diff --git a/config/fulcio-config.yaml b/config/fulcio-config.yaml
index 83a1b3d61..bf4528b7f 100644
--- a/config/fulcio-config.yaml
+++ b/config/fulcio-config.yaml
@@ -20,103 +20,86 @@ data:
             "https://accounts.google.com": {
               "IssuerURL": "https://accounts.google.com",
               "ClientID": "sigstore",
-              "Type": "email",
-              "SubType": ""
+              "Type": "email"
             },
             "https://agent.buildkite.com": {
               "IssuerURL": "https://agent.buildkite.com",
               "ClientID": "sigstore",
-              "Type": "buildkite-job",
-              "SubType": ""
+              "Type": "buildkite-job"
             },
             "https://allow.pub": {
               "IssuerURL": "https://allow.pub",
               "ClientID": "sigstore",
               "Type": "spiffe",
-              "SubType": "",
               "SPIFFETrustDomain": "allow.pub"
             },
             "https://auth-staging.eclipse.org/realms/sigstore": {
               "IssuerURL": "https://auth-staging.eclipse.org/realms/sigstore",
               "ClientID": "sigstore",
-              "Type": "email",
-              "SubType": ""
+              "Type": "email"
             },
             "https://auth.eclipse.org/auth/realms/sigstore": {
               "IssuerURL": "https://auth.eclipse.org/auth/realms/sigstore",
               "ClientID": "sigstore",
-              "Type": "email",
-              "SubType": ""
+              "Type": "email"
             },
             "https://dev.gitlab.org": {
               "IssuerURL": "https://dev.gitlab.org",
               "ClientID": "sigstore",
-              "Type": "gitlab-pipeline",
-              "SubType": ""
+              "Type": "gitlab-pipeline"
             },
             "https://gitlab.archlinux.org": {
               "IssuerURL": "https://gitlab.archlinux.org",
               "ClientID": "sigstore",
-              "Type": "gitlab-pipeline",
-              "SubType": ""
+              "Type": "gitlab-pipeline"
             },
             "https://gitlab.com": {
               "IssuerURL": "https://gitlab.com",
               "ClientID": "sigstore",
-              "Type": "gitlab-pipeline",
-              "SubType": ""
+              "Type": "gitlab-pipeline"
             },
             "https://oauth2.sigstore.dev/auth": {
               "IssuerURL": "https://oauth2.sigstore.dev/auth",
               "ClientID": "sigstore",
               "Type": "email",
-              "SubType": "",
               "IssuerClaim": "$.federated_claims.connector_id"
             },
             "https://oidc.codefresh.io": {
               "IssuerURL": "https://oidc.codefresh.io",
               "ClientID": "sigstore",
-              "Type": "codefresh-workflow",
-              "SubType": ""
+              "Type": "codefresh-workflow"
             },
             "https://ops.gitlab.net": {
               "IssuerURL": "https://ops.gitlab.net",
               "ClientID": "sigstore",
-              "Type": "gitlab-pipeline",
-              "SubType": ""
+              "Type": "gitlab-pipeline"
             },
             "https://token.actions.githubusercontent.com": {
               "IssuerURL": "https://token.actions.githubusercontent.com",
               "ClientID": "sigstore",
-              "Type": "github-workflow",
-              "SubType": ""
+              "Type": "github-workflow"
             }
           },
           "MetaIssuers": {
             "https://*.oic.prod-aks.azure.com/*": {
               "ClientID": "sigstore",
-              "Type": "kubernetes",
-              "SubType": ""
+              "Type": "kubernetes"
             },
             "https://container.googleapis.com/v1/projects/*/locations/*/clusters/*": {
               "ClientID": "sigstore",
-              "Type": "kubernetes",
-              "SubType": ""
+              "Type": "kubernetes"
             },
             "https://oidc.eks.*.amazonaws.com/id/*": {
               "ClientID": "sigstore",
-              "Type": "kubernetes",
-              "SubType": ""
+              "Type": "kubernetes"
             },
             "https://oidc.prod-aks.azure.com/*": {
               "ClientID": "sigstore",
-              "Type": "kubernetes",
-              "SubType": ""
+              "Type": "kubernetes"
             },
             "https://token.actions.githubusercontent.com/*": {
               "ClientID": "sigstore",
-              "Type": "github-workflow",
-              "SubType": ""
+              "Type": "github-workflow"
             }
           },
           "IssuersMetadata": null
diff --git a/pkg/config/config.go b/pkg/config/config.go
index d112e4c1b..052147338 100644
--- a/pkg/config/config.go
+++ b/pkg/config/config.go
@@ -87,7 +87,7 @@ type OIDCIssuer struct {
 	// certificate values are needed
 	Type IssuerType `json:"Type" yaml:"type,omitempty"`
 	// Issuers subtype
-	SubType string `json:"SubType" yaml:"sub-type,omitempty"`
+	SubType string `json:"SubType,omitempty" yaml:"sub-type,omitempty"`
 	// Optional, if the issuer is in a different claim in the OIDC token
 	IssuerClaim string `json:"IssuerClaim,omitempty" yaml:"issuer-claim,omitempty"`
 	// The domain that must be present in the subject for 'uri' issuer types