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 | diff --git a/Cargo.toml b/Cargo.toml
index 5909456..7442445 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -76,13 +76,6 @@ version = "1.0.60"
 [dependencies.quote]
 version = "1"
 
-[dependencies.syn1]
-version = "1"
-features = ["printing"]
-optional = true
-default-features = false
-package = "syn"
-
 [dependencies.syn2]
 version = "2"
 features = [
@@ -94,7 +87,7 @@ default-features = false
 package = "syn"
 
 [dev-dependencies.proc-macro-utils]
-version = "0.8.0"
+version = "0.10.0"
 
 [dev-dependencies.proc-macro2]
 version = "1"
 |