diff --git a/Cargo.lock b/Cargo.lock
index 093f312..87db53f 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -420,9 +420,9 @@ dependencies = [
 
 [[package]]
 name = "rmp-serde"
-version = "0.15.5"
+version = "1.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "723ecff9ad04f4ad92fe1c8ca6c20d2196d9286e9c60727c4cb5511629260e9d"
+checksum = "f3eedffbfcc6a428f230c04baf8f59bd73c1781361e4286111fe900849aaddaf"
 dependencies = [
  "byteorder",
  "rmp",
diff --git a/crypto_box/Cargo.toml b/crypto_box/Cargo.toml
index 7302a0a..8a3d1cd 100644
--- a/crypto_box/Cargo.toml
+++ b/crypto_box/Cargo.toml
@@ -35,7 +35,7 @@ default-features = false
 [dev-dependencies]
 bincode = "1"
 rand = "0.8"
-rmp-serde = "0.15"
+rmp-serde = "1.0"
 
 [features]
 default = ["alloc", "u64_backend"]