diff --git a/Cargo.toml b/Cargo.toml
index 797b227b5..e4cd45752 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -60,11 +60,11 @@ borsh           = { version = "1", default-features = false, features = [ "deriv
 displaydoc      = { version = "0.2", default-features = false }
 prost           = { version = "0.12", default-features = false }
 derive_more     = { version = "0.99.17", default-features = false, features = [ "from", "into", "display", "try_into" ] }
-rstest          = { version = "0.19" }
+rstest          = { version = "0.21" }
 schemars        = { version = "0.8.15" }
 sha2            = { version = "0.10.8", default-features = false }
 serde           = { version = "1.0", default-features = false }
-serde_json      = { package = "serde-json-wasm", version = "1.0.1", default-features = false }
+serde-json      = { package = "serde-json-wasm", version = "1.0.1", default-features = false }
 subtle-encoding = { version = "0.5", default-features = false }
 
 # ibc dependencies
diff --git a/ci/cw-check/Cargo.toml b/ci/cw-check/Cargo.toml
index fdb27f2cd..31627ddc3 100644
--- a/ci/cw-check/Cargo.toml
+++ b/ci/cw-check/Cargo.toml
@@ -7,11 +7,11 @@ version = "0.1.0"
 crate-type = [ "cdylib", "rlib" ]
 
 [dependencies]
-ibc-apps        = { path = "../../ibc-apps", default_features = false, features = [ "serde", "parity-scale-codec" ] }
+ibc-apps        = { path = "../../ibc-apps", default-features = false, features = [ "serde", "parity-scale-codec" ] }
 ibc-core        = { path = "../../ibc-core", features = [ "serde", "parity-scale-codec", "schema" ] }
 cosmwasm-std    = { version = "1.5.4", default-features = false }
 cosmwasm-schema = { version = "1.5.4", default-features = false }
-serde_json      = { package = "serde-json-wasm", version = "^1.0.1", default-features = false }
+serde-json      = { package = "serde-json-wasm", version = "^1.0.1", default-features = false }
 thiserror       = { version = "^1.0", default-features = false }
 
 [profile.release]
diff --git a/ibc-apps/ics20-transfer/Cargo.toml b/ibc-apps/ics20-transfer/Cargo.toml
index b904e0902..0f36a3700 100644
--- a/ibc-apps/ics20-transfer/Cargo.toml
+++ b/ibc-apps/ics20-transfer/Cargo.toml
@@ -20,7 +20,7 @@ all-features = true
 
 [dependencies]
 # external dependencies
-serde_json = { workspace = true, optional = true }
+serde-json = { workspace = true, optional = true }
 
 # ibc dependencies
 ibc-core               = { workspace = true }
@@ -34,12 +34,12 @@ default = [ "std" ]
 std = [
   "ibc-app-transfer-types/std",
   "ibc-core/std",
-  "serde_json/std",
+  "serde-json/std",
 ]
 serde = [
   "ibc-app-transfer-types/serde",
   "ibc-core/serde",
-  "serde_json",
+  "dep:serde-json",
 ]
 schema = [
   "ibc-app-transfer-types/schema",
diff --git a/ibc-apps/ics20-transfer/types/Cargo.toml b/ibc-apps/ics20-transfer/types/Cargo.toml
index f967ce8f7..5d8da8aca 100644
--- a/ibc-apps/ics20-transfer/types/Cargo.toml
+++ b/ibc-apps/ics20-transfer/types/Cargo.toml
@@ -37,14 +37,14 @@ parity-scale-codec = { workspace = true, optional = true }
 scale-info         = { workspace = true, optional = true }
 
 [dev-dependencies]
-serde_json = { workspace = true }
+serde-json = { workspace = true }
 rstest     = { workspace = true }
 
 [features]
 default = [ "std" ]
 std = [
   "serde/std",
-  "serde_json/std",
+  "serde-json/std",
   "displaydoc/std",
   "uint/std",
   "primitive-types/std",
diff --git a/ibc-apps/ics721-nft-transfer/Cargo.toml b/ibc-apps/ics721-nft-transfer/Cargo.toml
index f1146b970..2b3149f99 100644
--- a/ibc-apps/ics721-nft-transfer/Cargo.toml
+++ b/ibc-apps/ics721-nft-transfer/Cargo.toml
@@ -20,7 +20,7 @@ all-features = true
 
 [dependencies]
 # external dependencies
-serde_json = { workspace = true, optional = true }
+serde-json = { workspace = true, optional = true }
 
 # ibc dependencies
 ibc-app-nft-transfer-types = { workspace = true }
@@ -31,12 +31,12 @@ default = [ "std" ]
 std = [
   "ibc-app-nft-transfer-types/std",
   "ibc-core/std",
-  "serde_json/std",
+  "serde-json/std",
 ]
 serde = [
   "ibc-app-nft-transfer-types/serde",
   "ibc-core/serde",
-  "serde_json",
+  "dep:serde-json",
 ]
 schema = [
   "ibc-app-nft-transfer-types/schema",
diff --git a/ibc-apps/ics721-nft-transfer/types/Cargo.toml b/ibc-apps/ics721-nft-transfer/types/Cargo.toml
index b520aebdc..a490538be 100644
--- a/ibc-apps/ics721-nft-transfer/types/Cargo.toml
+++ b/ibc-apps/ics721-nft-transfer/types/Cargo.toml
@@ -28,7 +28,7 @@ http        = { version = "1.0.0" }
 mime        = { version = "0.3.17" }
 schemars    = { workspace = true, optional = true }
 serde       = { workspace = true, optional = true }
-serde_json  = { workspace = true }
+serde-json  = { workspace = true }
 
