diff --git a/Cargo.toml b/Cargo.toml
index b495f719..4ddcd654 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -56,7 +56,7 @@ serde_json = { version = "1.0.60", default-features = false, features = [
     "alloc",
 ] }
 smallstr = { version = "0.3.0", default-features = false }
-snafu = { version = "0.7.0", default-features = false }
+snafu = { version = "0.8.0", default-features = false }
 unicase = "2.6.0"
 
 # std
@@ -83,7 +83,7 @@ tiny-skia = { version = "0.11.1", default-features = false, features = [
 tiny-skia-path = { version = "0.11.1", default-features = false, optional = true }
 
 # Networking
-splits-io-api = { version = "0.3.0", optional = true }
+splits-io-api = { version = "0.4.0", optional = true }
 
 # Auto Splitting
 livesplit-auto-splitting = { path = "crates/livesplit-auto-splitting", version = "0.1.0", optional = true }
diff --git a/crates/livesplit-auto-splitting/Cargo.toml b/crates/livesplit-auto-splitting/Cargo.toml
index bfe2787f..b0cfab70 100644
--- a/crates/livesplit-auto-splitting/Cargo.toml
+++ b/crates/livesplit-auto-splitting/Cargo.toml
@@ -18,7 +18,7 @@ indexmap = "2.0.2"
 proc-maps = { version = "0.3.0", default-features = false }
 read-process-memory = { version = "0.1.4", default-features = false }
 slotmap = { version = "1.0.2", default-features = false }
-snafu = "0.7.0"
+snafu = "0.8.0"
 sysinfo = { version = "0.30.0", default-features = false, features = [
   "multithread",
 ] }
diff --git a/src/networking/splits_io.rs b/src/networking/splits_io.rs
index 7905aed6..b00e017a 100644
--- a/src/networking/splits_io.rs
+++ b/src/networking/splits_io.rs
@@ -10,9 +10,9 @@ use crate::{
     },
     Run, Timer,
 };
-use snafu::ResultExt;
+use snafu::{OptionExt, ResultExt};
 
-pub use api::{run::UploadedRun, Client, Error as UploadError};
+pub use api::{run::UploadedRun, Client, Error as ApiError};
 pub use splits_io_api as api;
 
 /// Describes an error that happened when downloading a run from Splits.io. This
@@ -33,6 +33,21 @@ pub enum DownloadError {
     },
 }
 
+/// Describes an error that happened when uploading a run to Splits.io. This may
+/// either be because the upload itself had a problem or because the run itself
+/// couldn't be saved.
+#[derive(Debug, snafu::Snafu)]
+#[snafu(context(suffix(false)))]
+pub enum UploadError {
+    /// Failed to upload the run.
+    Upload {
+        /// The underlying upload error.
+        source: api::Error,
+    },
+    /// Failed to save the run.
+    Save,
+}
+
 /// Asynchronously downloads a run from Splits.io based on its Splits.io ID. The
 /// run automatically gets parsed into a Run object.
 pub async fn download_run(
@@ -48,10 +63,11 @@ pub async fn download_run(
 /// the uploaded run and its claim token gets returned when the run was
 /// successfully uploaded.
 pub async fn upload_run(client: &Client, run: &Run) -> Result<UploadedRun, UploadError> {
-    api::run::upload_lazy(client, |writer| {
-        saver::livesplit::save_run(run, IoWrite(writer))
-    })
-    .await
+    let mut buf = Vec::new();
+    saver::livesplit::save_run(run, IoWrite(&mut buf))
+        .ok()
+        .context(Save)?;
+    api::run::upload(client, buf).await.context(Upload)
 }
 
 /// Asynchronously uploads the run of the timer provided to Splits.io. If there
@@ -59,8 +75,9 @@ pub async fn upload_run(client: &Client, run: &Run) -> Result<UploadedRun, Uploa
 /// object representing the ID of the uploaded run and its claim token gets
 /// returned when the run was successfully uploaded.
 pub async fn upload_timer(client: &Client, timer: &Timer) -> Result<UploadedRun, UploadError> {
-    api::run::upload_lazy(client, |writer| {
-        saver::livesplit::save_timer(timer, IoWrite(writer))
-    })
-    .await
+    let mut buf = Vec::new();
+    saver::livesplit::save_timer(timer, IoWrite(&mut buf))
+        .ok()
+        .context(Save)?;
+    api::run::upload(client, buf).await.context(Upload)
 }
diff --git a/src/platform/mod.rs b/src/platform/mod.rs
index 6c7af1a8..7130c51d 100644
--- a/src/platform/mod.rs
+++ b/src/platform/mod.rs
@@ -30,6 +30,7 @@ pub mod math;
 pub use std::path;
 
 #[cfg(not(feature = "std"))]
+#[allow(unused)]
 pub mod path {
     pub use alloc::string::String as PathBuf;
     pub use str as Path;
diff --git a/src/platform/wasm/unknown/mod.rs b/src/platform/wasm/unknown/mod.rs
index e848ff91..1a4f81b3 100644
--- a/src/platform/wasm/unknown/mod.rs
+++ b/src/platform/wasm/unknown/mod.rs
@@ -1,4 +1,5 @@
 mod time;
 
 pub use self::time::*;
+#[allow(unused)]
 pub use std::sync::RwLock;
diff --git a/src/platform/wasm/web/mod.rs b/src/platform/wasm/web/mod.rs
index ff439fae..a0a8a223 100644
--- a/src/platform/wasm/web/mod.rs
+++ b/src/platform/wasm/web/mod.rs
@@ -1,3 +1,4 @@
 mod time;
 pub use self::time::*;
+#[allow(unused)]
 pub use std::sync::RwLock;