diff --git a/tikz/feed-forward-perceptron/feed-forward-perceptron.png b/tikz/feed-forward-perceptron/feed-forward-perceptron.png
index 3436d4b..fb1a689 100644
Binary files a/tikz/feed-forward-perceptron/feed-forward-perceptron.png and b/tikz/feed-forward-perceptron/feed-forward-perceptron.png differ
diff --git a/tikz/feed-forward-perceptron/feed-forward-perceptron.tex b/tikz/feed-forward-perceptron/feed-forward-perceptron.tex
index ee63a52..cc723f8 100644
--- a/tikz/feed-forward-perceptron/feed-forward-perceptron.tex
+++ b/tikz/feed-forward-perceptron/feed-forward-perceptron.tex
@@ -25,16 +25,16 @@
   \node (h3)[hidden] at (2.5,1) {};
   \node (o1)[output] at (1.5,2) {};
 
-	\draw (b2) -- (o1);
-	\draw (h1) -- (o1);
-	\draw (h2) -- (o1);
-	\draw (h3) -- (o1);
+	\draw[->, thick] (b2) -- (o1);
+	\draw[->, thick] (h1) -- (o1);
+	\draw[->, thick] (h2) -- (o1);
+	\draw[->, thick] (h3) -- (o1);
 
     \foreach \j in {1, ..., 3}{
     	\foreach \i in {1, ..., 5}{
-			\draw (h\j) -- (i\i);
+			\draw[<-, thick] (h\j) -- (i\i);
 		}
-		\draw (h\j) -- (b1);
+		\draw[<-, thick] (h\j) -- (b1);
 	}
 \end{tikzpicture}
 \end{preview}