diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index acfff9a0d90..633c622b029 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -255,7 +255,7 @@ publish-docs:
     - git fetch origin gh-pages
     # Generating Docs
     - time cargo doc --no-deps --all-features
-        -p scale-info -p ink_metadata -p ink_metadata_derive -p ink_core -p ink_core_derive
+        -p scale-info -p ink_metadata -p ink_core -p ink_core_derive
         -p ink_primitives -p ink_prelude -p ink_lang -p ink_lang_macro
     # saving README and docs
     - mv target/doc/ /tmp/
diff --git a/core/Cargo.toml b/core/Cargo.toml
index c33e4336538..9d9baf127fe 100644
--- a/core/Cargo.toml
+++ b/core/Cargo.toml
@@ -39,7 +39,7 @@ blake2 = { version = "0.9", optional = true }
 # Sadly couldn't be marked as dev-dependency.
 # Never use this crate outside of the off-chain environment!
 rand = { version = "0.7", default-features = false, features = ["alloc"], optional = true }
-scale-info = { version = "0.2", default-features = false, features = ["derive"], optional = true }
+scale-info = { version = "0.3", default-features = false, features = ["derive"], optional = true }
 
 # Workaround: we actually just need criterion as a dev-dependency, but
 # there is an issue with a doubly included std lib when executing
diff --git a/examples/delegator/Cargo.toml b/examples/delegator/Cargo.toml
index a8c0d7a700c..910e1828ea0 100644
--- a/examples/delegator/Cargo.toml
+++ b/examples/delegator/Cargo.toml
@@ -15,7 +15,7 @@ scale = { package = "parity-scale-codec", version = "1.3", default-features = fa
 adder = { version = "2.1.0", path = "adder", default-features = false, features = ["ink-as-dependency"] }
 subber = { version = "2.1.0", path = "subber", default-features = false, features = ["ink-as-dependency"] }
 accumulator = { version = "2.1.0", path = "accumulator", default-features = false, features = ["ink-as-dependency"] }
-scale-info = { version = "0.2", default-features = false, features = ["derive"], optional = true }
+scale-info = { version = "0.3", default-features = false, features = ["derive"], optional = true }
 
 [lib]
 name = "delegator"
diff --git a/examples/delegator/accumulator/Cargo.toml b/examples/delegator/accumulator/Cargo.toml
index c73e3ca040b..22546b14a96 100644
--- a/examples/delegator/accumulator/Cargo.toml
+++ b/examples/delegator/accumulator/Cargo.toml
@@ -11,7 +11,7 @@ ink_core = { version = "2.1.0", path = "../../../core", default-features = false
 ink_lang = { version = "2.1.0", path = "../../../lang", default-features = false }
 
 scale = { package = "parity-scale-codec", version = "1.3", default-features = false, features = ["derive"] }
-scale-info = { version = "0.2", default-features = false, features = ["derive"], optional = true }
+scale-info = { version = "0.3", default-features = false, features = ["derive"], optional = true }
 
 [lib]
 name = "accumulator"
diff --git a/examples/delegator/adder/Cargo.toml b/examples/delegator/adder/Cargo.toml
index 0927aabbced..4199434d73a 100644
--- a/examples/delegator/adder/Cargo.toml
+++ b/examples/delegator/adder/Cargo.toml
@@ -13,7 +13,7 @@ ink_lang = { version = "2.1.0", path = "../../../lang", default-features = false
 accumulator = { version = "2.1.0", path = "../accumulator", default-features = false, features = ["ink-as-dependency"] }
 
 scale = { package = "parity-scale-codec", version = "1.3", default-features = false, features = ["derive"] }
-scale-info = { version = "0.2", default-features = false, features = ["derive"], optional = true }
+scale-info = { version = "0.3", default-features = false, features = ["derive"], optional = true }
 
