diff --git a/gleam/gleam.toml b/gleam/gleam.toml
index 5fac6423..dbdb19c5 100644
--- a/gleam/gleam.toml
+++ b/gleam/gleam.toml
@@ -10,7 +10,7 @@ description = "A Gleam project"
 # links = [{ title = "Website", href = "https://gleam.run" }]
 
 [dependencies]
-gleam_stdlib = "~> 0.39"
+gleam_stdlib = "~> 0.39 or ^0.40.0"
 
 [dev-dependencies]
 gleeunit = "~> 1.0"