diff --git a/dune-project b/dune-project
index 8040c2f8..a15d0426 100644
--- a/dune-project
+++ b/dune-project
@@ -34,9 +34,12 @@
     :with-dev-setup
     (>= 0.24)
     (< 0.25))))
- (depopts
+ (depopts trace)
+ (conflicts
   (trace
-   (>= 0.3)))
+   (or
+    (< 0.3)
+    (>= 0.4))))
  (tags
   (instrumentation tracing opentelemetry datadog jaeger)))
 
diff --git a/opentelemetry.opam b/opentelemetry.opam
index 4ebb692e..168a88e6 100644
--- a/opentelemetry.opam
+++ b/opentelemetry.opam
@@ -18,8 +18,9 @@ depends: [
   "ocaml-lsp-server" {with-dev-setup}
   "ocamlformat" {with-dev-setup & >= "0.24" & < "0.25"}
 ]
-depopts: [
-  "trace" {>= "0.3"}
+depopts: ["trace"]
+conflicts: [
+  "trace" {< "0.3" | >= "0.4"}
 ]
 build: [
   ["dune" "subst"] {dev}