 [lib]
 name = "adder"
diff --git a/examples/delegator/subber/Cargo.toml b/examples/delegator/subber/Cargo.toml
index fd871993eb1..ac1afb3b520 100644
--- a/examples/delegator/subber/Cargo.toml
+++ b/examples/delegator/subber/Cargo.toml
@@ -13,7 +13,7 @@ ink_lang = { version = "2.1.0", path = "../../../lang", default-features = false
 accumulator = { version = "2.1.0", path = "../accumulator", default-features = false, features = ["ink-as-dependency"] }
 
 scale = { package = "parity-scale-codec", version = "1.3", default-features = false, features = ["derive"] }
-scale-info = { version = "0.2", default-features = false, features = ["derive"], optional = true }
+scale-info = { version = "0.3", default-features = false, features = ["derive"], optional = true }
 
 [lib]
 name = "subber"
diff --git a/examples/dns/Cargo.toml b/examples/dns/Cargo.toml
index e0b2251b733..ebfea57bb08 100644
--- a/examples/dns/Cargo.toml
+++ b/examples/dns/Cargo.toml
@@ -11,7 +11,7 @@ ink_core = { version = "2.1.0", path = "../../core", default-features = false }
 ink_lang = { version = "2.1.0", path = "../../lang", default-features = false }
 
 scale = { package = "parity-scale-codec", version = "1.3", default-features = false, features = ["derive"] }
-scale-info = { version = "0.2", default-features = false, features = ["derive"], optional = true }
+scale-info = { version = "0.3", default-features = false, features = ["derive"], optional = true }
 
 [lib]
 name = "dns"
diff --git a/examples/erc20/Cargo.toml b/examples/erc20/Cargo.toml
index 278adafc2f1..e3faa083a4c 100644
--- a/examples/erc20/Cargo.toml
+++ b/examples/erc20/Cargo.toml
@@ -11,7 +11,7 @@ ink_core = { version = "2.1.0", path = "../../core", default-features = false }
 ink_lang = { version = "2.1.0", path = "../../lang", default-features = false }
 
 scale = { package = "parity-scale-codec", version = "1.3", default-features = false, features = ["derive"] }
-scale-info = { version = "0.2", default-features = false, features = ["derive"], optional = true }
+scale-info = { version = "0.3", default-features = false, features = ["derive"], optional = true }
 
 [lib]
 name = "erc20"
diff --git a/examples/erc721/Cargo.toml b/examples/erc721/Cargo.toml
index 1ecbfc7b799..0be4ddcdf19 100644
--- a/examples/erc721/Cargo.toml
+++ b/examples/erc721/Cargo.toml
@@ -11,7 +11,7 @@ ink_core = { version = "2.1.0", path = "../../core", default-features = false }
 ink_lang = { version = "2.1.0", path = "../../lang", default-features = false }
 
 scale = { package = "parity-scale-codec", version = "1.3", default-features = false, features = ["derive"] }
-scale-info = { version = "0.2", default-features = false, features = ["derive"], optional = true }
+scale-info = { version = "0.3", default-features = false, features = ["derive"], optional = true }
 
 [lib]
 name = "erc721"
diff --git a/examples/flipper/Cargo.toml b/examples/flipper/Cargo.toml
index bd9b30bd252..7b71ec0d6aa 100644
--- a/examples/flipper/Cargo.toml
+++ b/examples/flipper/Cargo.toml
@@ -11,7 +11,7 @@ ink_core = { version = "2.1.0", path = "../../core", default-features = false }
 ink_lang = { version = "2.1.0", path = "../../lang", default-features = false }
 
 scale = { package = "parity-scale-codec", version = "1.3", default-features = false, features = ["derive"] }
-scale-info = { version = "0.2", default-features = false, features = ["derive"], optional = true }
+scale-info = { version = "0.3", default-features = false, features = ["derive"], optional = true }
 
