diff --git a/config.json b/config.json
index 1fee224..6fa47bb 100644
--- a/config.json
+++ b/config.json
@@ -13,7 +13,7 @@
   "online_editor": {
     "indent_style": "space",
     "indent_size": 4,
-    "highlightjs_language": "roc"
+    "highlightjs_language": "haskell"
   },
   "files": {
     "solution": [
@@ -51,15 +51,10 @@
     "paradigm/functional",
     "platform/linux",
     "platform/mac",
-    "platform/windows",
     "typing/strong",
-    "used_for/artificial_intelligence",
     "used_for/backends",
     "used_for/cross_platform_development",
-    "used_for/embedded_systems",
     "used_for/games",
-    "used_for/robotics",
-    "used_for/scientific_calculations",
     "used_for/scripts"
   ]
 }
diff --git a/docs/ABOUT.md b/docs/ABOUT.md
index 249a63a..410928e 100644
--- a/docs/ABOUT.md
+++ b/docs/ABOUT.md
@@ -1,6 +1,7 @@
 # About
 
-Roc is a modern, fast, and safe programming language designed for building reliable software with simplicity in mind. With an emphasis on performance and minimalism, Roc brings a fresh perspective to the world of functional programming, aiming to make it accessible and efficient for developers.
+Roc is a modern, fast, and safe programming language designed for building reliable software with simplicity in mind.
+With an emphasis on performance and minimalism, Roc brings a fresh perspective to the world of functional programming, aiming to make it accessible and efficient for developers.
 
 ## Main Features
 
diff --git a/exercises/practice/leap/Leap.roc b/exercises/practice/leap/Leap.roc
index 4473f63..8881ba7 100644
--- a/exercises/practice/leap/Leap.roc
+++ b/exercises/practice/leap/Leap.roc
@@ -1,4 +1,4 @@
 module [isLeapYear]
 
 isLeapYear = \year ->
-    year > 0
+    crash "Please implement the `isLeapYear` function"