diff --git a/bindings/ruby/Cargo.lock b/bindings/ruby/Cargo.lock
index e44da7bd..9b39459f 100644
--- a/bindings/ruby/Cargo.lock
+++ b/bindings/ruby/Cargo.lock
@@ -695,9 +695,9 @@ checksum = "112b39cec0b298b6c1999fee3e31427f74f676e4cb9879ed1a121b43661a4154"
 
 [[package]]
 name = "magnus"
-version = "0.8.2"
+version = "0.9.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3b36a5b126bbe97eb0d02d07acfeb327036c6319fd816139a49824a83b7f9012"
+checksum = "379d50b6eea4ca84074ccd3e551eb9b07f7865194d5b3198325317e9ef78e5e9"
 dependencies = [
  "magnus-macros",
  "rb-sys",
@@ -707,9 +707,9 @@ dependencies = [
 
 [[package]]
 name = "magnus-macros"
-version = "0.8.0"
+version = "0.9.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "47607461fd8e1513cb4f2076c197d8092d921a1ea75bd08af97398f593751892"
+checksum = "4ca70566af98184bb92d4d9853daaf533c1a3418b9570d0547ea44970035f3fe"
 dependencies = [
  "proc-macro2",
  "quote",
diff --git a/bindings/ruby/ext/css_inline/Cargo.toml b/bindings/ruby/ext/css_inline/Cargo.toml
index 4494dc88..971b5ed9 100644
--- a/bindings/ruby/ext/css_inline/Cargo.toml
+++ b/bindings/ruby/ext/css_inline/Cargo.toml
@@ -16,7 +16,7 @@ name = "css_inline"
 crate-type = ["cdylib"]
 
 [dependencies]
-magnus = "0.8"
+magnus = "0.9"
 rayon = "1"
 
 [dependencies.css-inline]