diff --git a/README.md b/README.md
index 98df110..40e1a8b 100644
--- a/README.md
+++ b/README.md
@@ -73,6 +73,7 @@ There are additional inputs if you want to be able to assign issues to projects.
 * C++
 * C#
 * CSS
+* Crystal
 * Dart
 * Elixir
 * Go
diff --git a/syntax.json b/syntax.json
index 60f79c7..374112e 100644
--- a/syntax.json
+++ b/syntax.json
@@ -591,5 +591,14 @@
         }
       }
     ]
+  },
+  {
+    "language": "Crystal",
+    "markers": [
+      {
+        "type": "line",
+        "pattern": "#"
+      }
+    ]
   }
 ]