diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 5077793..9fa4ada 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -22,7 +22,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest]
-        scala: [2.12.14, 2.13.6]
+        scala: [2.12.14, 2.13.15]
         java: [adopt@1.8]
     runs-on: ${{ matrix.os }}
     steps:
diff --git a/build.sbt b/build.sbt
index f3c4b5c..9008e95 100644
--- a/build.sbt
+++ b/build.sbt
@@ -1,6 +1,6 @@
 import ReleaseTransformations._
 
-ThisBuild / crossScalaVersions := Seq("2.12.14", "2.13.6")
+ThisBuild / crossScalaVersions := Seq("2.12.14", "2.13.15")
 ThisBuild / scalaVersion := crossScalaVersions.value.last
 ThisBuild / githubWorkflowJavaVersions := Seq("adopt@1.8")
 ThisBuild / githubWorkflowPublishTargetBranches := Nil