diff --git a/go.mod b/go.mod
index 7a43554b10..4790fec3aa 100644
--- a/go.mod
+++ b/go.mod
@@ -20,13 +20,13 @@ require (
 	github.com/fluxcd/notification-controller/api v1.8.4
 	github.com/fluxcd/pkg/apis/event v0.26.0
 	github.com/fluxcd/pkg/apis/meta v1.29.0
-	github.com/fluxcd/pkg/auth v0.51.0
+	github.com/fluxcd/pkg/auth v0.52.0
 	github.com/fluxcd/pkg/chartutil v1.26.0
 	github.com/fluxcd/pkg/envsubst v1.7.0
-	github.com/fluxcd/pkg/git v0.50.0
-	github.com/fluxcd/pkg/kustomize v1.32.0
-	github.com/fluxcd/pkg/oci v0.66.0
-	github.com/fluxcd/pkg/runtime v0.108.0
+	github.com/fluxcd/pkg/git v0.51.0
+	github.com/fluxcd/pkg/kustomize v1.33.0
+	github.com/fluxcd/pkg/oci v0.67.0
+	github.com/fluxcd/pkg/runtime v0.109.0
 	github.com/fluxcd/pkg/sourceignore v0.18.0
 	github.com/fluxcd/pkg/ssa v0.75.0
 	github.com/fluxcd/pkg/ssh v0.25.0
diff --git a/go.sum b/go.sum
index e28b928c1c..db1349d941 100644
--- a/go.sum
+++ b/go.sum
@@ -194,24 +194,24 @@ github.com/fluxcd/pkg/apis/kustomize v1.18.0 h1:FCNjViCLyKYj6lddpnjXybKBTC2eK6eX
 github.com/fluxcd/pkg/apis/kustomize v1.18.0/go.mod h1:mvtMtM4NNLipdCna6DYPC6Bd42xeaF15N+tNO+F6kxY=
 github.com/fluxcd/pkg/apis/meta v1.29.0 h1:JRFbAqLQ9YJG5AXBb0urvH9ySYZ/WJqq1dPhfzCRvPs=
 github.com/fluxcd/pkg/apis/meta v1.29.0/go.mod h1:3DmYMnyH3XdY8/g2gXfsVIGEd/zpcB2PEkuurv2vgHU=
-github.com/fluxcd/pkg/auth v0.51.0 h1:yu5laG9dVyKGq2fDPem9gPTBfjdCEVPgKZ4M/oGAQWk=
-github.com/fluxcd/pkg/auth v0.51.0/go.mod h1:GWDfC5KhljE1ekKlfXVmod8H0uUm95ISlaAXULq2euk=
+github.com/fluxcd/pkg/auth v0.52.0 h1:MsHKQjSOFE13DE8lZu5tDPX3SIct2KfRZwzt5B5I73o=
+github.com/fluxcd/pkg/auth v0.52.0/go.mod h1:GWDfC5KhljE1ekKlfXVmod8H0uUm95ISlaAXULq2euk=
 github.com/fluxcd/pkg/cache v0.14.0 h1:wEwJA8NhYj+nH9P6ifcsglDZARWlcbxbmwngGOzfU4c=
 github.com/fluxcd/pkg/cache v0.14.0/go.mod h1:KwzU2gyVQ83YOHJsbBeveJ0HsXmLrH0I668zX19d/+s=
 github.com/fluxcd/pkg/chartutil v1.26.0 h1:bgXwDKl2uGITSDxOXe4N5HTXAL0ilk4YVbPLU3JDTCw=
 github.com/fluxcd/pkg/chartutil v1.26.0/go.mod h1:sWDcF//xpIwZ/MQupwTmuM/SgGCkfsTd9BVOQJ3cTjM=
