diff --git a/.github/workflows/create-release.yml b/.github/workflows/create-release.yml
index eef7915a..d6408be3 100644
--- a/.github/workflows/create-release.yml
+++ b/.github/workflows/create-release.yml
@@ -21,7 +21,7 @@ jobs:
         with:
           token: ${{ secrets.GITHUB_TOKEN }}
           config-file: .github/.release-please-config.json
-          manifest-file: src/version.json
+          manifest-file: resources/version.json
           target-branch: master
 
 ...
diff --git a/src/version.json b/resources/version.json
similarity index 100%
rename from src/version.json
rename to resources/version.json
diff --git a/src/Info.php b/src/Info.php
index ee97a046..2decc2ab 100644
--- a/src/Info.php
+++ b/src/Info.php
@@ -28,21 +28,31 @@ class Info
     public const TRAP_ROOT = __DIR__ . '/..';
     private const VERSION = 'experimental';
 
+    /**
+     * Returns the version of the Trap.
+     *
+     * @return non-empty-string
+     */
     public static function version(): string
     {
-        $versionPath = self::TRAP_ROOT . '/src/version.json';
-        $versionContents = file_get_contents($versionPath);
+        /** @var non-empty-string|null $cache */
+        static $cache = null;
 
-        if ($versionContents === false) {
-            return self::VERSION;
+        if ($cache !== null) {
+            return $cache;
         }
 
-        $versionData = json_decode($versionContents, true);
+        $fileContent = \file_get_contents(self::TRAP_ROOT . '/resources/version.json');
 
-        if (!is_array($versionData) || !isset($versionData['.']) || !is_string($versionData['.'])) {
-            return self::VERSION;
+        if ($fileContent === false) {
+            return $cache = self::VERSION;
         }
 
-        return $versionData['.'];
+        /** @var mixed $version */
+        $version = \json_decode($fileContent, true)['.'] ?? null;
+
+        return $cache = \is_string($version) && $version !== ''
+            ? $version
+            : self::VERSION;
     }
 }
diff --git a/tests/Unit/InfoTest.php b/tests/Unit/InfoTest.php
new file mode 100644
index 00000000..ce1678db
--- /dev/null
+++ b/tests/Unit/InfoTest.php
@@ -0,0 +1,15 @@
+<?php
+
+declare(strict_types=1);
+
+use Buggregator\Trap\Info;
+use PHPUnit\Framework\TestCase;
+
+final class InfoTest extends TestCase
+{
+    public function testVersionIsVersion(): void
+    {
+        self::assertMatchesRegularExpression('/^\d+\.\d+\.\d+/', $v1 = Info::version());
+        self::assertSame($v1, Info::version());
+    }
+}