diff --git a/charts/argocd-image-updater/README.md b/charts/argocd-image-updater/README.md
index 00b13d14..5e51a8cd 100644
--- a/charts/argocd-image-updater/README.md
+++ b/charts/argocd-image-updater/README.md
@@ -81,6 +81,7 @@ The `config.registries` value can be used exactly as it looks in the documentati
 | config.gitCommitMail | string | `""` | E-Mail address to use for Git commits |
 | config.gitCommitSignOff | bool | `false` | Enables sign off on commits |
 | config.gitCommitSigningKey | string | `""` | Path to public SSH key mounted in container, or GPG key ID used to sign commits |
+| config.gitCommitSigningMethod | string | `""` | Method used to sign Git commits. `openpgp` or `ssh` |
 | config.gitCommitTemplate | string | `""` | Changing the Git commit message |
 | config.gitCommitUser | string | `""` | Username to use for Git commits |
 | config.logLevel | string | `"info"` | Argo CD Image Update log level |
diff --git a/charts/argocd-image-updater/templates/configmap.yaml b/charts/argocd-image-updater/templates/configmap.yaml
index 17800a4c..46ee3b80 100644
--- a/charts/argocd-image-updater/templates/configmap.yaml
+++ b/charts/argocd-image-updater/templates/configmap.yaml
@@ -37,6 +37,9 @@ data:
   {{- with .Values.config.gitCommitSignOff }}
   git.commit-sign-off: {{ . | quote }}
   {{- end }}
+  {{- with .Values.config.gitCommitSigningMethod }}
+  git.commit-signing-method: {{ . | quote }}
+  {{- end }}
   kube.events: {{ .Values.config.disableKubeEvents | quote }}
   {{- with .Values.config.registries }}
   registries.conf: |
diff --git a/charts/argocd-image-updater/values.yaml b/charts/argocd-image-updater/values.yaml
index 44bf8373..19291de9 100644
--- a/charts/argocd-image-updater/values.yaml
+++ b/charts/argocd-image-updater/values.yaml
@@ -139,6 +139,9 @@ config:
   # -- Enables sign off on commits
   gitCommitSignOff: false
 
+  # -- Method used to sign Git commits. `openpgp` or `ssh`
+  gitCommitSigningMethod: ""
+
   # -- Argo CD Image Update log level
   logLevel: "info"