diff --git a/num/04/10.md b/num/04/10.md
index e37ea594f5..313e74e3f3 100644
--- a/num/04/10.md
+++ b/num/04/10.md
@@ -1,6 +1,6 @@
-# They must put ... into a covering of sea cow skins
+# They must put ... into a covering of fine leather
 
-"They must cover ... with sea cow skins"
+"They must cover ... with fine leather"
 
 # they must put it on a carrying frame