diff --git a/.github/actions/test-charts/action.yml b/.github/actions/test-charts/action.yml
index da615b9a..6fc1f523 100644
--- a/.github/actions/test-charts/action.yml
+++ b/.github/actions/test-charts/action.yml
@@ -43,10 +43,11 @@ runs:
       with:
         python-version: 3.14
 
+    # TODO: switch back to a tagged release once chart-testing-action cuts one that supports ct v3.15.0
     - name: Set up chart-testing
-      uses: helm/chart-testing-action@6ec842c01de15ebb84c8627d2744a0c2f2755c9f # v2.8.0
+      uses: helm/chart-testing-action@4b9e8ccd8d870c94667aec5e4ef54cc49934cd85 # main (post-v2.8.0)
       with:
-        version: '3.14.0'
+        version: '3.15.0'
         yamllint_version: '1.37.1'
         yamale_version: '6.0.0'
 
diff --git a/.github/workflows/lint.yaml b/.github/workflows/lint.yaml
index cb5be12d..992dec08 100644
--- a/.github/workflows/lint.yaml
+++ b/.github/workflows/lint.yaml
@@ -33,10 +33,11 @@ jobs:
         with:
           python-version: 3.14
 
+      # TODO: switch back to a tagged release once chart-testing-action cuts one that supports ct v3.15.0
       - name: Set up chart-testing
-        uses: helm/chart-testing-action@6ec842c01de15ebb84c8627d2744a0c2f2755c9f # v2.8.0
+        uses: helm/chart-testing-action@4b9e8ccd8d870c94667aec5e4ef54cc49934cd85 # main (post-v2.8.0)
         with:
-          version: '3.14.0'
+          version: '3.15.0'
           yamllint_version: '1.37.1'
           yamale_version: '6.0.0'