diff --git a/action.yml b/action.yml
index 4aea4f0..c700265 100644
--- a/action.yml
+++ b/action.yml
@@ -9,7 +9,6 @@ inputs:
   version:
     description: 'Version of bwenv to set up. Default is latest.'
     required: false
-    default: 'latest'
 
 outputs:
   path:
diff --git a/dist/main.cjs b/dist/main.cjs
index 64a6bd5..1d6d23a 100644
--- a/dist/main.cjs
+++ b/dist/main.cjs
@@ -22401,11 +22401,14 @@ async function unzipArchive(archive, destination = __dirname2, deleteAfter = fal
 }
 async function run() {
   try {
-    const inputVersion = core.getInput("version", { required: false });
-    const configVersion = await getVersionFromConfigFile();
-    const availableVersions = await getAvailableVersions();
-    const matchingVersion = findLatestMatchingVersion(availableVersions, configVersion);
-    const version2 = inputVersion || matchingVersion || "latest";
+    const version2 = core.getInput("version", { required: false }) || await (async () => {
+      const configVersion = await getVersionFromConfigFile();
+      const availableVersions = await getAvailableVersions();
+      const matchingVersion = findLatestMatchingVersion(availableVersions, configVersion);
+      if (!matchingVersion)
+        throw new Error(`No version matching ${configVersion} found.`);
+      return matchingVersion;
+    })();
     core.info(`Using Version: ${version2}`);
     const releaseURL = await getReleaseURL(version2);
     await downloadFile(releaseURL, path.join(__dirname2, "bwenv.zip")).then(
diff --git a/src/main.ts b/src/main.ts
index a26429f..108ff14 100644
--- a/src/main.ts
+++ b/src/main.ts
@@ -183,14 +183,15 @@ async function unzipArchive(
 
 async function run() {
   try {
-    const inputVersion = core.getInput('version', { required: false });
-
-    const configVersion = await getVersionFromConfigFile();
-    const availableVersions = await getAvailableVersions();
-    const matchingVersion = findLatestMatchingVersion(availableVersions, configVersion);
-
-    const version = inputVersion || matchingVersion || 'latest';
-
+    const version =
+      core.getInput('version', { required: false }) ||
+      (await (async () => {
+        const configVersion = await getVersionFromConfigFile();
+        const availableVersions = await getAvailableVersions();
+        const matchingVersion = findLatestMatchingVersion(availableVersions, configVersion);
+        if (!matchingVersion) throw new Error(`No version matching ${configVersion} found.`);
+        return matchingVersion;
+      })());
     core.info(`Using Version: ${version}`);
 
     const releaseURL = await getReleaseURL(version);