diff --git a/modules/Installer/Config/config.php b/modules/Installer/Config/config.php
index 84c8c16d..4331ab40 100644
--- a/modules/Installer/Config/config.php
+++ b/modules/Installer/Config/config.php
@@ -12,6 +12,7 @@ return [
         'tokenizer',
         'json',
         'curl',
+        'gmp',
     ],
 
     # Make sure these are writable