diff --git a/cli/README.md b/cli/README.md
index ce7fdadc688..c282dbf01df 100644
--- a/cli/README.md
+++ b/cli/README.md
@@ -7,10 +7,10 @@ USAGE:
 subxt <SUBCOMMAND>
 
 FLAGS:
--h, --help       
+-h, --help
 Prints help information
 
-    -V, --version    
+    -V, --version
             Prints version information
 
 
@@ -37,9 +37,9 @@ OPTIONS:
 
 ## Codegen
 
-Use to invoke the `subxt-codegen` crate which is used by `subxt-macro` to generate the the runtime API and types. Useful
-for troubleshooting codegen as an alternative to `cargo expand`, and also provides the possibility of customizing the 
-generated code if the macro does not produce the desired API. e.g. 
+Use to invoke the `subxt-codegen` crate which is used by `subxt-macro` to generate the runtime API and types. Useful
+for troubleshooting codegen as an alternative to `cargo expand`, and also provides the possibility to customize the
+generated code if the macro does not produce the desired API. e.g.
 
 `subxt codegen | rustfmt --edition=2018 --emit=stdout`
 
@@ -48,10 +48,10 @@ USAGE:
     subxt codegen [OPTIONS]
 
 OPTIONS:
-    -f, --file <file>    
+    -f, --file <file>
             the path to the encoded metadata file
 
-        --url <url>      
+        --url <url>
             the url of the substrate node to query for metadata for codegen
 
 ```
diff --git a/examples/examples/custom_type_derives.rs b/examples/examples/custom_type_derives.rs
index 5c071be250d..12527de5d8a 100644
--- a/examples/examples/custom_type_derives.rs
+++ b/examples/examples/custom_type_derives.rs
@@ -22,9 +22,9 @@
     runtime_metadata_path = "examples/polkadot_metadata.scale",
     // We can add (certain) custom derives to the generated types by providing
     // a comma separated list to the below attribute. Most useful for adding `Clone`.
-    // The derives that we can add ultiamtely is limited to the traits that the base
+    // The derives that we can add ultimately is limited to the traits that the base
     // types relied upon by the codegen implement.
-    generated_type_derives = "Clone, PartialEq"
+    generated_type_derives = "Clone, PartialEq, Hash"
 )]
 pub mod polkadot {}
 
diff --git a/subxt/src/lib.rs b/subxt/src/lib.rs
index cf8890fe815..21a0cfd4944 100644
--- a/subxt/src/lib.rs
+++ b/subxt/src/lib.rs
@@ -180,7 +180,8 @@ pub enum Phase {
     Clone(bound = ""),
     PartialEq(bound = ""),
     Eq(bound = ""),
-    Default(bound = "")
+    Default(bound = ""),
+    Hash(bound = "")
 )]
 pub struct WrapperKeepOpaque<T> {
     data: Vec<u8>,
@@ -223,7 +224,8 @@ impl<T: Decode> WrapperKeepOpaque<T> {
     PartialEq(bound = ""),
     Debug(bound = ""),
     Eq(bound = ""),
-    Default(bound = "")
+    Default(bound = ""),
+    Hash(bound = "")
 )]
 #[scale_info(skip_type_params(T))]
 #[doc(hidden)]
diff --git a/subxt/tests/integration/codegen/mod.rs b/subxt/tests/integration/codegen/mod.rs
index 0c4beca5894..4f35f5d3e95 100644
--- a/subxt/tests/integration/codegen/mod.rs
+++ b/subxt/tests/integration/codegen/mod.rs
@@ -20,7 +20,7 @@
 /// Generate by:
 ///
 /// - run `polkadot --dev --tmp` node locally
-/// - `cargo run --release -p subxt-cli -- codegen | rustfmt --edition=2018 --emit=stdout > tests/integration/codegen/polkadot.rs`
+/// - `cargo run --release -p subxt-cli -- codegen | rustfmt > subxt/tests/integration/codegen/polkadot.rs`
 #[rustfmt::skip]
 #[allow(clippy::all)]
 mod polkadot;