diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index f93acaa..7fbc9b3 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -28,7 +28,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest]
-        scala: [2.12.17, 2.13.10]
+        scala: [2.12.17, 2.13.15]
         java: [temurin@8]
     runs-on: ${{ matrix.os }}
     steps:
@@ -95,7 +95,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest]
-        scala: [2.13.10]
+        scala: [2.13.15]
         java: [temurin@8]
     runs-on: ${{ matrix.os }}
     steps:
@@ -142,12 +142,12 @@ jobs:
           tar xf targets.tar
           rm targets.tar
 
-      - name: Download target directories (2.13.10)
+      - name: Download target directories (2.13.15)
         uses: actions/download-artifact@v2
         with:
-          name: target-${{ matrix.os }}-${{ matrix.java }}-2.13.10
+          name: target-${{ matrix.os }}-${{ matrix.java }}-2.13.15
 
-      - name: Inflate target directories (2.13.10)
+      - name: Inflate target directories (2.13.15)
         run: |
           tar xf targets.tar
           rm targets.tar
diff --git a/build.sbt b/build.sbt
index 760a470..f94a38f 100644
--- a/build.sbt
+++ b/build.sbt
@@ -9,7 +9,7 @@ ThisBuild / tlCiHeaderCheck := false
 val catsEffectVersion = "2.5.5"
 val catsEffect3Version = "3.4.3"
 
-ThisBuild / crossScalaVersions := Seq("2.12.17", "2.13.10")
+ThisBuild / crossScalaVersions := Seq("2.12.17", "2.13.15")
 
 ThisBuild / libraryDependencySchemes ++= Seq(
   // scoverage depends on scala-xml 1, but discipline-scalatest transitively pulls in scala-xml 2