diff --git a/bindings/ruby/Cargo.lock b/bindings/ruby/Cargo.lock
index eef8e9f9..65f0f4bd 100644
--- a/bindings/ruby/Cargo.lock
+++ b/bindings/ruby/Cargo.lock
@@ -770,9 +770,9 @@ checksum = "c41e0c4fef86961ac6d6f8a82609f55f31b05e4fce149ac5710e439df7619ba4"
 
 [[package]]
 name = "magnus"
-version = "0.7.1"
+version = "0.8.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3d87ae53030f3a22e83879e666cb94e58a7bdf31706878a0ba48752994146dab"
+checksum = "bd2ac6e71886be00ac34db92aa732c793c5107c95191805b9a1c7e70e6d342e0"
 dependencies = [
  "magnus-macros",
  "rb-sys",
@@ -782,9 +782,9 @@ dependencies = [
 
 [[package]]
 name = "magnus-macros"
-version = "0.6.0"
+version = "0.8.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5968c820e2960565f647819f5928a42d6e874551cab9d88d75e3e0660d7f71e3"
+checksum = "47607461fd8e1513cb4f2076c197d8092d921a1ea75bd08af97398f593751892"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -1162,9 +1162,9 @@ dependencies = [
 
 [[package]]
 name = "rb-sys-env"
-version = "0.1.2"
+version = "0.2.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a35802679f07360454b418a5d1735c89716bde01d35b1560fc953c1415a0b3bb"
+checksum = "08f8d2924cf136a1315e2b4c7460a39f62ef11ee5d522df9b2750fab55b868b6"
 
 [[package]]
 name = "redox_syscall"
diff --git a/bindings/ruby/ext/css_inline/Cargo.toml b/bindings/ruby/ext/css_inline/Cargo.toml
index 9d9c02cf..5f82873d 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 = "0.7"
+magnus = "0.8"
 rayon = "1"
 
 [dependencies.css-inline]