 github.com/fluxcd/pkg/envsubst v1.7.0 h1:PL9Nj/V2fgaMR9KYZR7mEEw+vlYgP80nFZjOQQKAfJs=
 github.com/fluxcd/pkg/envsubst v1.7.0/go.mod h1:aoWeSIOamhqBZ3bHVj1GDwpdA10DXrI8yYbyjPiFly0=
-github.com/fluxcd/pkg/git v0.50.0 h1:gbGmSTjQ6CxqFmT9ZkLfYh8kG7CHqc7gHoPqcygixK8=
-github.com/fluxcd/pkg/git v0.50.0/go.mod h1:OgaHoS0iR0GuLl+f778X7NrGy1pDH7xcpF/nsCRgJ9g=
+github.com/fluxcd/pkg/git v0.51.0 h1:RNA7exXM6QIXozR654CdWAQjR5LUUw3r3TeE3gAaYSc=
+github.com/fluxcd/pkg/git v0.51.0/go.mod h1:OgaHoS0iR0GuLl+f778X7NrGy1pDH7xcpF/nsCRgJ9g=
 github.com/fluxcd/pkg/gittestserver v0.29.0 h1:2j03zKVL6iVn6oiUuecG/O/3Q1pULWM9JrF/HSjkpnc=
 github.com/fluxcd/pkg/gittestserver v0.29.0/go.mod h1:O8151jV0ppBZTb9IUXMjxh6hZpkiuLq8JQHDBPOkZFw=
-github.com/fluxcd/pkg/kustomize v1.32.0 h1:5lLT2dgR+JrcoJHB7/K50o0AcJikKvXcRd3r7jIYZC8=
-github.com/fluxcd/pkg/kustomize v1.32.0/go.mod h1:Xz1QIUIKexXuSolRQY63843wSycPVuIsVhE9C+aJWl8=
-github.com/fluxcd/pkg/oci v0.66.0 h1:nlBA3/MvJShjA+VFPKDRoXLUpH+e8THVvCMST+qUTlI=
-github.com/fluxcd/pkg/oci v0.66.0/go.mod h1:9Z4Juu/BhLLKHKOkOalfwIkZYsjTViD0YDHzW9w5R9c=
-github.com/fluxcd/pkg/runtime v0.108.0 h1:sSXz6FWcRT+tkfddiCmehrYaEKqkVFkcBWDhGMNJtH4=
-github.com/fluxcd/pkg/runtime v0.108.0/go.mod h1:TaBSfm7UcRTM4605S6R86DT+XE1kOCC+YIJe8zZ8jno=
+github.com/fluxcd/pkg/kustomize v1.33.0 h1:m3i2W3gwlJyrQD8KzeMEjzMsoOzLODW0kt/4P+7sjHE=
+github.com/fluxcd/pkg/kustomize v1.33.0/go.mod h1:Xz1QIUIKexXuSolRQY63843wSycPVuIsVhE9C+aJWl8=
+github.com/fluxcd/pkg/oci v0.67.0 h1:pGI6F+MCNkTuAF5LJN7Xs1Dyw2WSfuDpMjVZplAEcpE=
+github.com/fluxcd/pkg/oci v0.67.0/go.mod h1:9Z4Juu/BhLLKHKOkOalfwIkZYsjTViD0YDHzW9w5R9c=
+github.com/fluxcd/pkg/runtime v0.109.0 h1:XkB0urXYC+nFhgtl7AePtXeNinFGpak5Hipx+TZJUuY=
+github.com/fluxcd/pkg/runtime v0.109.0/go.mod h1:TaBSfm7UcRTM4605S6R86DT+XE1kOCC+YIJe8zZ8jno=
 github.com/fluxcd/pkg/sourceignore v0.18.0 h1:WU2tPKasG9AM7/H/LlqdjULyaSknnZBTrpHsDDtOuns=
 github.com/fluxcd/pkg/sourceignore v0.18.0/go.mod h1:mnH7rFFlEbMTclhz7JZP7tiHssKdXRNpCqnly2JGvaI=
