diff --git a/composer.json b/composer.json
index 4d11ac7..3c4658a 100644
--- a/composer.json
+++ b/composer.json
@@ -6,7 +6,7 @@
     "license": "BSD-3-Clause",
     "require":
     {
-        "silverstripe/admin": "^4"
+        "silverstripe/admin": "^1@dev"
     },
     "conflict": {
         "cwp/cwp-core": "*"
diff --git a/code/extensions/RichLinksExtension.php b/src/extensions/RichLinksExtension.php
similarity index 100%
rename from code/extensions/RichLinksExtension.php
rename to src/extensions/RichLinksExtension.php