diff --git a/CHANGELOG.md b/CHANGELOG.md
index b7720543..9173d08e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -10,6 +10,12 @@ Versioning](https://semver.org/spec/v2.0.0.html).
 
 ### yabridgectl
 
+- Fixed regression where the configuration file failed to parse after running
+  `yabridgectl sync` caused by
+  [alexcrichton/toml-rs#256](https://github.com/alexcrichton/toml-rs/issues/256)
+  4.0. If you have already run `yabridgectl sync` under yabridge 1.4.0, then
+  you'll have to manually remove the `[last_known_config]` section from
+  `~/.config/yabridgectl/config.toml`.
 - Fixed issue with overwriting broken symlinks during `yabridgectl sync`.
 
 ## [1.4.0] - 2020-07-26
diff --git a/tools/yabridgectl/src/config.rs b/tools/yabridgectl/src/config.rs
index 8f56ed10..bb8829e3 100644
--- a/tools/yabridgectl/src/config.rs
+++ b/tools/yabridgectl/src/config.rs
@@ -108,7 +108,13 @@ pub struct KnownConfig {
     /// The results from running the contents of `yabridge-host.exe.so` through
     /// [`DefaultHasher`](std::collections::hash_map::DefaultHasher). Hash collisions aren't really
     /// an issue here since we mostly care about the version of Wine.
-    pub yabridge_host_hash: u64,
+    ///
+    /// This should have been stored as a `u64`, but the TOML library parses all integers as signed
+    /// so even though it will be able to serialize all values correctly some values will fail to
+    /// parse:
+    ///
+    /// https://github.com/alexcrichton/toml-rs/issues/256
+    pub yabridge_host_hash: i64,
 }
 
 impl Config {
diff --git a/tools/yabridgectl/src/utils.rs b/tools/yabridgectl/src/utils.rs
index 5e02b3ac..12880112 100644
--- a/tools/yabridgectl/src/utils.rs
+++ b/tools/yabridgectl/src/utils.rs
@@ -183,7 +183,7 @@ pub fn verify_wine_setup(config: &mut Config) -> Result<()> {
             yabridge_host_exe_so_path.display()
         )
     })?);
-    let yabridge_host_hash = hasher.finish();
+    let yabridge_host_hash = hasher.finish() as i64;
 
     // Since these checks can take over a second if wineserver isn't already running we'll only
     // perform them when something has changed