diff --git a/exo/13/13.md b/exo/13/13.md
index 6b8d78b81b..70c94b8947 100644
--- a/exo/13/13.md
+++ b/exo/13/13.md
@@ -1,4 +1,4 @@
 # Every firstborn of a donkey
 
-Israel is given a choice to kill the firstborn donkey or buy it back with a lamb./
+Israel is given a choice to kill the firstborn donkey or buy it back with a lamb.