diff --git a/dialectic-compiler/Cargo.toml b/dialectic-compiler/Cargo.toml
index 3b35ac69..44af95d3 100644
--- a/dialectic-compiler/Cargo.toml
+++ b/dialectic-compiler/Cargo.toml
@@ -11,7 +11,7 @@ keywords = ["session", "types", "async", "channel", "macro"]
 categories = ["asynchronous", "concurrency"]
 
 [dependencies]
-thunderdome = "0.4"
+thunderdome = "0.6"
 syn = { version = "1.0", features = ["full", "extra-traits"] }
 proc-macro2 = "1.0"
 quote = "1.0"