diff --git a/config/_default/security.toml b/config/_default/security.toml
index 73af66164..2be3f1ba8 100644
--- a/config/_default/security.toml
+++ b/config/_default/security.toml
@@ -6,8 +6,8 @@
     osEnv = ['^PATH$']
 
   [funcs]
-    getenv = ['^HUGO_', '^REPOSITORY_URL$']
+    getenv = ['^HUGO_', '^REPOSITORY_URL$', '^BRANCH$']
 
   [http]
     methods = ['(?i)GET|POST']
-    urls = ['.*']
\ No newline at end of file
+    urls = ['.*']