diff --git a/dist/index.js b/dist/index.js
index 97cf487..a231d2b 100644
--- a/dist/index.js
+++ b/dist/index.js
@@ -94225,6 +94225,9 @@ class GemfileLock extends default_1.DefaultUpdater {
      * @returns {string} The updated content
      */
     updateContent(content) {
+        if (!this.gemName) {
+            return content;
+        }
         // Bundler will convert 1.0.0-alpha1 to 1.0.0.pre.alpha1, so we need to
         // do the same here.
         const versionString = (0, common_1.resolveRubyGemfileLockVersion)(this.version.toString());
@@ -120948,7 +120951,7 @@ module.exports = {};
 /***/ ((module) => {
 
 "use strict";
-module.exports = {"i8":"15.1.1"};
+module.exports = {"i8":"15.1.2"};
 
 /***/ }),