diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index da2177c62..02bd31d35 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -1,3 +1,3 @@
 {
-  ".": "2.20.0"
+  ".": "2.21.0"
 }
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 188af1327..0b642109f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,18 @@
 
 [1]: https://pypi.org/project/dialogflow/#history
 
+## [2.21.0](https://github.com/googleapis/python-dialogflow/compare/v2.20.0...v2.21.0) (2023-03-03)
+
+
+### Features
+
+* Added support for custom content types ([4e35741](https://github.com/googleapis/python-dialogflow/commit/4e35741d3ffb11b8dd1e5e2c77897fd2c2c4b9f2))
+
+
+### Documentation
+
+* Clarified wording around quota usage ([4e35741](https://github.com/googleapis/python-dialogflow/commit/4e35741d3ffb11b8dd1e5e2c77897fd2c2c4b9f2))
+
 ## [2.20.0](https://github.com/googleapis/python-dialogflow/compare/v2.19.1...v2.20.0) (2023-02-28)
 
 
diff --git a/google/cloud/dialogflow/gapic_version.py b/google/cloud/dialogflow/gapic_version.py
index 551f0d2eb..e546bae05 100644
--- a/google/cloud/dialogflow/gapic_version.py
+++ b/google/cloud/dialogflow/gapic_version.py
@@ -13,4 +13,4 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 #
-__version__ = "2.20.0"  # {x-release-please-version}
+__version__ = "2.21.0"  # {x-release-please-version}
diff --git a/google/cloud/dialogflow_v2/gapic_version.py b/google/cloud/dialogflow_v2/gapic_version.py
index 551f0d2eb..e546bae05 100644
--- a/google/cloud/dialogflow_v2/gapic_version.py
+++ b/google/cloud/dialogflow_v2/gapic_version.py
@@ -13,4 +13,4 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 #
-__version__ = "2.20.0"  # {x-release-please-version}
+__version__ = "2.21.0"  # {x-release-please-version}
diff --git a/google/cloud/dialogflow_v2beta1/gapic_version.py b/google/cloud/dialogflow_v2beta1/gapic_version.py
index 551f0d2eb..e546bae05 100644
--- a/google/cloud/dialogflow_v2beta1/gapic_version.py
+++ b/google/cloud/dialogflow_v2beta1/gapic_version.py
@@ -13,4 +13,4 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 #
-__version__ = "2.20.0"  # {x-release-please-version}
+__version__ = "2.21.0"  # {x-release-please-version}
diff --git a/samples/generated_samples/snippet_metadata_google.cloud.dialogflow.v2.json b/samples/generated_samples/snippet_metadata_google.cloud.dialogflow.v2.json
index d2844dc00..1c7632304 100644
--- a/samples/generated_samples/snippet_metadata_google.cloud.dialogflow.v2.json
+++ b/samples/generated_samples/snippet_metadata_google.cloud.dialogflow.v2.json
@@ -8,7 +8,7 @@
     ],
     "language": "PYTHON",
     "name": "google-cloud-dialogflow",
-    "version": "0.1.0"
+    "version": "2.21.0"
   },
   "snippets": [
     {
diff --git a/samples/generated_samples/snippet_metadata_google.cloud.dialogflow.v2beta1.json b/samples/generated_samples/snippet_metadata_google.cloud.dialogflow.v2beta1.json
index 9860e03a7..c3eb5577d 100644
--- a/samples/generated_samples/snippet_metadata_google.cloud.dialogflow.v2beta1.json
+++ b/samples/generated_samples/snippet_metadata_google.cloud.dialogflow.v2beta1.json
@@ -8,7 +8,7 @@
     ],
     "language": "PYTHON",
     "name": "google-cloud-dialogflow",
-    "version": "0.1.0"
+    "version": "2.21.0"
   },
   "snippets": [
     {