diff --git a/Cargo.toml b/Cargo.toml
index 1e27df1..e4ace49 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -42,7 +42,7 @@ debug-assertions = false
 name = "singlethread"
 required-features = ["nothreads"]
 [dependencies.erased-serde]
-version = "0.3"
+version = "0.4"
 optional = true
 
 [features]
