diff --git a/CHANGELOG.md b/CHANGELOG.md
index 1d09e4b..e6fc00e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,9 @@ All notable changes to this project will be documented in this file.
 
 This project adheres to [Semantic Versioning](http://semver.org/).
 
+## 1.2.0
+* Allow setting `version: master` to get the latest build from the development branch.
+
 ## 1.1.0
 * Load the zig binaries from tool cache if available.
 * Use the ziglang.org download index instead of downloading from Github Releases.
diff --git a/dist/index.js b/dist/index.js
index 7b51475..f0574e0 100644
--- a/dist/index.js
+++ b/dist/index.js
@@ -1125,8 +1125,10 @@ async function downloadZig (version) {
 
   const index = await getJSON({ url: 'https://ziglang.org/download/index.json' })
 
-  const availableVersions = Object.keys(index).filter((v) => semver.valid(v))
-  const useVersion = semver.maxSatisfying(availableVersions, version)
+  const availableVersions = Object.keys(index)
+  const useVersion = semver.valid(version)
+    ? semver.maxSatisfying(availableVersions.filter((v) => semver.valid(v)), version)
+    : null
 
   const meta = index[useVersion || version]
   if (!meta || !meta[host]) {
@@ -1150,7 +1152,7 @@ async function downloadZig (version) {
 
 async function main () {
   const version = actions.getInput('version') || '0.5.0'
-  if (semver.lt(version, '0.3.0')) {
+  if (semver.valid(version) && semver.lt(version, '0.3.0')) {
     actions.setFailed('This action does not work with Zig 0.1.0 and Zig 0.2.0')
     return
   }
diff --git a/package.json b/package.json
index efc5261..63eee8e 100644
--- a/package.json
+++ b/package.json
@@ -1,7 +1,7 @@
 {
   "name": "setup-zig",
   "description": "Use the zig compiler in your Github Action",
-  "version": "1.1.0",
+  "version": "1.2.0",
   "author": "Renée Kooi <renee@kooi.me>",
   "bugs": {
     "url": "https://github.com/goto-bus-stop/setup-zig/issues"