diff --git a/CHANGELOG.md b/CHANGELOG.md
index 03ee081e..bc3735b3 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,13 @@
 
 [1]: https://pypi.org/project/google-cloud-dlp/#history
 
+## [3.9.2](https://github.com/googleapis/python-dlp/compare/v3.9.1...v3.9.2) (2022-10-07)
+
+
+### Bug Fixes
+
+* **deps:** Allow protobuf 3.19.5 ([#451](https://github.com/googleapis/python-dlp/issues/451)) ([a1e1b92](https://github.com/googleapis/python-dlp/commit/a1e1b9278e47ecff3f6d92f21dfc55368c7d35e1))
+
 ## [3.9.1](https://github.com/googleapis/python-dlp/compare/v3.9.0...v3.9.1) (2022-10-04)
 
 
diff --git a/samples/snippets/requirements-test.txt b/samples/snippets/requirements-test.txt
index 58414477..ac0b37c5 100644
--- a/samples/snippets/requirements-test.txt
+++ b/samples/snippets/requirements-test.txt
@@ -1,4 +1,4 @@
-backoff==2.1.2
+backoff==2.2.1
 pytest==7.1.3
 flaky==3.7.0
 mock==4.0.3
diff --git a/samples/snippets/requirements.txt b/samples/snippets/requirements.txt
index da9bbcb9..8d6d589a 100644
--- a/samples/snippets/requirements.txt
+++ b/samples/snippets/requirements.txt
@@ -1,5 +1,5 @@
-google-cloud-dlp==3.9.0
+google-cloud-dlp==3.9.1
 google-cloud-storage==2.5.0
 google-cloud-pubsub==2.13.7
-google-cloud-datastore==2.8.1
+google-cloud-datastore==2.8.2
 google-cloud-bigquery==3.3.3
diff --git a/setup.py b/setup.py
index a1ba6df4..01c26bb3 100644
--- a/setup.py
+++ b/setup.py
@@ -21,12 +21,12 @@
 
 name = "google-cloud-dlp"
 description = "Cloud Data Loss Prevention (DLP) API API client library"
-version = "3.9.1"
+version = "3.9.2"
 release_status = "Development Status :: 5 - Production/Stable"
 dependencies = [
     "google-api-core[grpc] >= 1.32.0, <3.0.0dev,!=2.0.*,!=2.1.*,!=2.2.*,!=2.3.*,!=2.4.*,!=2.5.*,!=2.6.*,!=2.7.*",
     "proto-plus >= 1.22.0, <2.0.0dev",
-    "protobuf >= 3.20.2, <5.0.0dev",
+    "protobuf>=3.19.5,<5.0.0dev,!=3.20.0,!=3.20.1,!=4.21.0,!=4.21.1,!=4.21.2,!=4.21.3,!=4.21.4,!=4.21.5",
 ]
 
 extras = {"libcst": "libcst >= 0.2.5"}
diff --git a/testing/constraints-3.7.txt b/testing/constraints-3.7.txt
index 9c98bbf5..28b41909 100644
--- a/testing/constraints-3.7.txt
+++ b/testing/constraints-3.7.txt
@@ -8,4 +8,4 @@
 google-api-core==1.32.0
 proto-plus==1.22.0
 libcst==0.2.5
-protobuf==3.20.2
+protobuf==3.19.5