 github.com/fluxcd/pkg/ssa v0.75.0 h1:u6K/hy4rqVaH5xHWwfFtioh8I+013eFRb612Rz+dnzk=
diff --git a/pkg/bootstrap/bootstrap_plain_git.go b/pkg/bootstrap/bootstrap_plain_git.go
index f39b08b775..fe89164108 100644
--- a/pkg/bootstrap/bootstrap_plain_git.go
+++ b/pkg/bootstrap/bootstrap_plain_git.go
@@ -43,6 +43,7 @@ import (
 	"github.com/fluxcd/pkg/apis/meta"
 	"github.com/fluxcd/pkg/git"
 	"github.com/fluxcd/pkg/git/repository"
+	gitsignature "github.com/fluxcd/pkg/git/signature"
 	"github.com/fluxcd/pkg/kustomize/filesys"
 	runclient "github.com/fluxcd/pkg/runtime/client"
 	sourcev1 "github.com/fluxcd/source-controller/api/v1"
@@ -155,11 +156,11 @@ func (b *PlainGitBootstrapper) ReconcileComponents(ctx context.Context, manifest
 	b.logger.Successf("generated component manifests")
 
 	// Write generated files and make a commit
-	var signer *openpgp.Entity
+	var signer gitsignature.Signer
 	if b.gpgKeyRing != nil {
-		signer, err = getOpenPgpEntity(b.gpgKeyRing, b.gpgPassphrase, b.gpgKeyID)
+		signer, err = getOpenPgpSigner(b.gpgKeyRing, b.gpgPassphrase, b.gpgKeyID)
 		if err != nil {
-			return fmt.Errorf("failed to generate OpenPGP entity: %w", err)
+			return fmt.Errorf("failed to generate OpenPGP signer: %w", err)
 		}
 	}
 	commitMsg := fmt.Sprintf("Add Flux %s component manifests", options.Version)
@@ -330,11 +331,11 @@ func (b *PlainGitBootstrapper) ReconcileSyncConfig(ctx context.Context, options
 	b.logger.Successf("generated sync manifests")
 
 	// Write generated files and make a commit
-	var signer *openpgp.Entity
+	var signer gitsignature.Signer
 	if b.gpgKeyRing != nil {
-		signer, err = getOpenPgpEntity(b.gpgKeyRing, b.gpgPassphrase, b.gpgKeyID)
+		signer, err = getOpenPgpSigner(b.gpgKeyRing, b.gpgPassphrase, b.gpgKeyID)
 		if err != nil {
-			return fmt.Errorf("failed to generate OpenPGP entity: %w", err)
+			return fmt.Errorf("failed to generate OpenPGP signer: %w", err)
 		}
 	}
 	commitMsg := "Add Flux sync manifests"
@@ -511,6 +512,19 @@ func (b *PlainGitBootstrapper) cleanGitRepoDir() error {
 	return errors.Join(errs...)
