diff --git a/Cargo.toml b/Cargo.toml
index c1c7905..09ad85d 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -39,7 +39,7 @@ proc-macro2 = "1.0.50"
 quote = "1.0.23"
 serde = "1.0.152"
 serde_derive = "1.0.152"
-syn = "1.0.107"
+syn = "2.0.3"
 toml = "0.7.2"
 url = "2.2.2"
 uuid = { version = "1.2.2", features = ["v4"] }
diff --git a/ion_derive/Cargo.toml b/ion_derive/Cargo.toml
index b765eb0..079aa74 100644
--- a/ion_derive/Cargo.toml
+++ b/ion_derive/Cargo.toml
@@ -10,4 +10,4 @@ proc-macro = true
 [dependencies]
 proc-macro2 = "1.0.50"
 quote = "1.0.23"
-syn = "1.0.107"
+syn = "2.0.3"