diff --git a/CHANGELOG.md b/CHANGELOG.md
index 26d549769..2fd548eb5 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,13 @@
 
 [1]: https://www.npmjs.com/package/@google-cloud/datastore?activeTab=versions
 
+### [5.0.6](https://www.github.com/googleapis/nodejs-datastore/compare/v5.0.5...v5.0.6) (2020-02-20)
+
+
+### Bug Fixes
+
+* **deps:** update dependency sinon to v9 ([#592](https://www.github.com/googleapis/nodejs-datastore/issues/592)) ([58c2b3f](https://www.github.com/googleapis/nodejs-datastore/commit/58c2b3fd97b1bab6bd6f03de0d7cdfba622bb6cb))
+
 ### [5.0.5](https://www.github.com/googleapis/nodejs-datastore/compare/v5.0.4...v5.0.5) (2020-02-12)
 
 
diff --git a/package.json b/package.json
index 8bac8fb47..04f025e57 100644
--- a/package.json
+++ b/package.json
@@ -1,7 +1,7 @@
 {
   "name": "@google-cloud/datastore",
   "description": "Cloud Datastore Client Library for Node.js",
-  "version": "5.0.5",
+  "version": "5.0.6",
   "license": "Apache-2.0",
   "author": "Google LLC.",
   "engines": {
diff --git a/samples/package.json b/samples/package.json
index 34fb72f87..97d8c67d3 100644
--- a/samples/package.json
+++ b/samples/package.json
@@ -14,7 +14,7 @@
     "test": "mocha --timeout=600000"
   },
   "dependencies": {
-    "@google-cloud/datastore": "^5.0.5",
+    "@google-cloud/datastore": "^5.0.6",
     "sinon": "^9.0.0"
   },
   "devDependencies": {