diff --git a/homework/hw04.md b/homework/hw04.md
index a8dc42b..1153c1a 100644
--- a/homework/hw04.md
+++ b/homework/hw04.md
@@ -18,6 +18,8 @@ module names in Haskell have to start with capital letters.
 As the file containing the module code must
 be of the same name as the module name,
 **all your code is required to be in a single file called `Hw4.hs`**.
+
+::: danger IMPORTANT
 Your file `Hw4.hs` has to start with the following lines:
 
 ```haskell
@@ -26,8 +28,9 @@ module Hw4 where
 import Control.Applicative
 import Data.Char
 import Parser
-import Hw3 
+import Hw3  -- you need this import to pass tests on BRUTE
 ```
+:::
 
 There are four imports. The first two necessary libraries so that the definitions from 
 Lecture 11 work. The third is the module `Parser` whose code is [here](#parser-module). 
@@ -46,6 +49,7 @@ data Expr = Var Symbol
           | App Expr Expr
           | Lambda Symbol Expr deriving Eq
 ```
+**For passing all BRUTE tests you still need the `import Hw3`!**
 
 ## Parser specification