diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 399981178..42bf58e43 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -29,7 +29,7 @@ jobs:
       fail-fast: false
       matrix:
         os: [ubuntu-22.04]
-        scala: [3, 2.12, 2.13]
+        scala: [3.3.8, 2.12.21, 3.9.0]
         java: [temurin@8]
     runs-on: ${{ matrix.os }}
     timeout-minutes: 60
@@ -130,32 +130,32 @@ jobs:
         if: matrix.java == 'temurin@8' && steps.setup-java-temurin-8.outputs.cache-hit == 'false'
         run: sbt +update
 
-      - name: Download target directories (3)
+      - name: Download target directories (3.3.8)
         uses: actions/download-artifact@v6
         with:
-          name: target-${{ matrix.os }}-${{ matrix.java }}-3
+          name: target-${{ matrix.os }}-${{ matrix.java }}-3.3.8
 
-      - name: Inflate target directories (3)
+      - name: Inflate target directories (3.3.8)
         run: |
           tar xf targets.tar
           rm targets.tar
 
-      - name: Download target directories (2.12)
+      - name: Download target directories (2.12.21)
         uses: actions/download-artifact@v6
         with:
-          name: target-${{ matrix.os }}-${{ matrix.java }}-2.12
+          name: target-${{ matrix.os }}-${{ matrix.java }}-2.12.21
 
-      - name: Inflate target directories (2.12)
+      - name: Inflate target directories (2.12.21)
         run: |
           tar xf targets.tar
           rm targets.tar
 
-      - name: Download target directories (2.13)
+      - name: Download target directories (3.9.0)
         uses: actions/download-artifact@v6
         with:
-          name: target-${{ matrix.os }}-${{ matrix.java }}-2.13
+          name: target-${{ matrix.os }}-${{ matrix.java }}-3.9.0
 
-      - name: Inflate target directories (2.13)
+      - name: Inflate target directories (3.9.0)
         run: |
           tar xf targets.tar
           rm targets.tar
@@ -217,7 +217,7 @@ jobs:
       - name: Submit Dependencies
         uses: scalacenter/sbt-dependency-submission@v2
         with:
-          modules-ignore: blaze_3 blaze_2.12 blaze_2.13 blaze-examples_3 blaze-examples_2.12 blaze-examples_2.13 sbt-http4s-org-scalafix-internal_3 sbt-http4s-org-scalafix-internal_2.12 sbt-http4s-org-scalafix-internal_2.13 blaze-testkit_3 blaze-testkit_2.12 blaze-testkit_2.13
+          modules-ignore: blaze_3 blaze_2.12 blaze_3 blaze-examples_3 blaze-examples_2.12 blaze-examples_3 sbt-http4s-org-scalafix-internal_3 sbt-http4s-org-scalafix-internal_2.12 sbt-http4s-org-scalafix-internal_3 blaze-testkit_3 blaze-testkit_2.12 blaze-testkit_3
           configs-ignore: test scala-tool scala-doc-tool test-internal
 
   validate-steward:
diff --git a/build.sbt b/build.sbt
index 9fef4a966..6b7d120c7 100644
--- a/build.sbt
+++ b/build.sbt
@@ -2,7 +2,7 @@ import com.typesafe.tools.mima.core._
 import Dependencies._
 
 val Scala212 = "2.12.21"
-val Scala213 = "2.13.18"
+val Scala213 = "3.9.0"
 val Scala3 = "3.3.8"
 val http4sVersion = "0.23.36"
 val munitCatsEffectVersion = "2.2.0"