diff --git a/_shake/Build.hs b/_shake/Build.hs
index 0e03759..eb897b4 100644
--- a/_shake/Build.hs
+++ b/_shake/Build.hs
@@ -11,7 +11,7 @@ fullTarget :: FilePath
 fullTarget = buildDir </> target <.> "pdf"
 
 pdflatexCmd :: [String]
-pdflatexCmd = ["xelatex", "-halt-on-error", "-output-directory=" ++ buildDir, target]
+pdflatexCmd = ["lualatex", "-halt-on-error", "-output-directory=" ++ buildDir, target]
 
 -- | Filters out the files which contain '#'.
 noEmacsFiles :: [FilePath] -> [FilePath]