diff --git a/.gitignore b/.gitignore
index a485625..e867f84 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1 +1,2 @@
 /_build
+/result
diff --git a/dune-project b/dune-project
index bd76daa..fc9d716 100644
--- a/dune-project
+++ b/dune-project
@@ -18,4 +18,5 @@
   (uri "https://git.lain.faith/haskal/xlog.git"))
  (depends ocaml dune
   (ptime (>= 1.1))
-  (ppxlib (>= 0.32))))
+  (ppxlib (>= 0.32))
+  (ppx_unicode (>= 0.0.1))))
diff --git a/lib/dune b/lib/dune
index 525f9ee..44173de 100644
--- a/lib/dune
+++ b/lib/dune
@@ -1,4 +1,5 @@
 (library
  (name xlog)
  (public_name xlog)
+ (preprocess (pps ppx_unicode))
  (libraries ptime ptime.clock.os str unix))
diff --git a/package.nix b/package.nix
index 6428170..f742b97 100644
--- a/package.nix
+++ b/package.nix
@@ -5,6 +5,7 @@
   buildDunePackage,
   ptime,
   ppxlib,
+  ppx_unicode,
 
   ocaml,
   dune_3,
@@ -29,10 +30,9 @@ in buildDunePackage rec {
   minimalOCamlVersion = "5.1";
   dontStrip = true;
 
-  buildInputs = [ ppxlib ];
-  propagatedBuildInputs = [ ptime ];
-
-  nativeBuildInputs = lib.optionals enableShell [
+  buildInputs = [ ppx_unicode ];
+  propagatedBuildInputs = [ ptime ppxlib ];
+  nativeBuildInputs = [ ppxlib ppx_unicode ] ++ lib.optionals enableShell [
     ocaml dune_3 odoc utop
   ];
 }
diff --git a/ppx/dune b/ppx/dune
index 10e3c07..bedd8e3 100644
--- a/ppx/dune
+++ b/ppx/dune
@@ -3,6 +3,6 @@
  (public_name xlog.ppx)
  (synopsis "ppx rewriters for xlog")
  (preprocess
-  (pps ppxlib.metaquot))
+  (pps ppx_unicode ppxlib.metaquot))
  (libraries ppxlib)
  (kind ppx_rewriter))
diff --git a/test/dune b/test/dune
index fd04fa1..fd93c17 100644
--- a/test/dune
+++ b/test/dune
@@ -1,4 +1,4 @@
 (test
  (name test_xlog)
- (preprocess (pps xlog.ppx))
+ (preprocess (pps ppx_unicode xlog.ppx))
  (libraries xlog))
diff --git a/xlog.opam b/xlog.opam
index 80a1e38..4f1471d 100644
--- a/xlog.opam
+++ b/xlog.opam
@@ -13,6 +13,7 @@ depends: [
   "dune" {>= "3.15"}
   "ptime" {>= "1.1"}
   "ppxlib" {>= "0.32"}
+  "ppx_unicode" {>= "0.0.1"}
   "odoc" {with-doc}
 ]
 build: [