diff --git a/Cargo.lock b/Cargo.lock
index 516f38e..8fefee8 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -783,7 +783,7 @@ checksum = "d6ccf5ede3a895d8856620237b2f02972c1bbc78d2965ad7fe8838d4a0ed41f0"
 dependencies = [
  "bytes 0.4.12",
  "fnv",
- "itoa",
+ "itoa 0.4.7",
 ]
 
 [[package]]
@@ -794,7 +794,7 @@ checksum = "527e8c9ac747e28542699a951517aa9a6945af506cd1f2e1b53a576c17b6cc11"
 dependencies = [
  "bytes 1.0.1",
  "fnv",
- "itoa",
+ "itoa 0.4.7",
 ]
 
 [[package]]
@@ -876,7 +876,7 @@ dependencies = [
  "http-body 0.3.1",
  "httparse",
  "httpdate 0.3.2",
- "itoa",
+ "itoa 0.4.7",
  "pin-project",
  "socket2 0.3.19",
  "tokio 0.2.25",
@@ -900,7 +900,7 @@ dependencies = [
  "http-body 0.4.3",
  "httparse",
  "httpdate 1.0.1",
- "itoa",
+ "itoa 0.4.7",
  "pin-project-lite 0.2.7",
  "socket2 0.4.1",
  "tokio 1.10.0",
@@ -1063,6 +1063,12 @@ version = "0.4.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "dd25036021b0de88a0aff6b850051563c6516d0bf53f8638938edbb9de732736"
 
+[[package]]
+name = "itoa"
+version = "1.0.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "fad582f4b9e86b6caa621cabeb0963332d92eea04729ab12892c2533951e6440"
+
 [[package]]
 name = "js-sys"
 version = "0.3.52"
@@ -2216,11 +2222,11 @@ dependencies = [
 
 [[package]]
 name = "serde_json"
-version = "1.0.66"
+version = "1.0.91"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "336b10da19a12ad094b59d870ebde26a45402e5b470add4b5fd03c5048a32127"
+checksum = "877c235533714907a8c2464236f5c4b2a17262ef1bd71f38f35ea592c8da6883"
 dependencies = [
- "itoa",
+ "itoa 1.0.5",
  "ryu",
  "serde",
 ]
@@ -2232,7 +2238,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "edfa57a7f8d9c1d260a549e7224100f6c43d43f9103e06dd8b4095a9b2b43ce9"
 dependencies = [
  "form_urlencoded",
- "itoa",
+ "itoa 0.4.7",
  "ryu",
  "serde",
 ]