diff --git a/manifest.toml b/manifest.toml
index a12d049..366ecce 100644
--- a/manifest.toml
+++ b/manifest.toml
@@ -33,7 +33,7 @@ gleam_crypto = { version = ">= 1.0.0 and < 2.0.0" }
 gleam_erlang = { version = ">= 0.21.0 and < 2.0.0" }
 gleam_http = { version = ">= 3.5.0 and < 4.0.0" }
 gleam_json = { version = ">= 0.6.0 and < 3.0.0" }
-gleam_stdlib = { version = ">= 0.34.0 and < 2.0.0" }
+gleam_stdlib = { version = ">= 0.43.0 and < 2.0.0" }
 gleeunit = { version = ">= 1.0.0 and < 2.0.0" }
 logging = { version = ">= 1.2.0 and < 2.0.0" }
 marceau = { version = ">= 1.1.0 and < 2.0.0" }