diff --git a/Cargo.toml b/Cargo.toml
index 8f90fd58..a7df99b2 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "ibapi"
-version = "0.4.3"
+version = "0.5.0"
 edition = "2021"
 authors = ["Wil Boayue <wil@wsbsolutions.com>"]
 description = "A synchronous implementation of the Interactive Brokers TWS API."
diff --git a/contributors/README.md b/contributors/README.md
index 0230f05b..6429f253 100644
--- a/contributors/README.md
+++ b/contributors/README.md
@@ -13,3 +13,29 @@ RUST_LOG=debug cargo run --bin find_contract_details
 
 `RUST_LOG=debug`
 `IBAPI_RECORDING_DIR=/tmp`
+
+## Creating and publishing releases.
+
+1. Make sure build is clean and tests are passing.
+
+```bash
+cargo build --all-targets
+cargo test
+```
+
+2. Update version number in [Cargo.toml](https://github.com/wboayue/rust-ibapi/blob/76033d170f2b87d55ed2cd96fef17bf124161d5f/Cargo.toml#L3) using [semantic versioning](https://semver.org/). Commit and push.
+
+3. Create tag with new version number and push.
+
+```bash
+git tag v0.4.0 main
+git push origin tag v0.4.0
+```
+
+4. [Create release](https://github.com/wboayue/rust-ibapi/releases/new) pointing to new tag.  Describe changes in release.
+
+5. Publish to crates.io
+
+```bash
+cargo publish
+```
\ No newline at end of file
diff --git a/examples/tick_by_tick.rs b/examples/tick_by_tick.rs
index 68793578..97f775dc 100644
--- a/examples/tick_by_tick.rs
+++ b/examples/tick_by_tick.rs
@@ -42,7 +42,7 @@ fn main() {
     thread::sleep(Duration::from_secs(5));
 }
 
-fn stream_last(client: &mut Client, symbol: &str) -> anyhow::Result<()> {
+fn stream_last(client: &mut Client, _symbol: &str) -> anyhow::Result<()> {
     let contract = contract_gc();
     let ticks = client.tick_by_tick_last(&contract, 0, false)?;
 
@@ -87,7 +87,7 @@ fn stream_all_last(client: &Client, symbol: &str) -> anyhow::Result<()> {
     Ok(())
 }
 
-fn stream_bid_ask(client: &mut Client, symbol: &str) -> anyhow::Result<()> {
+fn stream_bid_ask(client: &mut Client, _symbol: &str) -> anyhow::Result<()> {
     let contract = contract_es();
     let ticks = client.tick_by_tick_bid_ask(&contract, 0, false)?;
 
@@ -98,7 +98,7 @@ fn stream_bid_ask(client: &mut Client, symbol: &str) -> anyhow::Result<()> {
     Ok(())
 }
 
-fn stream_mid_point(client: &mut Client, symbol: &str) -> anyhow::Result<()> {
+fn stream_mid_point(client: &mut Client, _symbol: &str) -> anyhow::Result<()> {
     let contract = contract_es();
     let ticks = client.tick_by_tick_midpoint(&contract, 0, false)?;
 
diff --git a/src/contracts/encoders.rs b/src/contracts/encoders.rs
index 8ceed697..f51c4c74 100644
--- a/src/contracts/encoders.rs
+++ b/src/contracts/encoders.rs
@@ -81,7 +81,6 @@ pub(crate) fn request_market_rule(market_rule_id: i32) -> Result<RequestMessage,
 
 #[cfg(test)]
 mod tests {
-    use super::*;
 
     #[test]
     fn request_market_rule() {
diff --git a/src/contracts/tests.rs b/src/contracts/tests.rs
index 6b3146b7..813bf26b 100644
--- a/src/contracts/tests.rs
+++ b/src/contracts/tests.rs
@@ -16,7 +16,7 @@ fn request_stock_contract_details() {
         ]
     }));
 
-    let mut client = Client::stubbed(message_bus, server_versions::SIZE_RULES);
+    let client = Client::stubbed(message_bus, server_versions::SIZE_RULES);
 
     let contract = Contract::stock("TSLA");