 [lib]
 name = "flipper"
diff --git a/examples/incrementer/Cargo.toml b/examples/incrementer/Cargo.toml
index 6eae4916db6..4e430362190 100644
--- a/examples/incrementer/Cargo.toml
+++ b/examples/incrementer/Cargo.toml
@@ -11,7 +11,7 @@ ink_core = { version = "2.1.0", path = "../../core", default-features = false }
 ink_lang = { version = "2.1.0", path = "../../lang", default-features = false }
 
 scale = { package = "parity-scale-codec", version = "1.3", default-features = false, features = ["derive"] }
-scale-info = { version = "0.2", default-features = false, features = ["derive"], optional = true }
+scale-info = { version = "0.3", default-features = false, features = ["derive"], optional = true }
 
 [lib]
 name = "incrementer"
diff --git a/examples/multisig_plain/Cargo.toml b/examples/multisig_plain/Cargo.toml
index d93ec43c2f2..3fa9aa649b6 100755
--- a/examples/multisig_plain/Cargo.toml
+++ b/examples/multisig_plain/Cargo.toml
@@ -12,7 +12,7 @@ ink_lang = { version = "2.1.0", path = "../../lang", default-features = false }
 ink_prelude = { version = "2.1.0", path = "../../prelude", default-features = false }
 
 scale = { package = "parity-scale-codec", version = "1.3", default-features = false, features = ["derive"] }
-scale-info = { version = "0.2", default-features = false, features = ["derive"], optional = true }
+scale-info = { version = "0.3", default-features = false, features = ["derive"], optional = true }
 
 [lib]
 name = "multisig_plain"
diff --git a/examples/runtime-storage/Cargo.toml b/examples/runtime-storage/Cargo.toml
index 44db1bc621b..b95575d3e33 100755
--- a/examples/runtime-storage/Cargo.toml
+++ b/examples/runtime-storage/Cargo.toml
@@ -12,7 +12,7 @@ ink_core = { version = "2.1.0", path = "../../core", default-features = false }
 ink_lang = { version = "2.1.0", path = "../../lang", default-features = false }
 
 scale = { package = "parity-scale-codec", version = "1.3", default-features = false, features = ["derive"] }
-scale-info = { version = "0.2", default-features = false, features = ["derive"], optional = true }
+scale-info = { version = "0.3", default-features = false, features = ["derive"], optional = true }
 
 [lib]
 name = "runtime_storage"
diff --git a/lang/macro/Cargo.toml b/lang/macro/Cargo.toml
index 91964f88023..5b1710f93bb 100644
--- a/lang/macro/Cargo.toml
+++ b/lang/macro/Cargo.toml
@@ -36,7 +36,7 @@ ink_lang = { version = "2.1.0", path = ".." }
 
 trybuild = "1.0.24"
 pretty_assertions = "0.6.1"
-scale-info = { version = "0.2", default-features = false, features = ["derive"] }
+scale-info = { version = "0.3", default-features = false, features = ["derive"] }
 
 [lib]
 name = "ink_lang_macro"
diff --git a/lang/macro/src/codegen/metadata.rs b/lang/macro/src/codegen/metadata.rs
index 0f67e3b89b1..3621ced43d1 100644
--- a/lang/macro/src/codegen/metadata.rs
+++ b/lang/macro/src/codegen/metadata.rs
@@ -242,15 +242,13 @@ impl GenerateMetadata<'_> {
     }
 
     fn generate_contract(&self) -> TokenStream2 {
-        let contract_ident_lit = self.contract.ident.to_string();
-
         let constructors = self.generate_constructors();
         let messages = self.generate_messages();
         let events = self.generate_events();
         let docs = self.generate_docs();
 
         quote! {
-            ::ink_metadata::ContractSpec::new(#contract_ident_lit)
+            ::ink_metadata::ContractSpec::new()
                 .constructors(vec![
                     #(#constructors ,)*
                 ])
diff --git a/metadata/Cargo.toml b/metadata/Cargo.toml
index d609075a490..ac2fc01c23c 100644
--- a/metadata/Cargo.toml
+++ b/metadata/Cargo.toml
@@ -20,11 +20,11 @@ ink_primitives = { version = "2.1.0", path = "../primitives/", default-features
 
 serde = { version = "1.0", default-features = false, features = ["derive", "alloc"] }
 derive_more = { version = "0.99", default-features = false, features = ["from"] }
-scale-info = { version = "0.2", default-features = false, features = ["derive"] }
+scale-info = { version = "0.3", default-features = false, features = ["derive"] }
 
