diff --git a/.gitattributes b/.gitattributes
index 5013f425..1e90448c 100644
--- a/.gitattributes
+++ b/.gitattributes
@@ -11,6 +11,5 @@
 /.travis.yml export-ignore
 /.gitignore export-ignore
 /.gitattributes export-ignore
-/lexer/ export-ignore
 /utilities/ export-ignore
 /error_reporting.ini export-ignore
diff --git a/composer.json b/composer.json
index 28c392c9..889cb944 100644
--- a/composer.json
+++ b/composer.json
@@ -40,6 +40,7 @@
         }
     },
     "require-dev": {
-        "phpunit/phpunit": "6.4.1"
+        "phpunit/phpunit": "6.4.1",
+        "smarty/smarty-lexer": "^3.1"
     }
 }