diff --git a/server/routers/knowledge_router.py b/server/routers/knowledge_router.py
index 94875517..97a3369c 100644
--- a/server/routers/knowledge_router.py
+++ b/server/routers/knowledge_router.py
@@ -25,7 +25,6 @@ knowledge = APIRouter(prefix="/knowledge", tags=["knowledge"])
 media_types = {
     ".pdf": "application/pdf",
     ".docx": "application/vnd.openxmlformats-officedocument.wordprocessingml.document",
-    ".doc": "application/msword",
     ".txt": "text/plain",
     ".md": "text/markdown",
     ".json": "application/json",
diff --git a/src/knowledge/indexing.py b/src/knowledge/indexing.py
index bbaafc1a..702eae8b 100644
--- a/src/knowledge/indexing.py
+++ b/src/knowledge/indexing.py
@@ -24,7 +24,6 @@ from src.utils import hashstr, logger
 SUPPORTED_FILE_EXTENSIONS: tuple[str, ...] = (
     ".txt",
     ".md",
-    ".doc",
     ".docx",
     ".html",
     ".htm",
diff --git a/web/src/components/FileUploadModal.vue b/web/src/components/FileUploadModal.vue
index 536b3cae..f60ffb80 100644
--- a/web/src/components/FileUploadModal.vue
+++ b/web/src/components/FileUploadModal.vue
@@ -186,7 +186,6 @@ const DEFAULT_SUPPORTED_TYPES = [
   '.jpeg',
   '.md',
   '.docx',
-  '.doc',
 ];
 
 const normalizeExtensions = (extensions) => {