diff --git a/doc/dev.md b/doc/dev.md
index 352e9031..43d084dc 100644
--- a/doc/dev.md
+++ b/doc/dev.md
@@ -86,6 +86,8 @@ something in a sqlite / mysql DB and reads something from it.
 Keep notes here about how adding libraries and classes to Babashka affects the binary size.
 We're registering the size of the macOS binary (as built on CircleCI).
 
+2020/10/30 Without httpkit client+server: 68113436. With: 69503316 = 1390kb added.
+
 2020/05/01 Removed `next.jdbc` and postgres JDBC driver: 48304980
 
 2020/04/23 Added `next.jdbc` and postgres JDBC driver: