diff --git a/code-samples/serving/cloudevents/cloudevents-rust/Cargo.lock b/code-samples/serving/cloudevents/cloudevents-rust/Cargo.lock
index d484aa8d88..4ab449114d 100644
--- a/code-samples/serving/cloudevents/cloudevents-rust/Cargo.lock
+++ b/code-samples/serving/cloudevents/cloudevents-rust/Cargo.lock
@@ -106,7 +106,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "a60f9ba7c4e6df97f3aacb14bb5c0cd7d98a49dcbaed0d7f292912ad9a6a3ed2"
 dependencies = [
  "quote",
- "syn",
+ "syn 1.0.96",
 ]
 
 [[package]]
@@ -293,7 +293,7 @@ checksum = "750ca8fb60bbdc79491991650ba5d2ae7cd75f3fc00ead51390cfe9efda0d4d8"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn",
+ "syn 1.0.96",
 ]
 
 [[package]]
@@ -334,7 +334,7 @@ checksum = "a265e3abeffdce30b2e26b7a11b222fe37c6067404001b434101457d0385eb92"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn",
+ "syn 1.0.96",
 ]
 
 [[package]]
@@ -626,7 +626,7 @@ checksum = "ee7e7ea0dba407429d816e8e38dda1a467cd74737722f2ccc8eae60429a1a3ab"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn",
+ "syn 1.0.96",
 ]
 
 [[package]]
@@ -637,7 +637,7 @@ checksum = "2127768764f1556535c01b5326ef94bd60ff08dcfbdc544d53e69ed155610f5d"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn",
+ "syn 1.0.96",
 ]
 
 [[package]]
@@ -691,7 +691,7 @@ dependencies = [
  "heck",
  "proc-macro2",
  "quote",
- "syn",
+ "syn 1.0.96",
 ]
 
 [[package]]
@@ -758,9 +758,9 @@ dependencies = [
 
 [[package]]
 name = "futures-channel"
-version = "0.3.5"
+version = "0.3.28"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f366ad74c28cca6ba456d95e6422883cfb4b252a83bed929c83abfdbbf2967d5"
+checksum = "955518d47e09b25bbebc7a18df10b81f0c766eaf4c4f1cccef2fca5f2a4fb5f2"
 dependencies = [
  "futures-core",
  "futures-sink",
@@ -768,9 +768,9 @@ dependencies = [
 
 [[package]]
 name = "futures-core"
-version = "0.3.5"
+version = "0.3.28"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "59f5fff90fd5d971f936ad674802482ba441b6f09ba5e15fd8b39145582ca399"
+checksum = "4bca583b7e26f571124fe5b7561d49cb2868d79116cfa0eefce955557c6fee8c"
 
 [[package]]
 name = "futures-executor"
@@ -785,27 +785,26 @@ dependencies = [
 
 [[package]]
 name = "futures-io"
-version = "0.3.5"
+version = "0.3.28"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "de27142b013a8e869c14957e6d2edeef89e97c289e69d042ee3a49acd8b51789"
+checksum = "4fff74096e71ed47f8e023204cfd0aa1289cd54ae5430a9523be060cdb849964"
 
 [[package]]
 name = "futures-macro"
-version = "0.3.5"
+version = "0.3.28"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d0b5a30a4328ab5473878237c447333c093297bded83a4983d10f4deea240d39"
+checksum = "89ca545a94061b6365f2c7355b4b32bd20df3ff95f02da9329b34ccc3bd6ee72"
 dependencies = [
- "proc-macro-hack",
  "proc-macro2",
  "quote",
- "syn",
+ "syn 2.0.18",
 ]
 
 [[package]]
 name = "futures-sink"
-version = "0.3.5"
+version = "0.3.28"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3f2032893cb734c7a05d85ce0cc8b8c4075278e93b24b66f9de99d6eb0fa8acc"
+checksum = "f43be4fe21a13b9781a69afa4985b0f6ee0e1afab2c6f454a8cf30e2b2237b6e"
 
 [[package]]
 name = "futures-task"
@@ -815,9 +814,9 @@ checksum = "76d3d132be6c0e6aa1534069c705a74a5997a356c0dc2f86a47765e5617c5b65"
 