 }
 
+func getOpenPgpSigner(keyRing openpgp.EntityList, passphrase, keyID string) (gitsignature.Signer, error) {
+	entity, err := getOpenPgpEntity(keyRing, passphrase, keyID)
+	if err != nil {
+		return nil, err
+	}
+
+	signer, err := gitsignature.NewOpenPGPSigner(entity)
+	if err != nil {
+		return nil, fmt.Errorf("unable to create OpenPGP signer: %w", err)
+	}
+	return signer, nil
+}
+
 func getOpenPgpEntity(keyRing openpgp.EntityList, passphrase, keyID string) (*openpgp.Entity, error) {
 	if len(keyRing) == 0 {
 		return nil, fmt.Errorf("empty GPG key ring")
diff --git a/tests/integration/go.mod b/tests/integration/go.mod
index efc8df71e5..6698d216f1 100644
--- a/tests/integration/go.mod
+++ b/tests/integration/go.mod
@@ -13,8 +13,8 @@ require (
 	github.com/fluxcd/notification-controller/api v1.8.4
 	github.com/fluxcd/pkg/apis/event v0.26.0
 	github.com/fluxcd/pkg/apis/meta v1.29.0
-	github.com/fluxcd/pkg/git v0.50.0
-	github.com/fluxcd/pkg/runtime v0.108.0
+	github.com/fluxcd/pkg/git v0.51.0
+	github.com/fluxcd/pkg/runtime v0.109.0
 	github.com/fluxcd/source-controller/api v1.8.5
 	github.com/fluxcd/test-infra/tftestenv v0.0.0-20260419142339-c6535d1fff77
 	github.com/go-git/go-git/v5 v5.19.1
diff --git a/tests/integration/go.sum b/tests/integration/go.sum
index b6d6025272..f0f87159fd 100644
--- a/tests/integration/go.sum
+++ b/tests/integration/go.sum
@@ -111,12 +111,12 @@ github.com/fluxcd/pkg/apis/kustomize v1.18.0 h1:FCNjViCLyKYj6lddpnjXybKBTC2eK6eX
 github.com/fluxcd/pkg/apis/kustomize v1.18.0/go.mod h1:mvtMtM4NNLipdCna6DYPC6Bd42xeaF15N+tNO+F6kxY=
 github.com/fluxcd/pkg/apis/meta v1.29.0 h1:JRFbAqLQ9YJG5AXBb0urvH9ySYZ/WJqq1dPhfzCRvPs=
 github.com/fluxcd/pkg/apis/meta v1.29.0/go.mod h1:3DmYMnyH3XdY8/g2gXfsVIGEd/zpcB2PEkuurv2vgHU=
-github.com/fluxcd/pkg/git v0.50.0 h1:gbGmSTjQ6CxqFmT9ZkLfYh8kG7CHqc7gHoPqcygixK8=
-github.com/fluxcd/pkg/git v0.50.0/go.mod h1:OgaHoS0iR0GuLl+f778X7NrGy1pDH7xcpF/nsCRgJ9g=
+github.com/fluxcd/pkg/git v0.51.0 h1:RNA7exXM6QIXozR654CdWAQjR5LUUw3r3TeE3gAaYSc=
+github.com/fluxcd/pkg/git v0.51.0/go.mod h1:OgaHoS0iR0GuLl+f778X7NrGy1pDH7xcpF/nsCRgJ9g=
 github.com/fluxcd/pkg/gittestserver v0.29.0 h1:2j03zKVL6iVn6oiUuecG/O/3Q1pULWM9JrF/HSjkpnc=
 github.com/fluxcd/pkg/gittestserver v0.29.0/go.mod h1:O8151jV0ppBZTb9IUXMjxh6hZpkiuLq8JQHDBPOkZFw=
-github.com/fluxcd/pkg/runtime v0.108.0 h1:sSXz6FWcRT+tkfddiCmehrYaEKqkVFkcBWDhGMNJtH4=
-github.com/fluxcd/pkg/runtime v0.108.0/go.mod h1:TaBSfm7UcRTM4605S6R86DT+XE1kOCC+YIJe8zZ8jno=
+github.com/fluxcd/pkg/runtime v0.109.0 h1:XkB0urXYC+nFhgtl7AePtXeNinFGpak5Hipx+TZJUuY=
+github.com/fluxcd/pkg/runtime v0.109.0/go.mod h1:TaBSfm7UcRTM4605S6R86DT+XE1kOCC+YIJe8zZ8jno=
 github.com/fluxcd/pkg/ssh v0.25.0 h1:4Y9WmuNqyKvH759UznU5DGHRcOuoJ/dQM6sbsaDZYYM=
 github.com/fluxcd/pkg/ssh v0.25.0/go.mod h1:Fli2Ogu4uaIVGbCy+r0vvZlMO0RfuInyNY1q2FVIx0o=
 github.com/fluxcd/pkg/version v0.15.0 h1:E2Ju4i0vj8ZXLHKz/F4a8JTmDh7Jcg8okB0hK5rEoTM=