 [dev-dependencies]
+pretty_assertions = "0.6.1"
 serde_json = "1.0"
-assert-json-diff = "1.0.1"
 
 [features]
 default = [
diff --git a/metadata/src/layout2/mod.rs b/metadata/src/layout2/mod.rs
index fe2cdfae8bb..b475a2528d4 100644
--- a/metadata/src/layout2/mod.rs
+++ b/metadata/src/layout2/mod.rs
@@ -300,7 +300,7 @@ pub struct FieldLayout<F: Form = MetaForm> {
     /// The name of the field.
     ///
     /// Can be missing, e.g. in case of an enum tuple struct variant.
-    name: Option<F::String>,
+    name: Option<&'static str>,
     /// The kind of the field.
     ///
     /// This is either a direct layout bound
@@ -312,7 +312,7 @@ impl FieldLayout {
     /// Creates a new field layout.
     pub fn new<N, L>(name: N, layout: L) -> Self
     where
-        N: Into<Option<<MetaForm as Form>::String>>,
+        N: Into<Option<&'static str>>,
         L: Into<Layout>,
     {
         Self {
@@ -327,7 +327,7 @@ impl IntoCompact for FieldLayout {
 
     fn into_compact(self, registry: &mut Registry) -> Self::Output {
         FieldLayout {
-            name: self.name.map(|name| registry.register_string(name)),
+            name: self.name,
             layout: self.layout.into_compact(registry),
         }
     }
diff --git a/metadata/src/layout2/tests.rs b/metadata/src/layout2/tests.rs
index de6b4e2fecc..d4604f8974e 100644
--- a/metadata/src/layout2/tests.rs
+++ b/metadata/src/layout2/tests.rs
@@ -14,6 +14,7 @@
 
 use super::*;
 use ink_primitives::KeyPtr;
+use pretty_assertions::assert_eq;
 
 #[test]
 fn layout_key_works() {
@@ -60,7 +61,7 @@ fn named_fields_work() {
                                 "ty": 1,
                             }
                         },
-                        "name": 1,
+                        "name": "a",
                     },
                     {
                         "layout": {
@@ -73,7 +74,7 @@ fn named_fields_work() {
                                 "ty": 2,
                             }
                         },
-                        "name": 2,
+                        "name": "b",
                     }
                 ]
             }
@@ -293,7 +294,7 @@ fn mixed_enum_work() {
                                         "ty": 1,
                                     }
                                 },
-                                "name": 1,
+                                "name": "a",
                             },
                             {
                                 "layout": {
@@ -306,7 +307,7 @@ fn mixed_enum_work() {
                                         "ty": 2,
                                     }
                                 },
-                                "name": 2,
+                                "name": "b",
                             }
                         ],
                     },
diff --git a/metadata/src/lib.rs b/metadata/src/lib.rs
index d0b1e409688..4106a66b70c 100644
--- a/metadata/src/lib.rs
+++ b/metadata/src/lib.rs
@@ -41,6 +41,7 @@ pub use self::specs::{
     ReturnTypeSpec,
     TypeSpec,
 };
+
 #[cfg(feature = "derive")]
 use scale_info::{
     form::CompactForm,
@@ -49,24 +50,25 @@ use scale_info::{
 };
 use serde::Serialize;
 
