diff --git a/packages/google-cloud-dialogflow-cx/.release-please-manifest.json b/packages/google-cloud-dialogflow-cx/.release-please-manifest.json
index d0d087a3f108..6d9e5fc04aff 100644
--- a/packages/google-cloud-dialogflow-cx/.release-please-manifest.json
+++ b/packages/google-cloud-dialogflow-cx/.release-please-manifest.json
@@ -1,3 +1,3 @@
 {
-  ".": "1.19.0"
+  ".": "1.20.0"
 }
diff --git a/packages/google-cloud-dialogflow-cx/CHANGELOG.md b/packages/google-cloud-dialogflow-cx/CHANGELOG.md
index 36b1deb06fe4..71718f6cfd4c 100644
--- a/packages/google-cloud-dialogflow-cx/CHANGELOG.md
+++ b/packages/google-cloud-dialogflow-cx/CHANGELOG.md
@@ -1,5 +1,12 @@
 # Changelog
 
+## [1.20.0](https://github.com/googleapis/python-dialogflow-cx/compare/v1.19.0...v1.20.0) (2023-03-01)
+
+
+### Features
+
+* Added persist_parameter_changes field from `query_params` to MatchIntentRequest ([#506](https://github.com/googleapis/python-dialogflow-cx/issues/506)) ([27f6020](https://github.com/googleapis/python-dialogflow-cx/commit/27f60205a3068df1a1576f120c97d45bb3501b2a))
+
 ## [1.19.0](https://github.com/googleapis/python-dialogflow-cx/compare/v1.18.0...v1.19.0) (2023-02-28)
 
 
diff --git a/packages/google-cloud-dialogflow-cx/google/cloud/dialogflowcx/gapic_version.py b/packages/google-cloud-dialogflow-cx/google/cloud/dialogflowcx/gapic_version.py
index 86f8ab820b43..4d61ace4f182 100644
--- a/packages/google-cloud-dialogflow-cx/google/cloud/dialogflowcx/gapic_version.py
+++ b/packages/google-cloud-dialogflow-cx/google/cloud/dialogflowcx/gapic_version.py
@@ -13,4 +13,4 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 #
-__version__ = "1.19.0"  # {x-release-please-version}
+__version__ = "1.20.0"  # {x-release-please-version}
diff --git a/packages/google-cloud-dialogflow-cx/google/cloud/dialogflowcx_v3/gapic_version.py b/packages/google-cloud-dialogflow-cx/google/cloud/dialogflowcx_v3/gapic_version.py
index 86f8ab820b43..4d61ace4f182 100644
--- a/packages/google-cloud-dialogflow-cx/google/cloud/dialogflowcx_v3/gapic_version.py
+++ b/packages/google-cloud-dialogflow-cx/google/cloud/dialogflowcx_v3/gapic_version.py
@@ -13,4 +13,4 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 #
-__version__ = "1.19.0"  # {x-release-please-version}
+__version__ = "1.20.0"  # {x-release-please-version}
diff --git a/packages/google-cloud-dialogflow-cx/google/cloud/dialogflowcx_v3beta1/gapic_version.py b/packages/google-cloud-dialogflow-cx/google/cloud/dialogflowcx_v3beta1/gapic_version.py
index 86f8ab820b43..4d61ace4f182 100644
--- a/packages/google-cloud-dialogflow-cx/google/cloud/dialogflowcx_v3beta1/gapic_version.py
+++ b/packages/google-cloud-dialogflow-cx/google/cloud/dialogflowcx_v3beta1/gapic_version.py
@@ -13,4 +13,4 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 #
-__version__ = "1.19.0"  # {x-release-please-version}
+__version__ = "1.20.0"  # {x-release-please-version}
diff --git a/packages/google-cloud-dialogflow-cx/samples/generated_samples/snippet_metadata_google.cloud.dialogflow.cx.v3.json b/packages/google-cloud-dialogflow-cx/samples/generated_samples/snippet_metadata_google.cloud.dialogflow.cx.v3.json
index 4fe8e9ba4fd5..23a8c2b162de 100644
--- a/packages/google-cloud-dialogflow-cx/samples/generated_samples/snippet_metadata_google.cloud.dialogflow.cx.v3.json
+++ b/packages/google-cloud-dialogflow-cx/samples/generated_samples/snippet_metadata_google.cloud.dialogflow.cx.v3.json
@@ -8,7 +8,7 @@
     ],
     "language": "PYTHON",
     "name": "google-cloud-dialogflow-cx",
-    "version": "0.1.0"
+    "version": "1.20.0"
   },
   "snippets": [
     {
diff --git a/packages/google-cloud-dialogflow-cx/samples/generated_samples/snippet_metadata_google.cloud.dialogflow.cx.v3beta1.json b/packages/google-cloud-dialogflow-cx/samples/generated_samples/snippet_metadata_google.cloud.dialogflow.cx.v3beta1.json
index bddeff213e5a..a5689da347b3 100644
--- a/packages/google-cloud-dialogflow-cx/samples/generated_samples/snippet_metadata_google.cloud.dialogflow.cx.v3beta1.json
+++ b/packages/google-cloud-dialogflow-cx/samples/generated_samples/snippet_metadata_google.cloud.dialogflow.cx.v3beta1.json
@@ -8,7 +8,7 @@
     ],
     "language": "PYTHON",
     "name": "google-cloud-dialogflow-cx",
-    "version": "0.1.0"
+    "version": "1.20.0"
   },
   "snippets": [
     {