diff --git a/newsfragments/3152.packaging.md b/newsfragments/3152.packaging.md
new file mode 100644
index 00000000..48309f35
--- /dev/null
+++ b/newsfragments/3152.packaging.md
@@ -0,0 +1 @@
+Correct dependency on syn to version 1.0.85 instead of the incorrect version 1.0.56.
diff --git a/pyo3-macros-backend/Cargo.toml b/pyo3-macros-backend/Cargo.toml
index b348af5d..bb95a0cd 100644
--- a/pyo3-macros-backend/Cargo.toml
+++ b/pyo3-macros-backend/Cargo.toml
@@ -18,7 +18,7 @@ quote = { version = "1", default-features = false }
 proc-macro2 = { version = "1", default-features = false }
 
 [dependencies.syn]
-version = "1.0.56"
+version = "1.0.85"
 default-features = false
 features = ["derive", "parsing", "printing", "clone-impls", "full", "extra-traits"]
 
diff --git a/pyo3-macros/Cargo.toml b/pyo3-macros/Cargo.toml
index cf225540..47f3eb23 100644
--- a/pyo3-macros/Cargo.toml
+++ b/pyo3-macros/Cargo.toml
@@ -21,5 +21,5 @@ abi3 = ["pyo3-macros-backend/abi3"]
 [dependencies]
 proc-macro2 = { version = "1", default-features = false }
 quote = "1"
-syn = { version = "1.0.56", features = ["full", "extra-traits"] }
+syn = { version = "1.0.85", features = ["full", "extra-traits"] }
 pyo3-macros-backend = { path = "../pyo3-macros-backend", version = "=0.18.3" }