diff --git a/Cargo.toml b/Cargo.toml
index 7b0ba29..fcfc327 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -37,11 +37,11 @@ path = "mod.rs"
 proc-macro = true
 
 [dependencies.proc-macro2]
-version = "1.0.89"
+version = "1"
 
 [dependencies.quote]
-version = "1.0.37"
+version = "1"
 
 [dependencies.syn]
-version = "2.0.87"
+version = "2"
 features = ["full"]