diff --git a/.github/workflows/publish-chart.yaml b/.github/workflows/publish-chart.yaml
index 2a04a5a..2fd4999 100644
--- a/.github/workflows/publish-chart.yaml
+++ b/.github/workflows/publish-chart.yaml
@@ -14,7 +14,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Harden Runner
-        uses: step-security/harden-runner@9af89fc71515a100421586dfdb3dc9c984fbf411 # v2.19.4
+        uses: step-security/harden-runner@bf7454d06d71f1098171f2acdf0cd4708d7b5920 # v2.20.0
         with:
           egress-policy: audit
 
diff --git a/.github/workflows/semgrep.yaml b/.github/workflows/semgrep.yaml
index 43f9f72..f2e5a39 100644
--- a/.github/workflows/semgrep.yaml
+++ b/.github/workflows/semgrep.yaml
@@ -31,6 +31,6 @@ jobs:
 
       # Upload findings to GitHub Advanced Security Dashboard [step 2/2]
       - name: Upload SARIF file for GitHub Advanced Security Dashboard
-        uses: github/codeql-action/upload-sarif@54f647b7e1bb85c95cddabcd46b0c578ec92bc1a # v4.36.3
+        uses: github/codeql-action/upload-sarif@99df26d4f13ea111d4ec1a7dddef6063f76b97e9 # v4.37.0
         with:
           sarif_file: semgrep.sarif
\ No newline at end of file
diff --git a/go.mod b/go.mod
index a97a90e..fbe6b4b 100644
--- a/go.mod
+++ b/go.mod
@@ -9,7 +9,7 @@ go 1.26.4
 replace sigs.k8s.io/structured-merge-diff/v4 => sigs.k8s.io/structured-merge-diff/v4 v4.7.0
 
 require (
-	github.com/cert-manager/cert-manager v1.20.3
+	github.com/cert-manager/cert-manager v1.21.0
 	github.com/stackitcloud/stackit-sdk-go/core v0.26.0
 	github.com/stackitcloud/stackit-sdk-go/services/dns v0.21.0
 	github.com/stretchr/testify v1.11.1
diff --git a/go.sum b/go.sum
index 2c7f28c..c78f645 100644
--- a/go.sum
+++ b/go.sum
@@ -12,8 +12,8 @@ github.com/blang/semver/v4 v4.0.0 h1:1PFHFE6yCCTv8C1TeyNNarDzntLi7wMI5i/pzqYIsAM
 github.com/blang/semver/v4 v4.0.0/go.mod h1:IbckMUScFkM3pff0VJDNKRiT6TG/YpiHIM2yvyW5YoQ=
 github.com/cenkalti/backoff/v5 v5.0.3 h1:ZN+IMa753KfX5hd8vVaMixjnqRZ3y8CuJKRKj1xcsSM=
 github.com/cenkalti/backoff/v5 v5.0.3/go.mod h1:rkhZdG3JZukswDf7f0cwqPNk4K0sa+F97BxZthm/crw=
-github.com/cert-manager/cert-manager v1.20.3 h1:7zgThbjfRBNjN2/cM/Wdo/vl/oeFQybIMNzxd1Ocipc=
-github.com/cert-manager/cert-manager v1.20.3/go.mod h1:Aqf5P0xRh9aey1p10m2c3UAk/Vb/FBPyH3WQxJRm+7Y=
+github.com/cert-manager/cert-manager v1.21.0 h1:BCoB2BxA1lbqPusZCqPLPn8Q9MhraL7RbZGHbBcm3W8=
+github.com/cert-manager/cert-manager v1.21.0/go.mod h1:V8iALETs2W428CjBZ4Ez3DftDeyu0f8PZnHDTcliS4I=
 github.com/cespare/xxhash/v2 v2.3.0 h1:UL815xU9SqsFlibzuggzjXhog7bL6oX9BbNZnL2UFvs=
 github.com/cespare/xxhash/v2 v2.3.0/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XLFGgcrjCOs=
 github.com/coreos/go-semver v0.3.1 h1:yi21YpKnrx1gt5R+la8n5WgS0kCrsPp33dmEyHReZr4=