diff --git a/.github/workflows/api-breakage.yml b/.github/workflows/api-breakage.yml
index bf82786..f1b8f3f 100644
--- a/.github/workflows/api-breakage.yml
+++ b/.github/workflows/api-breakage.yml
@@ -8,7 +8,7 @@ jobs:
   linux:
     runs-on: ubuntu-latest
     container:
-      image: swift:5.7
+      image: swift:5.8
     steps:
     - name: Checkout
       uses: actions/checkout@v3
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 3c4fe84..0ec32e2 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -39,9 +39,9 @@ jobs:
     strategy:
       matrix:
         image:
-          - 'swift:5.5'
           - 'swift:5.6'
           - 'swift:5.7'
+          - 'swift:5.8'
     
     container:
       image: ${{ matrix.image }}