diff --git a/CHANGELOG.md b/CHANGELOG.md
index 6a0c9ebc6..ed9774c00 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,14 @@
 
 [1]: https://www.npmjs.com/package/@google-cloud/datastore?activeTab=versions
 
+### [5.0.2](https://www.github.com/googleapis/nodejs-datastore/compare/v5.0.1...v5.0.2) (2019-12-12)
+
+
+### Bug Fixes
+
+* update datastore_transactional_single_entity_group_read_only to consistently use transaction ([#551](https://www.github.com/googleapis/nodejs-datastore/issues/551)) ([fbff2e7](https://www.github.com/googleapis/nodejs-datastore/commit/fbff2e7d2f054b157cc669c979a9e5acb09dd7a1))
+* **deps:** update dependency @grpc/grpc-js to v0.6.14 ([#552](https://www.github.com/googleapis/nodejs-datastore/issues/552)) ([f4df89c](https://www.github.com/googleapis/nodejs-datastore/commit/f4df89c50059541c75a7576c7264e3b7818871ea))
+
 ### [5.0.1](https://www.github.com/googleapis/nodejs-datastore/compare/v5.0.0...v5.0.1) (2019-12-05)
 
 
diff --git a/package.json b/package.json
index d877cb0d7..80dbdce38 100644
--- a/package.json
+++ b/package.json
@@ -1,7 +1,7 @@
 {
   "name": "@google-cloud/datastore",
   "description": "Cloud Datastore Client Library for Node.js",
-  "version": "5.0.1",
+  "version": "5.0.2",
   "license": "Apache-2.0",
   "author": "Google LLC.",
   "engines": {
@@ -48,7 +48,7 @@
   "dependencies": {
     "@google-cloud/projectify": "^1.0.0",
     "@google-cloud/promisify": "^1.0.0",
-    "@grpc/grpc-js": "0.6.13",
+    "@grpc/grpc-js": "0.6.14",
     "@types/duplexify": "^3.6.0",
     "@types/long": "^4.0.0",
     "arrify": "^2.0.1",
diff --git a/samples/concepts.js b/samples/concepts.js
index 0a1147de0..099d620bc 100644
--- a/samples/concepts.js
+++ b/samples/concepts.js
@@ -1143,13 +1143,13 @@ class Transaction extends TestHelper {
         const taskListKey = datastore.key(['TaskList', 'default']);
 
         await transaction.run();
-        const [taskList] = await datastore.get(taskListKey);
+        const [taskList] = await transaction.get(taskListKey);
         const query = datastore.createQuery('Task').hasAncestor(taskListKey);
-        const [taskListEntities] = await datastore.runQuery(query);
+        const [taskListEntities] = await transaction.runQuery(query);
         await transaction.commit();
         return [taskList, taskListEntities];
       } catch (err) {
-        transaction.rollback();
+        await transaction.rollback();
       }
     }
     // [END datastore_transactional_single_entity_group_read_only]
diff --git a/samples/package.json b/samples/package.json
index b637546af..571e75f15 100644
--- a/samples/package.json
+++ b/samples/package.json
@@ -14,7 +14,7 @@
     "test": "mocha --timeout=600000"
   },
   "dependencies": {
-    "@google-cloud/datastore": "^5.0.1",
+    "@google-cloud/datastore": "^5.0.2",
     "sinon": "^7.3.2"
   },
   "devDependencies": {