 # ibc dependencies
 ibc-core               = { workspace = true }
@@ -46,7 +46,7 @@ rstest = { workspace = true }
 default = [ "std" ]
 std = [
   "serde/std",
-  "serde_json/std",
+  "serde-json/std",
   "base64/std",
   "displaydoc/std",
   "http/std",
diff --git a/ibc-clients/ics07-tendermint/types/Cargo.toml b/ibc-clients/ics07-tendermint/types/Cargo.toml
index d52a1f260..8bb4b70ec 100644
--- a/ibc-clients/ics07-tendermint/types/Cargo.toml
+++ b/ibc-clients/ics07-tendermint/types/Cargo.toml
@@ -41,7 +41,7 @@ parity-scale-codec = { workspace = true, optional = true }
 scale-info         = { workspace = true, optional = true }
 
 [dev-dependencies]
-serde_json     = { workspace = true }
+serde-json     = { workspace = true }
 tendermint-rpc = { workspace = true }
 
 [features]
@@ -49,7 +49,7 @@ default = [ "std" ]
 std = [
   "displaydoc/std",
   "serde/std",
-  "serde_json/std",
+  "serde-json/std",
   "ibc-core-client-types/std",
   "ibc-core-commitment-types/std",
   "ibc-core-host-types/std",
diff --git a/ibc-clients/ics08-wasm/types/Cargo.toml b/ibc-clients/ics08-wasm/types/Cargo.toml
index 57c73e78b..70b62e6a1 100644
--- a/ibc-clients/ics08-wasm/types/Cargo.toml
+++ b/ibc-clients/ics08-wasm/types/Cargo.toml
@@ -30,7 +30,7 @@ ibc-proto           = { workspace = true }
 
 [dev-dependencies]
 rstest     = { workspace = true }
-serde_json = { workspace = true }
+serde-json = { workspace = true }
 
 [features]
 default = [ "std" ]
diff --git a/ibc-core/ics24-host/types/Cargo.toml b/ibc-core/ics24-host/types/Cargo.toml
index 80c1efb2b..7ad95dcc0 100644
--- a/ibc-core/ics24-host/types/Cargo.toml
+++ b/ibc-core/ics24-host/types/Cargo.toml
@@ -35,7 +35,7 @@ scale-info         = { workspace = true, optional = true }
 
 [dev-dependencies]
 rstest     = { workspace = true }
-serde_json = { workspace = true }
+serde-json = { workspace = true }
 
 [features]
 default = [ "std" ]
diff --git a/ibc-testkit/Cargo.toml b/ibc-testkit/Cargo.toml
index 1ce60b37c..51b208c91 100644
--- a/ibc-testkit/Cargo.toml
+++ b/ibc-testkit/Cargo.toml
@@ -23,7 +23,7 @@ displaydoc      = { workspace = true }
 parking_lot     = { version = "0.12.1", default-features = false }
 schemars        = { workspace = true, optional = true }
 serde           = { workspace = true, optional = true }
-serde_json      = { workspace = true, optional = true }
+serde-json      = { workspace = true, optional = true }
 subtle-encoding = { workspace = true }
 typed-builder   = { version = "0.18.0" }
 
@@ -47,7 +47,7 @@ rstest = { workspace = true }
 default = [ "std" ]
 std = [
   "serde/std",
-  "serde_json/std",
+  "serde-json/std",
   "ibc/std",
   "ibc-proto/std",
   "tendermint/std",
@@ -56,7 +56,7 @@ serde = [
   "dep:serde",
   "ibc/serde",
   "ibc-proto/serde",
-  "serde_json",
+  "dep:serde-json",
 ]
 schema = [
   "dep:schemars",
diff --git a/ibc-testkit/src/utils/mod.rs b/ibc-testkit/src/utils/mod.rs
index 94163e32e..4ccd1f8ce 100644
--- a/ibc-testkit/src/utils/mod.rs
+++ b/ibc-testkit/src/utils/mod.rs
@@ -32,7 +32,8 @@ where
     let serialized = serde_json::to_string(&parsed0);
     assert!(serialized.is_ok());
     let serialized = serialized.expect("should not fail");
-    assert_eq!(serialized, json_data);
+    // We can't assert the following, as JSON string representation is not canonical.
+    // assert_eq!(serialized, json_data);
 
     let parsed1 = serde_json::from_str::<T>(&serialized);
     assert!(parsed1.is_ok());
diff --git a/tests-integration/Cargo.toml b/tests-integration/Cargo.toml
index 26877042b..766ee9d59 100644
--- a/tests-integration/Cargo.toml
+++ b/tests-integration/Cargo.toml
@@ -13,7 +13,7 @@ description = "Integration tests using `ibc-testkit` and the other IBC crates."
 [dependencies]
 # external dependencies
 serde           = { workspace = true, optional = true }
-serde_json      = { workspace = true, optional = true }
+serde-json      = { workspace = true, optional = true }
 subtle-encoding = { workspace = true }
 tracing         = { version = "0.1.40", default-features = false }
 
@@ -36,7 +36,7 @@ basecoin-store = { version = "0.1.0" }
 tendermint         = { workspace = true }
 tendermint-testgen = { workspace = true }
 
-[dev_dependencies]
+[dev-dependencies]
 cosmwasm-std   = { workspace = true }
 hex            = { version = "0.4.2" }
 rstest         = { workspace = true }
@@ -47,11 +47,9 @@ tendermint-rpc = { workspace = true }
 default = [ "std" ]
 std = [
   "serde/std",
-  "serde_json/std",
+  "serde-json/std",
   "ibc/std",
   "ibc/serde",
   "ibc-testkit/serde",
   "tendermint/std",
-  "dep:serde",
-  "dep:serde_json",
 ]