-/// An entire ink! project for ABI file generation purposes.
+/// An entire ink! project for metadata file generation purposes.
 #[derive(Debug, Serialize)]
 pub struct InkProject {
+    #[serde(flatten)]
     registry: Registry,
     #[serde(rename = "storage")]
+    /// The layout of the storage data structure
     layout: layout2::Layout<CompactForm>,
-    #[serde(rename = "contract")]
     spec: ContractSpec<CompactForm>,
 }
 
 impl InkProject {
-    /// Creates a new ink! project.
     pub fn new<L, S>(layout: L, spec: S) -> Self
     where
         L: Into<layout2::Layout>,
         S: Into<ContractSpec>,
     {
         let mut registry = Registry::new();
+
         Self {
             layout: layout.into().into_compact(&mut registry),
             spec: spec.into().into_compact(&mut registry),
diff --git a/metadata/src/specs.rs b/metadata/src/specs.rs
index cdd8cdb25cf..3b0c49037dd 100644
--- a/metadata/src/specs.rs
+++ b/metadata/src/specs.rs
@@ -39,8 +39,6 @@ use serde::Serialize;
 #[derive(Debug, PartialEq, Eq, Serialize)]
 #[serde(bound = "F::TypeId: Serialize")]
 pub struct ContractSpec<F: Form = MetaForm> {
-    /// The name of the contract.
-    name: F::String,
     /// The set of constructors of the contract.
     constructors: Vec<ConstructorSpec<F>>,
     /// The external messages of the contract.
@@ -56,7 +54,6 @@ impl IntoCompact for ContractSpec {
 
     fn into_compact(self, registry: &mut Registry) -> Self::Output {
         ContractSpec {
-            name: registry.register_string(&self.name),
             constructors: self
                 .constructors
                 .into_iter()
@@ -171,10 +168,9 @@ impl ContractSpecBuilder<Valid> {
 
 impl ContractSpec {
     /// Creates a new contract specification.
-    pub fn new(name: <MetaForm as Form>::String) -> ContractSpecBuilder {
+    pub fn new() -> ContractSpecBuilder {
         ContractSpecBuilder {
             spec: Self {
-                name,
                 constructors: Vec::new(),
                 messages: Vec::new(),
                 events: Vec::new(),
@@ -190,7 +186,7 @@ impl ContractSpec {
 #[serde(bound = "F::TypeId: Serialize")]
 pub struct ConstructorSpec<F: Form = MetaForm> {
     /// The name of the message.
-    name: F::String,
+    name: &'static str,
     /// The selector hash of the message.
     #[serde(serialize_with = "serialize_as_byte_str")]
     selector: [u8; 4],
@@ -205,7 +201,7 @@ impl IntoCompact for ConstructorSpec {
 
     fn into_compact(self, registry: &mut Registry) -> Self::Output {
         ConstructorSpec {
-            name: registry.register_string(&self.name),
+            name: self.name,
             selector: self.selector,
             args: self
                 .args
@@ -231,9 +227,7 @@ pub struct ConstructorSpecBuilder<Selector> {
 
 impl ConstructorSpec {
     /// Creates a new constructor spec builder.
-    pub fn new(
-        name: <MetaForm as Form>::String,
-    ) -> ConstructorSpecBuilder<Missing<state::Selector>> {
+    pub fn new(name: &'static str) -> ConstructorSpecBuilder<Missing<state::Selector>> {
         ConstructorSpecBuilder {
             spec: Self {
                 name,
@@ -296,7 +290,7 @@ impl ConstructorSpecBuilder<state::Selector> {
 #[serde(rename_all = "camelCase")]
 pub struct MessageSpec<F: Form = MetaForm> {
     /// The name of the message.
-    name: F::String,
+    name: &'static str,
     /// The selector hash of the message.
     #[serde(serialize_with = "serialize_as_byte_str")]
     selector: [u8; 4],
@@ -329,7 +323,7 @@ mod state {
 impl MessageSpec {
     /// Creates a new message spec builder.
     pub fn new(
-        name: <MetaForm as Form>::String,
+        name: &'static str,
     ) -> MessageSpecBuilder<
         Missing<state::Selector>,
         Missing<state::Mutates>,
@@ -443,7 +437,7 @@ impl IntoCompact for MessageSpec {
 
