diff --git a/.devcontainer/Dockerfile b/.devcontainer/Dockerfile
index 9be5a40..b847dc5 100644
--- a/.devcontainer/Dockerfile
+++ b/.devcontainer/Dockerfile
@@ -1,7 +1,6 @@
-# See here for image contents: https://github.com/microsoft/vscode-dev-containers/tree/v0.191.0/containers/php/.devcontainer/base.Dockerfile
-
-# [Choice] PHP version: 8, 8.0, 7, 7.4, 7.3
-ARG VARIANT="7"
+# See here for image contents: https://github.com/microsoft/vscode-dev-containers/tree/v0.195.0/containers/php/.devcontainer/base.Dockerfile
+# [Choice] PHP version (use -bullseye variants on local arm64/Apple Silicon): 8, 8.0, 7, 7.4, 7.3, 8-bullseye, 8.0-bullseye, 7-bullseye, 7.4-bullseye, 7.3-bullseye, 8-buster, 8.0-buster, 7-buster, 7.4-buster, 7.3-buster
+ARG VARIANT=7-bullseye
 FROM mcr.microsoft.com/vscode/devcontainers/php:0-${VARIANT}
 
 # [Choice] Node.js version: none, lts/*, 16, 14, 12, 10
diff --git a/.devcontainer/devcontainer.json b/.devcontainer/devcontainer.json
index a148f23..9d91f9d 100644
--- a/.devcontainer/devcontainer.json
+++ b/.devcontainer/devcontainer.json
@@ -1,12 +1,14 @@
 // For format details, see https://aka.ms/devcontainer.json. For config options, see the README at:
-// https://github.com/microsoft/vscode-dev-containers/tree/v0.191.0/containers/php
+// https://github.com/microsoft/vscode-dev-containers/tree/v0.195.0/containers/php
 {
 	"name": "PHP",
 	"build": {
 		"dockerfile": "Dockerfile",
 		"args": { 
 			// Update VARIANT to pick a PHP version: 8, 8.0, 7, 7.4, 7.3
-			"VARIANT": "7",
+			// Append -bullseye or -buster to pin to an OS version.
+			// Use -bullseye variants on local on arm64/Apple Silicon.
+			"VARIANT": "7-bullseye",
 			"NODE_VERSION": "lts/*"
 		}
 	},