diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 86e4551..79a7041 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -34,7 +34,7 @@ jobs:
       matrix:
         include:
           - java: 8
-          - java: 11
+          - java: 17
     steps:
     - uses: actions/setup-java@v5
       with:
diff --git a/build.sbt b/build.sbt
index 14ccbd2..ed943b2 100644
--- a/build.sbt
+++ b/build.sbt
@@ -182,6 +182,14 @@ lazy val plugin = (projectMatrix in file("sbt-conscript"))
           "2.0.0-RC8"
       }
     },
+    scriptedSbt := {
+      scalaBinaryVersion.value match {
+        case "2.12" =>
+          "1.9.9"
+        case _ =>
+          (pluginCrossBuild / sbtVersion).value
+      }
+    },
     buildInfo(packageName = "sbtconscript", v = Dependencies.launcherInterface.revision),
     name := "sbt-conscript",
     scriptedBufferLog := false,