diff --git a/Cargo.toml b/Cargo.toml
index 355f48d..3a1e6f1 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -15,10 +15,10 @@ rust-version = "1.56"
 thiserror-impl = { version = "=1.0.40", path = "impl" }
 
 [dev-dependencies]
-anyhow = "1.0.65"
-ref-cast = "1.0"
-rustversion = "1.0"
-trybuild = { version = "1.0.66", features = ["diff"] }
+anyhow = "1.0.71"
+ref-cast = "1.0.18"
+rustversion = "1.0.13"
+trybuild = { version = "1.0.81", features = ["diff"] }
 
 [workspace]
 members = ["impl"]
diff --git a/impl/Cargo.toml b/impl/Cargo.toml
index c47ab3f..e317e24 100644
--- a/impl/Cargo.toml
+++ b/impl/Cargo.toml
@@ -12,9 +12,9 @@ rust-version = "1.56"
 proc-macro = true
 
 [dependencies]
-proc-macro2 = "1.0"
-quote = "1.0"
-syn = "2.0.1"
+proc-macro2 = "1.0.63"
+quote = "1.0.29"
+syn = "2.0.23"
 
 [package.metadata.docs.rs]
 targets = ["x86_64-unknown-linux-gnu"]