     fn into_compact(self, registry: &mut Registry) -> Self::Output {
         MessageSpec {
-            name: registry.register_string(&self.name),
+            name: self.name,
             selector: self.selector,
             mutates: self.mutates,
             args: self
@@ -462,7 +456,7 @@ impl IntoCompact for MessageSpec {
 #[serde(bound = "F::TypeId: Serialize")]
 pub struct EventSpec<F: Form = MetaForm> {
     /// The name of the event.
-    name: F::String,
+    name: &'static str,
     /// The event arguments.
     args: Vec<EventParamSpec<F>>,
     /// The event documentation.
@@ -508,7 +502,7 @@ impl IntoCompact for EventSpec {
 
     fn into_compact(self, registry: &mut Registry) -> Self::Output {
         EventSpec {
-            name: registry.register_string(&self.name),
+            name: self.name,
             args: self
                 .args
                 .into_iter()
@@ -549,7 +543,7 @@ impl EventSpec {
 /// default setup. Even though it would be useful for third party tools
 /// such as the Polkadot UI to know that we are handling with `Balance`
 /// types, we currently cannot communicate this without display names.
-pub type DisplayName<F> = scale_info::Path<F>;
+pub type DisplayName = scale_info::Path;
 
 /// A type specification.
 ///
@@ -575,7 +569,7 @@ pub struct TypeSpec<F: Form = MetaForm> {
     /// The actual type.
     id: F::TypeId,
     /// The compile-time known displayed representation of the type.
-    display_name: DisplayName<F>,
+    display_name: DisplayName,
 }
 
 impl IntoCompact for TypeSpec {
@@ -584,7 +578,7 @@ impl IntoCompact for TypeSpec {
     fn into_compact(self, registry: &mut Registry) -> Self::Output {
         TypeSpec {
             id: registry.register_type(&self.id),
-            display_name: self.display_name.into_compact(registry),
+            display_name: self.display_name,
         }
     }
 }
@@ -623,7 +617,7 @@ impl TypeSpec {
     pub fn with_name_segs<T, S>(segments: S) -> Self
     where
         T: TypeInfo + 'static,
-        S: IntoIterator<Item = <MetaForm as Form>::String>,
+        S: IntoIterator<Item = &'static str>,
     {
         Self {
             id: meta_type::<T>(),
@@ -649,7 +643,7 @@ impl TypeSpec {
 #[serde(bound = "F::TypeId: Serialize")]
 pub struct EventParamSpec<F: Form = MetaForm> {
     /// The name of the parameter.
-    name: F::String,
+    name: &'static str,
     /// If the event parameter is indexed.
     indexed: bool,
     /// The type of the parameter.
@@ -664,7 +658,7 @@ impl IntoCompact for EventParamSpec {
 
     fn into_compact(self, registry: &mut Registry) -> Self::Output {
         EventParamSpec {
-            name: registry.register_string(self.name),
+            name: self.name,
             indexed: self.indexed,
             ty: self.ty.into_compact(registry),
             docs: self.docs,
@@ -776,7 +770,7 @@ impl ReturnTypeSpec {
 #[serde(bound = "F::TypeId: Serialize")]
 pub struct MessageParamSpec<F: Form = MetaForm> {
     /// The name of the parameter.
-    name: F::String,
+    name: &'static str,
     /// The type of the parameter.
     #[serde(rename = "type")]
     ty: TypeSpec<F>,
@@ -787,7 +781,7 @@ impl IntoCompact for MessageParamSpec {
 
     fn into_compact(self, registry: &mut Registry) -> Self::Output {
         MessageParamSpec {
-            name: registry.register_string(self.name),
+            name: self.name,
             ty: self.ty.into_compact(registry),
         }
     }
diff --git a/metadata/src/tests.rs b/metadata/src/tests.rs
index 3202413b8ff..aa4b6794901 100644
--- a/metadata/src/tests.rs
+++ b/metadata/src/tests.rs
@@ -13,7 +13,7 @@
 // limitations under the License.
 
