diff --git a/Cargo.lock b/Cargo.lock
index 3f2d9049..ba0a6f93 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1199,9 +1199,9 @@ dependencies = [
 
 [[package]]
 name = "rmp-serde"
-version = "0.15.5"
+version = "1.1.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "723ecff9ad04f4ad92fe1c8ca6c20d2196d9286e9c60727c4cb5511629260e9d"
+checksum = "c5b13be192e0220b8afb7222aa5813cb62cc269ebb5cac346ca6487681d2913e"
 dependencies = [
  "byteorder",
  "rmp",
diff --git a/Cargo.toml b/Cargo.toml
index 34c2d3f3..53fdbc31 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -35,7 +35,7 @@ serde =  { version = "1.0", features = ["derive", "rc"] }
 seahash = "3"   # seahash 4 introduces a breaking hash algorithm change
 memchr = "2.4"
 base64 = "0.13"
-rmp-serde = "0.15"
+rmp-serde = "1.1"
 lifeguard = { version = "^ 0.6.1", optional = true }
 cssparser = { version = "0.28", optional = true }
 selectors = { version = "0.23", optional = true }