diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 5e9eee39..76260360 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -23,7 +23,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest]
-        scala: [2.12.18]
+        scala: [2.12.19]
         java: [temurin@11, temurin@17]
     runs-on: ${{ matrix.os }}
     steps:
@@ -70,7 +70,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest]
-        scala: [2.12.18]
+        scala: [2.12.19]
         java: [temurin@11]
     runs-on: ${{ matrix.os }}
     steps:
@@ -95,12 +95,12 @@ jobs:
           java-version: 17
           cache: sbt
 
-      - name: Download target directories (2.12.18)
+      - name: Download target directories (2.12.19)
         uses: actions/download-artifact@v4
         with:
-          name: target-${{ matrix.os }}-2.12.18-${{ matrix.java }}
+          name: target-${{ matrix.os }}-2.12.19-${{ matrix.java }}
 
-      - name: Inflate target directories (2.12.18)
+      - name: Inflate target directories (2.12.19)
         run: |
           tar xf targets.tar
           rm targets.tar
diff --git a/project/Common.scala b/project/Common.scala
index 386cddfe..adb77d27 100644
--- a/project/Common.scala
+++ b/project/Common.scala
@@ -29,7 +29,7 @@ object Common extends AutoPlugin {
   override def requires = plugins.JvmPlugin && HeaderPlugin
 
   override def buildSettings = Seq(
-    scalaVersion := "2.12.18"
+    scalaVersion := "2.12.19"
   )
 
   // AutomateHeaderPlugin is not an allRequirements-AutoPlugin, so explicitly add settings here:
diff --git a/project/plugins.sbt b/project/plugins.sbt
index 770c621d..a338b216 100644
--- a/project/plugins.sbt
+++ b/project/plugins.sbt
@@ -28,7 +28,7 @@ lazy val metaroot = (project in file(".")).dependsOn(metaThemePlugin)
 lazy val metaThemePlugin = (project in file("theme-plugin"))
   .settings(
     sbtPlugin    := true,
-    scalaVersion := "2.12.18",
+    scalaVersion := "2.12.19",
     addSbtPlugin("com.github.sbt" % "sbt-web" % "1.5.5"),
     Compile / unmanagedSourceDirectories :=
       mirrorScalaSource((ThisBuild / baseDirectory).value.getParentFile / "theme-plugin")