diff --git a/Cargo.toml b/Cargo.toml
index 6104be2..aee4970 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -51,7 +51,7 @@ seq_io = "0.3"
 # for testing with the FormatSpecimens.jl repo samples
 serde = "1.0"
 serde_derive = "1.0"
-toml = "0.8"
+toml = "0.9"
 
 [profile.release]
 lto = true