diff --git a/.github/workflows/issue_pr_lock.yml b/.github/workflows/issue_pr_lock.yml
index b379bd8339..6bc907d688 100644
--- a/.github/workflows/issue_pr_lock.yml
+++ b/.github/workflows/issue_pr_lock.yml
@@ -74,7 +74,7 @@ jobs:
           log-output: true
       - if: failure()
         name: Send job failure notification e-mail
-        uses: dawidd6/action-send-mail@42942bc2f8fba4e611b459a018967a6a7c78c68c # v17
+        uses: dawidd6/action-send-mail@94de994a9f6fffee200243214e17002e2920bb59 # v18
         with:
           server_address: ${{secrets.ACTION_MAIL_SERVER}}
           server_port: 465
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 50a9dc760f..142d7652a9 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -196,7 +196,7 @@ jobs:
         run: cat email_body.txt
       - name: Send release notification e-mail
         # Ref: https://github.com/dawidd6/action-send-mail
-        uses: dawidd6/action-send-mail@42942bc2f8fba4e611b459a018967a6a7c78c68c # v17
+        uses: dawidd6/action-send-mail@94de994a9f6fffee200243214e17002e2920bb59 # v18
         with:
           server_address: ${{secrets.ACTION_MAIL_SERVER}}
           server_port: 465