diff --git a/src/core/dune b/src/core/dune
index b78fea49..c1d58a81 100644
--- a/src/core/dune
+++ b/src/core/dune
@@ -2,7 +2,14 @@
  (name opentelemetry_core)
  (public_name opentelemetry.core)
  (synopsis "Core types and definitions for opentelemetry")
- (flags :standard -warn-error -a+8 -open Opentelemetry_util -open Opentelemetry_atomic)
+ (flags
+  :standard
+  -warn-error
+  -a+8
+  -open
+  Opentelemetry_util
+  -open
+  Opentelemetry_atomic)
  (libraries
   opentelemetry.proto
   opentelemetry.util