diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 311f1da7..d3e283c1 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -28,7 +28,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-22.04]
-        scala: [3.8.3]
+        scala: [3.8.4]
         java: [temurin@25, temurin@17]
         project: [rootJS, rootJVM]
         exclude:
diff --git a/.mergify.yml b/.mergify.yml
index 6955f5e1..4bac75c1 100644
--- a/.mergify.yml
+++ b/.mergify.yml
@@ -13,9 +13,9 @@ pull_request_rules:
     - body~=labels:.*early-semver-patch
     - body~=labels:.*early-semver-minor
     - 'title=flake.lock: Update'
-  - status-success=Test (ubuntu-22.04, 3.8.3, temurin@25, rootJS)
-  - status-success=Test (ubuntu-22.04, 3.8.3, temurin@25, rootJVM)
-  - status-success=Test (ubuntu-22.04, 3.8.3, temurin@17, rootJVM)
+  - status-success=Test (ubuntu-22.04, 3.8.4, temurin@25, rootJS)
+  - status-success=Test (ubuntu-22.04, 3.8.4, temurin@25, rootJVM)
+  - status-success=Test (ubuntu-22.04, 3.8.4, temurin@17, rootJVM)
   actions:
     merge: {}
 - name: Label core PRs
diff --git a/build.sbt b/build.sbt
index b5ace390..b576b674 100644
--- a/build.sbt
+++ b/build.sbt
@@ -3,9 +3,9 @@ lazy val V = _root_.scalafix.sbt.BuildInfo
 ThisBuild / tlBaseVersion               := "0.53"
 ThisBuild / tlJdkRelease                := Some(17)
 ThisBuild / githubWorkflowJavaVersions  := Seq("25", "17").map(JavaSpec.temurin(_))
-ThisBuild / scalaVersion                := "3.8.3"
-ThisBuild / crossScalaVersions          := Seq("3.8.3")
-ThisBuild / githubWorkflowScalaVersions := Seq("3.8.3")
+ThisBuild / scalaVersion                := "3.8.4"
+ThisBuild / crossScalaVersions          := Seq("3.8.4")
+ThisBuild / githubWorkflowScalaVersions := Seq("3.8.4")
 Global / onChangedBuildSource           := ReloadOnSourceChanges
 
 lazy val root = tlCrossRootProject