diff --git a/.github/workflows/build-crystal-containers.yml b/.github/workflows/build-crystal-containers.yml
index da99223..30e620e 100644
--- a/.github/workflows/build-crystal-containers.yml
+++ b/.github/workflows/build-crystal-containers.yml
@@ -18,21 +18,21 @@ jobs:
         # based on https://github.com/84codes/crystal-container-images
         crystal:
           # stable release version
-          - version: 1.14.1
+          - version: 1.15.1
             shards: 0.19.1
             alpine: '3.20'
             libgc: 8.2.6
             llvm: 18
             tag: latest
           # release candidate, builds should target compatibility
-          - version: 1.14.1
+          - version: 1.15.1
             shards: 0.19.1
             alpine: '3.20'
             libgc: 8.2.6
             llvm: 18
             tag: unstable
           # latest version with unknown side effects
-          - version: 1.14.1
+          - version: 1.15.1
             shards: 0.19.1
             alpine: '3.20'
             libgc: 8.2.6
diff --git a/.github/workflows/crystal-style.yml b/.github/workflows/crystal-style.yml
index 10dfb10..fa88735 100644
--- a/.github/workflows/crystal-style.yml
+++ b/.github/workflows/crystal-style.yml
@@ -13,7 +13,7 @@ jobs:
       - name: Format
         run: crystal tool format --check
       - name: Lint
-        uses: crystal-ameba/github-action@v0.9.0
+        uses: crystal-ameba/github-action@v0.12.0
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}