diff --git a/Cargo.lock b/Cargo.lock
index 46bff573e..85670f1ab 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1436,9 +1436,9 @@ dependencies = [
 
 [[package]]
 name = "fixed"
-version = "0.5.5"
+version = "0.5.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "674c8d867d3652fe552057699fead639cfcdf476510259ee2b6ea3a51bc2ad58"
+checksum = "f4c377839919bd296e5d7dd54c5ce062061b3b3dde1cd20f5e41e21002d2fb2c"
 dependencies = [
  "typenum",
 ]
diff --git a/chain-core/Cargo.toml b/chain-core/Cargo.toml
index 0e22da387..fffd68182 100644
--- a/chain-core/Cargo.toml
+++ b/chain-core/Cargo.toml
@@ -25,7 +25,7 @@ sgx_tstd = { rev = "v1.1.2", git = "https://github.com/apache/teaclave-sgx-sdk.g
 static_assertions = { version = "1.1.0", default-features = false}
 bech32 = { version = "0.7.2", optional = true }
 aead = "0.2"
-fixed = "0.5.5"
+fixed = "0.5.6"
 thiserror = { version = "1.0", default-features = false }
 
 [dev-dependencies]