diff --git a/backend/Doxyfile b/backend/Doxyfile
index a0cf46c4..dbb13e3b 100644
--- a/backend/Doxyfile
+++ b/backend/Doxyfile
@@ -943,7 +943,7 @@ WARN_LOGFILE           =
 # spaces. See also FILE_PATTERNS and EXTENSION_MAPPING
 # Note: If this tag is empty the current directory is searched.
 
-INPUT                  =
+INPUT                  = "src"
 
 # This tag can be used to specify the character encoding of the source files
 # that doxygen parses. Internally doxygen uses the UTF-8 encoding. Doxygen uses