diff --git a/serde_codegen/Cargo.toml b/serde_codegen/Cargo.toml
index abd9366d..13d69841 100644
--- a/serde_codegen/Cargo.toml
+++ b/serde_codegen/Cargo.toml
@@ -26,5 +26,5 @@ post-expansion = "0.1.0"
 quote = "0.3"
 serde_codegen_internals = { version = "=0.10.0", default-features = false, path = "../serde_codegen_internals" }
 syn = { version = "0.9", features = ["aster", "visit"] }
-syntex = { version = "^0.45.0", optional = true }
-syntex_syntax = { version = "^0.45.0", optional = true }
+syntex = { version = "^0.46.0", optional = true }
+syntex_syntax = { version = "^0.46.0", optional = true }