diff --git a/quartz/plugins/transformers/lastmod.ts b/quartz/plugins/transformers/lastmod.ts
index fe8c01b..94c74c5 100644
--- a/quartz/plugins/transformers/lastmod.ts
+++ b/quartz/plugins/transformers/lastmod.ts
@@ -9,7 +9,7 @@ export interface Options {
 }
 
 const defaultOptions: Options = {
-  priority: ["frontmatter", "git", "filesystem"],
+  priority: ["frontmatter", "git"],
 }
 
 function coerceDate(fp: string, d: any): Date {