diff --git a/app/application/resources/site/js/_choose-documentation-version.js b/app/application/resources/site/js/_choose-documentation-version.js
index ba5ac52..06f7933 100644
--- a/app/application/resources/site/js/_choose-documentation-version.js
+++ b/app/application/resources/site/js/_choose-documentation-version.js
@@ -1,8 +1,10 @@
 let blockDocumentationVersion = document.querySelector('#documentation-version');
-blockDocumentationVersion.querySelector('.documentation-version__button').addEventListener('click', (e) => {
-    if (blockDocumentationVersion.classList.contains('active')) {
-        blockDocumentationVersion.classList.remove('active');
-    } else {
-        blockDocumentationVersion.classList.add('active');
-    }
-});
+if (blockDocumentationVersion) {
+    blockDocumentationVersion.querySelector('.documentation-version__button').addEventListener('click', (e) => {
+        if (blockDocumentationVersion.classList.contains('active')) {
+            blockDocumentationVersion.classList.remove('active');
+        } else {
+            blockDocumentationVersion.classList.add('active');
+        }
+    });
+}