diff --git a/README.md b/README.md
index 5149dbc..748c8ab 100644
--- a/README.md
+++ b/README.md
@@ -3029,7 +3029,7 @@ def update_speed(mario, tiles, pressed):
     x, y = mario.spd
     x += 2 * ((D.e in pressed) - (D.w in pressed))
     x -= x // abs(x) if x else 0
-    y += 1 if D.s not in get_boundaries(mario.rect, tiles) else (-10 if D.n in pressed else 0)
+    y += 1 if D.s not in get_boundaries(mario.rect, tiles) else (D.n in pressed) * -10
     mario.spd = P(*[max(-limit, min(limit, s)) for limit, s in zip(MAX_SPEED, P(x, y))])
 
 def update_position(mario, tiles):
diff --git a/index.html b/index.html
index 80e1112..e99b60d 100644
--- a/index.html
+++ b/index.html
@@ -2587,7 +2587,7 @@ SIZE, MAX_SPEED = <span class="hljs-number">50</span>, P(<span class="hljs-numbe
     x, y = mario.spd
     x += <span class="hljs-number">2</span> * ((D.e <span class="hljs-keyword">in</span> pressed) - (D.w <span class="hljs-keyword">in</span> pressed))
     x -= x // abs(x) <span class="hljs-keyword">if</span> x <span class="hljs-keyword">else</span> <span class="hljs-number">0</span>
-    y += <span class="hljs-number">1</span> <span class="hljs-keyword">if</span> D.s <span class="hljs-keyword">not</span> <span class="hljs-keyword">in</span> get_boundaries(mario.rect, tiles) <span class="hljs-keyword">else</span> (<span class="hljs-number">-10</span> <span class="hljs-keyword">if</span> D.n <span class="hljs-keyword">in</span> pressed <span class="hljs-keyword">else</span> <span class="hljs-number">0</span>)
+    y += <span class="hljs-number">1</span> <span class="hljs-keyword">if</span> D.s <span class="hljs-keyword">not</span> <span class="hljs-keyword">in</span> get_boundaries(mario.rect, tiles) <span class="hljs-keyword">else</span> (D.n <span class="hljs-keyword">in</span> pressed) * <span class="hljs-number">-10</span>
     mario.spd = P(*[max(-limit, min(limit, s)) <span class="hljs-keyword">for</span> limit, s <span class="hljs-keyword">in</span> zip(MAX_SPEED, P(x, y))])
 
 <span class="hljs-function"><span class="hljs-keyword">def</span> <span class="hljs-title">update_position</span><span class="hljs-params">(mario, tiles)</span>:</span>