diff --git a/README.md b/README.md
index 0b021b9..d79ff05 100644
--- a/README.md
+++ b/README.md
@@ -79,6 +79,7 @@ There are additional inputs if you want to be able to assign issues to projects.
 * Go
 * Handlebars
 * HCL
+* Haskell
 * HTML
 * Java
 * JavaScript
diff --git a/syntax.json b/syntax.json
index 70c6424..fbdb5f3 100644
--- a/syntax.json
+++ b/syntax.json
@@ -323,6 +323,22 @@
       }
     ]
   },
+  {
+    "language": "Haskell",
+    "markers": [
+      {
+        "type": "line",
+        "pattern": "--"
+      },
+      {
+        "type": "block",
+        "pattern": {
+          "start": "{-",
+          "end": "-}"
+        }
+      }
+    ]
+  },
   {
     "language": "HTML",
     "markers": [