diff --git a/chapters/8B.ipynb b/chapters/5-2.ipynb
similarity index 99%
rename from chapters/8B.ipynb
rename to chapters/5-2.ipynb
index 972459b..76aa928 100644
--- a/chapters/8B.ipynb
+++ b/chapters/5-2.ipynb
@@ -2540,4 +2540,4 @@
       }
     }
   ]
-}
\ No newline at end of file
+}