diff --git a/Cargo.toml b/Cargo.toml
index 5f3793d8..fc48441a 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -2,7 +2,7 @@
 authors = ["Nick Fitzgerald <fitzgen@gmail.com>"]
 edition = "2018"
 name = "walrus"
-version = "0.21.3"
+version = "0.22.0"
 license = "MIT/Apache-2.0"
 readme = "README.md"
 categories = ["wasm"]
@@ -28,7 +28,7 @@ id-arena = "2.2.1"
 leb128 = "0.2.4"
 log = "0.4.8"
 rayon = { version = "1.1.0", optional = true }
-walrus-macro = { path = './crates/macro', version = '=0.19.0' }
+walrus-macro = { path = './crates/macro', version = '=0.22.0' }
 wasm-encoder = "0.212.0"
 wasmparser = "0.212.0"
 gimli = "0.26.0"
diff --git a/crates/macro/Cargo.toml b/crates/macro/Cargo.toml
index 8fd4435b..6fca341d 100644
--- a/crates/macro/Cargo.toml
+++ b/crates/macro/Cargo.toml
@@ -2,7 +2,7 @@
 authors = ["Nick Fitzgerald <fitzgen@gmail.com>"]
 edition = "2018"
 name = "walrus-macro"
-version = "0.19.0"
+version = "0.22.0"
 license = "MIT/Apache-2.0"
 categories = ["wasm"]
 repository = "https://github.com/rustwasm/walrus/tree/crates/macro"
@@ -13,10 +13,10 @@ Internal macros used by the `walrus` crate, not for public consumption.
 """
 
 [dependencies]
-heck = "0.3.1"
-proc-macro2 = "1.0.1"
-quote = "1.0.2"
-syn = { version = "2.0.0", features = ['extra-traits'] }
+heck = "0.5.0"
+proc-macro2 = "1.0.86"
+quote = "1.0.37"
+syn = { version = "2.0.77", features = ['extra-traits'] }
 
 [lib]
 proc-macro = true
diff --git a/crates/macro/src/lib.rs b/crates/macro/src/lib.rs
index 36731a7a..12161de2 100755
--- a/crates/macro/src/lib.rs
+++ b/crates/macro/src/lib.rs
@@ -3,7 +3,7 @@
 extern crate proc_macro;
 
 use self::proc_macro::TokenStream;
-use heck::SnakeCase;
+use heck::ToSnakeCase;
 use proc_macro2::Span;
 use quote::quote;
 use syn::ext::IdentExt;