ -136,7 +136,7 @@ def run(self):
         "absl-py>=0.9,<3.0.0",
         'googleapis-common-protos>=1.56.4,<2;python_version>="3.11"',
         'protobuf>=4.25.2;python_version>="3.11"',
-        'protobuf>=4.21.6,<4.22;python_version<"3.11"',
+        'protobuf>=4.21.6,<=6.32;python_version<"3.11"',
     ],
     python_requires=">=3.9,<4",
     packages=find_packages(),