diff --git a/build.sbt b/build.sbt
index ecb14dc..dd26643 100644
--- a/build.sbt
+++ b/build.sbt
@@ -7,7 +7,7 @@ def isJDK9Plus = jdkMajorVersion >= 9
 
 inThisBuild {
   Seq(
-    scalaVersion      := "2.12.17",
+    scalaVersion      := "2.12.20",
     organization      := "io.laserdisc",
     homepage          := Some(url("https://github.com/laserdisc-io/eisner")),
     licenses += "MIT" -> url("http://opensource.org/licenses/MIT"),
diff --git a/plugin/src/sbt-test/sbt-eisner/auto-field/build.sbt b/plugin/src/sbt-test/sbt-eisner/auto-field/build.sbt
index 059c10b..a24b09c 100644
--- a/plugin/src/sbt-test/sbt-eisner/auto-field/build.sbt
+++ b/plugin/src/sbt-test/sbt-eisner/auto-field/build.sbt
@@ -1,4 +1,4 @@
-scalaVersion := "2.12.17"
+scalaVersion := "2.12.20"
 
 libraryDependencies ++= Seq(
   "org.apache.kafka" % "kafka-streams" % "3.2.2"
diff --git a/plugin/src/sbt-test/sbt-eisner/auto-fun0field/build.sbt b/plugin/src/sbt-test/sbt-eisner/auto-fun0field/build.sbt
index 059c10b..a24b09c 100644
--- a/plugin/src/sbt-test/sbt-eisner/auto-fun0field/build.sbt
+++ b/plugin/src/sbt-test/sbt-eisner/auto-fun0field/build.sbt
@@ -1,4 +1,4 @@
-scalaVersion := "2.12.17"
+scalaVersion := "2.12.20"
 
 libraryDependencies ++= Seq(
   "org.apache.kafka" % "kafka-streams" % "3.2.2"
diff --git a/plugin/src/sbt-test/sbt-eisner/auto-fun0method/build.sbt b/plugin/src/sbt-test/sbt-eisner/auto-fun0method/build.sbt
index 059c10b..a24b09c 100644
--- a/plugin/src/sbt-test/sbt-eisner/auto-fun0method/build.sbt
+++ b/plugin/src/sbt-test/sbt-eisner/auto-fun0method/build.sbt
@@ -1,4 +1,4 @@
-scalaVersion := "2.12.17"
+scalaVersion := "2.12.20"
 
 libraryDependencies ++= Seq(
   "org.apache.kafka" % "kafka-streams" % "3.2.2"
diff --git a/plugin/src/sbt-test/sbt-eisner/auto-inheritance/build.sbt b/plugin/src/sbt-test/sbt-eisner/auto-inheritance/build.sbt
index 059c10b..a24b09c 100644
--- a/plugin/src/sbt-test/sbt-eisner/auto-inheritance/build.sbt
+++ b/plugin/src/sbt-test/sbt-eisner/auto-inheritance/build.sbt
@@ -1,4 +1,4 @@
-scalaVersion := "2.12.17"
+scalaVersion := "2.12.20"
 
 libraryDependencies ++= Seq(
   "org.apache.kafka" % "kafka-streams" % "3.2.2"
diff --git a/plugin/src/sbt-test/sbt-eisner/auto-method/build.sbt b/plugin/src/sbt-test/sbt-eisner/auto-method/build.sbt
index 059c10b..a24b09c 100644
--- a/plugin/src/sbt-test/sbt-eisner/auto-method/build.sbt
+++ b/plugin/src/sbt-test/sbt-eisner/auto-method/build.sbt
@@ -1,4 +1,4 @@
-scalaVersion := "2.12.17"
+scalaVersion := "2.12.20"
 
 libraryDependencies ++= Seq(
   "org.apache.kafka" % "kafka-streams" % "3.2.2"
diff --git a/plugin/src/sbt-test/sbt-eisner/auto-supplierfield/build.sbt b/plugin/src/sbt-test/sbt-eisner/auto-supplierfield/build.sbt
index 059c10b..a24b09c 100644
--- a/plugin/src/sbt-test/sbt-eisner/auto-supplierfield/build.sbt
+++ b/plugin/src/sbt-test/sbt-eisner/auto-supplierfield/build.sbt
@@ -1,4 +1,4 @@
-scalaVersion := "2.12.17"
+scalaVersion := "2.12.20"
 
 libraryDependencies ++= Seq(
   "org.apache.kafka" % "kafka-streams" % "3.2.2"
diff --git a/plugin/src/sbt-test/sbt-eisner/auto-suppliermethod/build.sbt b/plugin/src/sbt-test/sbt-eisner/auto-suppliermethod/build.sbt
index 059c10b..a24b09c 100644
--- a/plugin/src/sbt-test/sbt-eisner/auto-suppliermethod/build.sbt
+++ b/plugin/src/sbt-test/sbt-eisner/auto-suppliermethod/build.sbt
@@ -1,4 +1,4 @@
-scalaVersion := "2.12.17"
+scalaVersion := "2.12.20"
 
 libraryDependencies ++= Seq(
   "org.apache.kafka" % "kafka-streams" % "3.2.2"
diff --git a/plugin/src/sbt-test/sbt-eisner/empty/build.sbt b/plugin/src/sbt-test/sbt-eisner/empty/build.sbt
index 059c10b..a24b09c 100644
--- a/plugin/src/sbt-test/sbt-eisner/empty/build.sbt
+++ b/plugin/src/sbt-test/sbt-eisner/empty/build.sbt
@@ -1,4 +1,4 @@
-scalaVersion := "2.12.17"
+scalaVersion := "2.12.20"
 
 libraryDependencies ++= Seq(
   "org.apache.kafka" % "kafka-streams" % "3.2.2"
diff --git a/plugin/src/sbt-test/sbt-eisner/explicit-inheritance/build.sbt b/plugin/src/sbt-test/sbt-eisner/explicit-inheritance/build.sbt
index e2019fb..28526cb 100644
--- a/plugin/src/sbt-test/sbt-eisner/explicit-inheritance/build.sbt
+++ b/plugin/src/sbt-test/sbt-eisner/explicit-inheritance/build.sbt
@@ -1,4 +1,4 @@
-scalaVersion := "2.12.17"
+scalaVersion := "2.12.20"
 
 libraryDependencies ++= Seq(
   "org.apache.kafka" % "kafka-streams" % "3.2.2"
diff --git a/plugin/src/sbt-test/sbt-eisner/snippet/build.sbt b/plugin/src/sbt-test/sbt-eisner/snippet/build.sbt
index 85c3995..99a5ee4 100644
--- a/plugin/src/sbt-test/sbt-eisner/snippet/build.sbt
+++ b/plugin/src/sbt-test/sbt-eisner/snippet/build.sbt
@@ -1,4 +1,4 @@
-scalaVersion := "2.12.17"
+scalaVersion := "2.12.20"
 
 libraryDependencies ++= Seq(
   "org.apache.kafka" % "kafka-streams" % "3.2.2"