diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 0110900..c7d64c7 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -23,7 +23,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest]
-        scala: [2.13.9, 2.12.20]
+        scala: [2.13.15, 2.12.20]
         java: [temurin@8, temurin@11]
     runs-on: ${{ matrix.os }}
     steps:
@@ -73,7 +73,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest]
-        scala: [2.13.9]
+        scala: [2.13.15]
         java: [temurin@8]
     runs-on: ${{ matrix.os }}
     steps:
@@ -101,12 +101,12 @@ jobs:
       - name: Setup sbt
         uses: sbt/setup-sbt@v1
 
-      - name: Download target directories (2.13.9)
+      - name: Download target directories (2.13.15)
         uses: actions/download-artifact@v4
         with:
-          name: target-${{ matrix.os }}-2.13.9-${{ matrix.java }}
+          name: target-${{ matrix.os }}-2.13.15-${{ matrix.java }}
 
-      - name: Inflate target directories (2.13.9)
+      - name: Inflate target directories (2.13.15)
         run: |
           tar xf targets.tar
           rm targets.tar
diff --git a/build.sbt b/build.sbt
index ac86e06..9410ddd 100644
--- a/build.sbt
+++ b/build.sbt
@@ -19,7 +19,7 @@ inThisBuild(List(
       url("https://dwolla.com")
     ),
   ),
-  crossScalaVersions := Seq("2.13.9", "2.12.20"),
+  crossScalaVersions := Seq("2.13.15", "2.12.20"),
   scalaVersion := crossScalaVersions.value.head,
   startYear := Option(2016),
   addCompilerPlugin("org.typelevel" %% "kind-projector" % "0.13.3" cross CrossVersion.full),