diff --git a/src/gallery/source_links.py b/src/gallery/source_links.py
index eb85097..4a3d591 100644
--- a/src/gallery/source_links.py
+++ b/src/gallery/source_links.py
@@ -3,6 +3,7 @@ import os
 from importlib.resources import files
 
 REPOSITORY = "https://git.snw.su/snw/FletAppDemo"
+DEFAULT_REVISION = "e8830e846a40a6b4484b4c07d7ec752ca0faca87"
 
 
 def _manifest() -> dict[str, dict[str, str | int]]:
@@ -15,6 +16,5 @@ SOURCE_MANIFEST = _manifest()
 
 def source_url(example_id: str) -> str:
     anchor = SOURCE_MANIFEST[example_id]
-    revision = os.getenv("FLET_GALLERY_REVISION", "main")
+    revision = os.getenv("FLET_GALLERY_REVISION", DEFAULT_REVISION)
     return f"{REPOSITORY}/src/commit/{revision}/{anchor['path']}#L{anchor['line']}"
-