 [[package]]
 name = "futures-util"
-version = "0.3.5"
+version = "0.3.28"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8764574ff08b701a084482c3c7031349104b07ac897393010494beaa18ce32c6"
+checksum = "26b01e40b772d54cf6c6d721c1d1abd0647a0106a12ecaa1c186273392a69533"
 dependencies = [
  "futures-channel",
  "futures-core",
@@ -826,10 +825,8 @@ dependencies = [
  "futures-sink",
  "futures-task",
  "memchr",
- "pin-project 0.4.17",
+ "pin-project-lite 0.2.9",
  "pin-utils",
- "proc-macro-hack",
- "proc-macro-nested",
  "slab",
 ]
 
@@ -1340,7 +1337,7 @@ checksum = "e58db2081ba5b4c93bd6be09c40fd36cb9193a8336c384f3b40012e531aa7e40"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn",
+ "syn 1.0.96",
 ]
 
 [[package]]
@@ -1351,7 +1348,7 @@ checksum = "744b6f092ba29c3650faf274db506afd39944f48420f6c86b17cfe0ee1cb36bb"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn",
+ "syn 1.0.96",
 ]
 
 [[package]]
@@ -1384,17 +1381,11 @@ version = "0.5.15"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "0d659fe7c6d27f25e9d80a1a094c223f5246f6a6596453e09d7229bf42750b63"
 
-[[package]]
-name = "proc-macro-nested"
-version = "0.1.4"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8e946095f9d3ed29ec38de908c22f95d9ac008e424c7bcae54c75a79c527c694"
-
 [[package]]
 name = "proc-macro2"
-version = "1.0.39"
+version = "1.0.60"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c54b25569025b7fc9651de43004ae593a75ad88543b17178aa5e1b9c4f15f56f"
+checksum = "dec2b086b7a862cf4de201096214fa870344cf922b2b30c167badb3af3195406"
 dependencies = [
  "unicode-ident",
 ]
@@ -1407,9 +1398,9 @@ checksum = "a1d01941d82fa2ab50be1e79e6714289dd7cde78eba4c074bc5a4374f650dfe0"
 
 [[package]]
 name = "quote"
-version = "1.0.6"
+version = "1.0.28"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "54a21852a652ad6f610c9510194f398ff6f8692e334fd1145fed931f7fbe44ea"
+checksum = "1b9ab9c7eadfd8df19006f1cf1a4aed13540ed5cbc047010ece5826e10825488"
 dependencies = [
  "proc-macro2",
 ]
@@ -1667,7 +1658,7 @@ checksum = "818fbf6bfa9a42d3bfcaca148547aa00c7b915bec71d1757aa2d44ca68771984"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn",
+ "syn 1.0.96",
 ]
 
 [[package]]
@@ -1752,7 +1743,7 @@ checksum = "ebf8f7d5720104a9df0f7076a8682024e958bba0fe9848767bb44f251f3648e9"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn",
+ "syn 1.0.96",
 ]
 
 [[package]]
@@ -1803,7 +1794,7 @@ dependencies = [
  "quote",
  "serde",
  "serde_derive",
- "syn",
+ "syn 1.0.96",
 ]
 
 [[package]]
@@ -1819,7 +1810,7 @@ dependencies = [
  "serde_derive",
  "serde_json",
  "sha1",
- "syn",
+ "syn 1.0.96",
 ]
 
 [[package]]
@@ -1839,6 +1830,17 @@ dependencies = [
  "unicode-ident",
 ]
 
+[[package]]
+name = "syn"
+version = "2.0.18"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "32d41677bcbe24c20c52e7c70b0d8db04134c5d1066bf98662e2871ad200ea3e"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "unicode-ident",
+]
+
 [[package]]
 name = "termcolor"
 version = "1.1.0"
@@ -1865,7 +1867,7 @@ checksum = "cae2447b6282786c3493999f40a9be2a6ad20cb8bd268b0a0dbf5a065535c0ab"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn",
+ "syn 1.0.96",
 ]
 
 [[package]]
@@ -1931,7 +1933,7 @@ dependencies = [
  "proc-macro2",
  "quote",
  "standback",
- "syn",
+ "syn 1.0.96",
 ]
 
 [[package]]
@@ -2200,7 +2202,7 @@ dependencies = [
  "log",
  "proc-macro2",
  "quote",
- "syn",
+ "syn 1.0.96",
  "wasm-bindgen-shared",
 ]
 
@@ -2234,7 +2236,7 @@ checksum = "8eb197bd3a47553334907ffd2f16507b4f4f01bbec3ac921a7719e0decdfe72a"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn",
+ "syn 1.0.96",
  "wasm-bindgen-backend",
  "wasm-bindgen-shared",
 ]