 use super::*;
-use assert_json_diff::assert_json_eq;
+use pretty_assertions::assert_eq;
 use scale_info::{
     IntoCompact,
     Registry,
@@ -34,10 +34,10 @@ fn spec_constructor_selector_must_serialize_to_hex() {
     let json = serde_json::to_value(&cs.into_compact(&mut registry)).unwrap();
 
     // then
-    assert_json_eq!(
+    assert_eq!(
         json,
         json!({
-            "name": 1,
+            "name": "foo",
             "selector": "0x075bcd15",
             "args": [],
             "docs": []
@@ -48,7 +48,7 @@ fn spec_constructor_selector_must_serialize_to_hex() {
 #[test]
 fn spec_contract_json() {
     // given
-    let contract: ContractSpec = ContractSpec::new("incrementer")
+    let contract: ContractSpec = ContractSpec::new()
         .constructors(vec![
             ConstructorSpec::new("new")
                 .selector([94u8, 189u8, 136u8, 214u8])
@@ -97,30 +97,30 @@ fn spec_contract_json() {
     let json = serde_json::to_value(&contract.into_compact(&mut registry)).unwrap();
 
     // then
-    assert_json_eq!(
+    assert_eq!(
         json,
         json!({
             "constructors": [
                 {
                     "args": [
                         {
-                            "name": 3,
+                            "name": "init_value",
                             "type": {
                                 "displayName": [
-                                    4
+                                    "i32"
                                 ],
                                 "id": 1
                             }
                         }
                     ],
                     "docs": [],
-                    "name": 2,
+                    "name": "new",
                     "selector": "0x5ebd88d6"
                 },
                 {
                     "args": [],
                     "docs": [],
-                    "name": 5,
+                    "name": "default",
                     "selector": "0x0222ff18"
                 }
             ],
@@ -130,10 +130,10 @@ fn spec_contract_json() {
                 {
                     "args": [
                         {
-                            "name": 7,
+                            "name": "by",
                             "type": {
                                 "displayName": [
-                                    4
+                                    "i32"
                                 ],
                                 "id": 1
                             }
@@ -141,7 +141,7 @@ fn spec_contract_json() {
                     ],
                     "docs": [],
                     "mutates": true,
-                    "name": 6,
+                    "name": "inc",
                     "returnType": null,
                     "selector": "0xe7d0590f"
                 },
@@ -149,17 +149,16 @@ fn spec_contract_json() {
                     "args": [],
                     "docs": [],
                     "mutates": false,
-                    "name": 8,
+                    "name": "get",
                     "returnType": {
                         "displayName": [
-                            4
+                            "i32"
                         ],
                         "id": 1
                     },
                     "selector": "0x25444afe"
                 }
             ],
-            "name": 1
         })
     )
 }
diff --git a/primitives/Cargo.toml b/primitives/Cargo.toml
index f8c1d2d5504..68467e3e506 100644
--- a/primitives/Cargo.toml
+++ b/primitives/Cargo.toml
@@ -21,7 +21,7 @@ include = ["/Cargo.toml", "src/**/*.rs", "/README.md", "/LICENSE"]
 ink_prelude = { version = "2.1.0", path = "../prelude/", default-features = false }
 tiny-keccak = { version = "2.0", features = ["keccak"] }
 scale = { package = "parity-scale-codec", version = "1.3", default-features = false, features = ["derive", "full"] }
-scale-info = { version = "0.2", default-features = false, features = ["derive"], optional = true }
+scale-info = { version = "0.3", default-features = false, features = ["derive"], optional = true }
 
 [dev-dependencies]
 criterion = "0.3.1"