diff --git a/Cargo.lock b/Cargo.lock
index 149d3c251..9e52a121b 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -2471,7 +2471,7 @@ version = "0.1.0"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 1.0.109",
+ "syn 2.0.10",
 ]
 
 [[package]]
@@ -4366,7 +4366,7 @@ version = "0.1.0"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 1.0.109",
+ "syn 2.0.10",
 ]
 
 [[package]]
diff --git a/Cargo.toml b/Cargo.toml
index 420f775dd..8c4126c66 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -127,7 +127,7 @@ sketching = { path = "./libs/sketching" }
 smartstring = "^1.0.1"
 smolset = "^1.3.1"
 sshkeys = "^0.3.1"
-syn = { version = "1.0.109", features = ["full"] }
+syn = { version = "2.0.10", features = ["full"] }
 testkit-macros = { path = "./server/testkit-macros" }
 tide = "^0.16.0"
 # Including brotli *very* slow, so don't do that. Including the "default" feature pulls a mime-type list from the internet on build, which isn't used.
diff --git a/server/lib-macros/src/entry.rs b/server/lib-macros/src/entry.rs
index 1f971cf11..ec2f56057 100644
--- a/server/lib-macros/src/entry.rs
+++ b/server/lib-macros/src/entry.rs
@@ -14,7 +14,7 @@ pub(crate) fn qs_test(_args: &TokenStream, item: TokenStream, with_init: bool) -
         Err(e) => return token_stream_with_error(item, e),
     };
 
-    if let Some(attr) = input.attrs.iter().find(|attr| attr.path.is_ident("test")) {
+    if let Some(attr) = input.attrs.iter().find(|attr| attr.path().is_ident("test")) {
         let msg = "second test attribute is supplied";
         return token_stream_with_error(item, syn::Error::new_spanned(attr, msg));
     };
@@ -104,7 +104,7 @@ pub(crate) fn qs_pair_test(_args: &TokenStream, item: TokenStream, with_init: bo
         Err(e) => return token_stream_with_error(item, e),
     };
 
-    if let Some(attr) = input.attrs.iter().find(|attr| attr.path.is_ident("test")) {
+    if let Some(attr) = input.attrs.iter().find(|attr| attr.path().is_ident("test")) {
         let msg = "second test attribute is supplied";
         return token_stream_with_error(item, syn::Error::new_spanned(attr, msg));
     };
@@ -198,7 +198,7 @@ pub(crate) fn idm_test(_args: &TokenStream, item: TokenStream) -> TokenStream {
         Err(e) => return token_stream_with_error(item, e),
     };
 
-    if let Some(attr) = input.attrs.iter().find(|attr| attr.path.is_ident("test")) {
+    if let Some(attr) = input.attrs.iter().find(|attr| attr.path().is_ident("test")) {
         let msg = "second test attribute is supplied";
         return token_stream_with_error(item, syn::Error::new_spanned(attr, msg));
     };
diff --git a/server/testkit-macros/src/entry.rs b/server/testkit-macros/src/entry.rs
index e6dfb1a86..9b43595b5 100644
--- a/server/testkit-macros/src/entry.rs
+++ b/server/testkit-macros/src/entry.rs
@@ -75,7 +75,7 @@ pub(crate) fn test(_args: &TokenStream, item: TokenStream) -> TokenStream {
         Err(e) => return token_stream_with_error(item, e),
     };
 
-    if let Some(attr) = input.attrs.iter().find(|attr| attr.path.is_ident("test")) {
+    if let Some(attr) = input.attrs.iter().find(|attr| attr.path().is_ident("test")) {
         let msg = "second test attribute is supplied";
         return token_stream_with_error(item, syn::Error::new_spanned(attr, msg));
     };