diff --git a/content/_index.md b/content/_index.md
index 32b67a4..927bcd6 100644
--- a/content/_index.md
+++ b/content/_index.md
@@ -107,8 +107,8 @@ flowchart TD
     Systems a38@ --> DataSci
     a38@{animate: true, animation: fast}
 
-    ei a39@ --> DataSci
-    a39@{animate: true, animation: slow}
+    ei a40@ --> DataSci
+    a40@{animate: true, animation: slow}
 
     click Parquet "https://github.com/apache/parquet-format/" _blank
     click FlatGeoBuf "https://flatgeobuf.org/" _blank