diff --git a/Cargo.toml b/Cargo.toml
index 4d30c9b72..21bb6a892 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -42,7 +42,7 @@ hyper = "1"
 frunk = { version = "0.4", optional = true }
 frunk-enum-core = { version = "0.3", optional = true }
 frunk-enum-derive = { version = "0.3", optional = true }
-frunk_core = { version = "0.4", optional = true }
+frunk_core = { version = "0.5", optional = true }
 frunk_derives = { version = "0.4", optional = true }
 
 # Client