diff --git a/Cargo.lock b/Cargo.lock
index 95708d84..a5b547e4 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -5904,9 +5904,9 @@ dependencies = [
 
 [[package]]
 name = "parity-scale-codec"
-version = "3.6.4"
+version = "3.6.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "dd8e946cc0cc711189c0b0249fb8b599cbeeab9784d83c415719368bb8d4ac64"
+checksum = "756d439303e94fae44f288ba881ad29670c65b0c4b0e05674ca81061bb65f2c5"
 dependencies = [
  "arrayvec",
  "bitvec 1.0.1",
@@ -8907,9 +8907,9 @@ dependencies = [
 
 [[package]]
 name = "serde"
-version = "1.0.171"
+version = "1.0.167"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "30e27d1e4fd7659406c492fd6cfaf2066ba8773de45ca75e855590f856dc34a9"
+checksum = "7daf513456463b42aa1d94cff7e0c24d682b429f020b9afa4f5ba5c40a22b237"
 dependencies = [
  "serde_derive",
 ]
@@ -8934,9 +8934,9 @@ dependencies = [
 
 [[package]]
 name = "serde_derive"
-version = "1.0.171"
+version = "1.0.167"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "389894603bd18c46fa56231694f8d827779c0951a667087194cf9de94ed24682"
+checksum = "b69b106b68bc8054f0e974e70d19984040f8a5cf9215ca82626ea4853f82c4b9"
 dependencies = [
  "proc-macro2",
  "quote",