diff --git a/_plugins/posts-lastmod-hook.rb b/_plugins/posts-lastmod-hook.rb
index 1fd6ecf..1efa032 100644
--- a/_plugins/posts-lastmod-hook.rb
+++ b/_plugins/posts-lastmod-hook.rb
@@ -4,10 +4,10 @@
 
 Jekyll::Hooks.register :posts, :post_init do |post|
 
-  commit_num = `git rev-list --count HEAD "#{ post.path }"`
+  commit_num = `git rev-list --count HEAD "#{ post.path }"`.strip
 
   if commit_num.to_i > 1
-    lastmod_date = `git log -1 --pretty="%ad" --date=iso "#{ post.path }"`
+    lastmod_date = `git log -1 --pretty="%ad" --date=iso "#{ post.path }"`.strip
     post.data['last_modified_at'] = lastmod_date
   end