diff --git a/backend/apps/rag/main.py b/backend/apps/rag/main.py
index 1803ff8d4..78e43d9e7 100644
--- a/backend/apps/rag/main.py
+++ b/backend/apps/rag/main.py
@@ -95,8 +95,8 @@ from config import (
     TIKA_SERVER_URL,
     RAG_TOP_K,
     RAG_RELEVANCE_THRESHOLD,
-    RAG_MAX_FILE_SIZE,
-    RAG_MAX_FILE_COUNT,
+    RAG_FILE_MAX_SIZE,
+    RAG_FILE_MAX_COUNT,
     RAG_EMBEDDING_ENGINE,
     RAG_EMBEDDING_MODEL,
     RAG_EMBEDDING_MODEL_AUTO_UPDATE,
@@ -145,8 +145,8 @@ app.state.config = AppConfig()
 
 app.state.config.TOP_K = RAG_TOP_K
 app.state.config.RELEVANCE_THRESHOLD = RAG_RELEVANCE_THRESHOLD
-app.state.config.MAX_FILE_SIZE = RAG_MAX_FILE_SIZE
-app.state.config.MAX_FILE_COUNT = RAG_MAX_FILE_COUNT
+app.state.config.MAX_FILE_SIZE = RAG_FILE_MAX_SIZE
+app.state.config.MAX_FILE_COUNT = RAG_FILE_MAX_COUNT
 
 app.state.config.ENABLE_RAG_HYBRID_SEARCH = ENABLE_RAG_HYBRID_SEARCH
 app.state.config.ENABLE_RAG_WEB_LOADER_SSL_VERIFICATION = (
diff --git a/backend/config.py b/backend/config.py
index a4d5d4464..9cdcbe474 100644
--- a/backend/config.py
+++ b/backend/config.py
@@ -1005,16 +1005,24 @@ ENABLE_RAG_HYBRID_SEARCH = PersistentConfig(
     os.environ.get("ENABLE_RAG_HYBRID_SEARCH", "").lower() == "true",
 )
 
-RAG_MAX_FILE_COUNT = PersistentConfig(
-    "RAG_MAX_FILE_COUNT",
-    "rag.max_file_count",
-    int(os.environ.get("RAG_MAX_FILE_COUNT", "5")),
+RAG_FILE_MAX_COUNT = PersistentConfig(
+    "RAG_FILE_MAX_COUNT",
+    "rag.file.max_count",
+    (
+        int(os.environ.get("RAG_FILE_MAX_COUNT"))
+        if os.environ.get("RAG_FILE_MAX_COUNT")
+        else None
+    ),
 )
 
-RAG_MAX_FILE_SIZE = PersistentConfig(
-    "RAG_MAX_FILE_SIZE",
-    "rag.max_file_size",
-    int(os.environ.get("RAG_MAX_FILE_SIZE", "10")),
+RAG_FILE_MAX_SIZE = PersistentConfig(
+    "RAG_FILE_MAX_SIZE",
+    "rag.file.max_size",
+    (
+        int(os.environ.get("RAG_FILE_MAX_SIZE"))
+        if os.environ.get("RAG_FILE_MAX_SIZE")
+        else None
+    ),
 )
 
 ENABLE_RAG_WEB_LOADER_SSL_VERIFICATION = PersistentConfig(