diff --git a/remark-modified-time.mjs b/remark-modified-time.mjs
index b0793c7..7291612 100644
--- a/remark-modified-time.mjs
+++ b/remark-modified-time.mjs
@@ -3,7 +3,7 @@ import { execSync } from "node:child_process";
 export function remarkModifiedTime() {
   return (tree, file) => {
     const filepath = file.history[0];
-    const result = execSync(`git log -1 --pretty="format:%cI" "${filepath}"`);
+    const result = import.meta.env.PUBLIC_COMMIT === "" ? "Unavailable" : execSync(`git log -1 --pretty="format:%cI" "${filepath}"`);
     file.data.astro.frontmatter.lastModified = result.toString();
   };
 }
\ No newline at end of file
diff --git a/src/pages/posts/[...slug].astro b/src/pages/posts/[...slug].astro
index c38489f..6ae3b95 100644
--- a/src/pages/posts/[...slug].astro
+++ b/src/pages/posts/[...slug].astro
@@ -18,7 +18,7 @@ export async function getStaticPaths() {
 const { post } = Astro.props;
 const { Content, remarkPluginFrontmatter } = await render(post);
 
-const lastModified = import.meta.env.PUBLIC_COMMIT === "" ? "Unavailable" : dayjs(remarkPluginFrontmatter.lastModified)
+const lastModified = dayjs(remarkPluginFrontmatter.lastModified)
   .utc()
   .format("HH:mm:ss DD MMMM YYYY UTC");
 ---