diff --git a/README b/README
index f2268ba..ec2d1b7 100644
--- a/README
+++ b/README
@@ -1 +1,5 @@
 UwU
+
+Requirements:
+- calendar
+- ISO8601
diff --git a/src/dune b/src/dune
index dcbb772..5fb4f49 100644
--- a/src/dune
+++ b/src/dune
@@ -1,3 +1,3 @@
 (executable
  (name webcc)
- (libraries omd))
+ (libraries omd ISO8601))
diff --git a/src/webcc.ml b/src/webcc.ml
index 95dae42..1e1506c 100644
--- a/src/webcc.ml
+++ b/src/webcc.ml
@@ -77,10 +77,11 @@ let process ic oc =
     | None   -> "-"
   in
   let md = Omd.of_channel ic in
+  let date = ISO8601.Permissive.date (lookup_metadata "date") in
   let html = format_post
                ~title:(lookup_metadata "title")
                ~tags:(lookup_metadata "tags")
-               ~date:(lookup_metadata "date")
+               ~date:(ISO8601.Permissive.string_of_date date)
                ~contents:(Omd.to_html md)
   in
   output_string oc html