diff --git a/backend/internal/indexstorage/api.go b/backend/internal/indexstorage/api.go
index a5dddb1a..ebd1e7e5 100644
--- a/backend/internal/indexstorage/api.go
+++ b/backend/internal/indexstorage/api.go
@@ -10,7 +10,7 @@ type Path string
 
 const MaxPathLength = 255
 
-var pathPartRe = regexp.MustCompile("^[a-zA-Z0-9_.-]+(/[a-zA-Z0-9_.-]+)*$")
+var pathPartRe = regexp.MustCompile("^[a-zA-Z0-9_.@-]+(/[a-zA-Z0-9_.@-]+)*$")
 
 func (p Path) Validate() error {
 	if len(p) > MaxPathLength {
diff --git a/backend/internal/providerindex/providertypes/doc_item_name.go b/backend/internal/providerindex/providertypes/doc_item_name.go
index 5b720123..644e90b4 100644
--- a/backend/internal/providerindex/providertypes/doc_item_name.go
+++ b/backend/internal/providerindex/providertypes/doc_item_name.go
@@ -10,7 +10,7 @@ type DocItemName string
 
 const docItemNameMaxLength = 255
 
-var docItemNameRe = regexp.MustCompile("^[a-zA-Z0-9 ._-]+$")
+var docItemNameRe = regexp.MustCompile("^[a-zA-Z0-9 ._@-]+$")
 
 func (n DocItemName) Validate() error {
 	if len(n) > docItemNameMaxLength || !docItemNameRe.MatchString(string(n)) {