diff --git a/src/accounts.rs b/src/accounts.rs
index 79cab660b..5ea6965e0 100644
--- a/src/accounts.rs
+++ b/src/accounts.rs
@@ -363,7 +363,8 @@ impl Config {
     pub async fn from_file(file: PathBuf) -> Result<Self> {
         let dir = file.parent().context("can't get config file directory")?;
         let bytes = fs::read(&file).await.context("failed to read file")?;
-        let mut inner: InnerConfig = toml::from_slice(&bytes).context("failed to parse config")?;
+        let s = std::str::from_utf8(&bytes)?;
+        let mut inner: InnerConfig = toml::from_str(s).context("failed to parse config")?;
 
         // Previous versions of the core stored absolute paths in account config.
         // Convert them to relative paths.
diff --git a/src/webxdc.rs b/src/webxdc.rs
index 1413b8789..eabb0684f 100644
--- a/src/webxdc.rs
+++ b/src/webxdc.rs
@@ -640,7 +640,8 @@ impl Context {
 }
 
 fn parse_webxdc_manifest(bytes: &[u8]) -> Result<WebxdcManifest> {
-    let manifest: WebxdcManifest = toml::from_slice(bytes)?;
+    let s = std::str::from_utf8(bytes)?;
+    let manifest: WebxdcManifest = toml::from_str(s)?;
     Ok(manifest)
 }