diff --git a/illicit/macro/Cargo.toml b/illicit/macro/Cargo.toml
index a09e12256..2b798d5b2 100644
--- a/illicit/macro/Cargo.toml
+++ b/illicit/macro/Cargo.toml
@@ -17,4 +17,4 @@ proc-macro = true
 [dependencies]
 proc-macro-error = "1.0.0"
 quote = "1.0"
-syn = { version = "1.0", features = ["full"] }
+syn = { version = "2.0", features = ["full"] }
diff --git a/mox/Cargo.toml b/mox/Cargo.toml
index 7495f3788..b3d615a99 100644
--- a/mox/Cargo.toml
+++ b/mox/Cargo.toml
@@ -20,7 +20,7 @@ proc-macro = true
 proc-macro2 = "1"
 quote = "1"
 syn-rsx = "0.8.0-beta.2"
-syn = "^1"
+syn = "^2"
 
 [dev-dependencies]
 derive_builder = "0.10"
diff --git a/topo/macro/Cargo.toml b/topo/macro/Cargo.toml
index 75b8c749a..29b8760e2 100644
--- a/topo/macro/Cargo.toml
+++ b/topo/macro/Cargo.toml
@@ -16,4 +16,4 @@ proc-macro = true
 
 [dependencies]
 quote = "1.0"
-syn = { version = "1.0", features = ["full"] }
+syn = { version = "2.0", features = ["full"] }