diff --git a/Cargo.toml b/Cargo.toml
index 582f812..48e6075 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -13,7 +13,7 @@ rust-version = "1.56.0"
 exclude = ["images/", "tests/", "miette-derive/"]
 
 [dependencies]
-thiserror = "1.0.26"
+thiserror = "1.0.40"
 miette-derive = { path = "miette-derive", version = "=5.6.0" }
 once_cell = "1.8.0"
 unicode-width = "0.1.9"
@@ -35,7 +35,7 @@ futures = { version = "0.3", default-features = false }
 indenter = "0.3.0"
 rustversion = "1.0"
 trybuild = { version = "1.0.19", features = ["diff"] }
-syn = { version = "1.0", features = ["full"] }
+syn = { version = "2.0", features = ["full"] }
 regex = "1.5"
 lazy_static = "1.4"