diff --git a/CHANGELOG.md b/CHANGELOG.md
index ab0677f..e16a187 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,10 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## Unreleased
+### Updated
+- pytest version 4.0.0
+
 ## [0.8.1] - 2018-11-14
 ### Changed
 - README.md to recommend using vanilla Python virtual environments and pip instead of pipenv
diff --git a/Pipfile.lock b/Pipfile.lock
index 84347d1..2afcf54 100644
--- a/Pipfile.lock
+++ b/Pipfile.lock
@@ -235,11 +235,11 @@
         },
         "pytest": {
             "hashes": [
-                "sha256:3f193df1cfe1d1609d4c583838bea3d532b18d6160fd3f55c9447fdca30848ec",
-                "sha256:e246cf173c01169b9617fc07264b7b1316e78d7a650055235d6d897bc80d9660"
+                "sha256:488c842647bbeb350029da10325cb40af0a9c7a2fdda45aeb1dda75b60048ffb",
+                "sha256:c055690dfefa744992f563e8c3a654089a6aa5b8092dded9b6fafbd70b2e45a7"
             ],
             "index": "pypi",
-            "version": "==3.10.1"
+            "version": "==4.0.0"
         },
         "six": {
             "hashes": [