diff --git a/dune b/dune
index 1b55029c..7a66c521 100644
--- a/dune
+++ b/dune
@@ -4,5 +4,5 @@
  (_
   (flags :standard -warn-error -a+8+9 -w +a-4-32-40-41-42-44-48-70 -color
     always -strict-sequence -safe-string -short-paths)
-  (ocamlopt_flags :standard -O3 -color always -unbox-closures
+  (ocamlopt_flags :standard -O3 -color always -inline 30 -unbox-closures
     -unbox-closures-factor 20)))