diff --git a/apiclient/operation/operation_client.go b/apiclient/operation/operation_client.go
index 5b3942a..4c36e2f 100644
--- a/apiclient/operation/operation_client.go
+++ b/apiclient/operation/operation_client.go
@@ -37,7 +37,7 @@ func (a *Client) Cacerts(params *CacertsParams) (*CacertsOK, error) {
 		ID:                 "cacerts",
 		Method:             "GET",
 		PathPattern:        "/cacerts",
-		ProducesMediaTypes: []string{"text/plain"},
+		ProducesMediaTypes: []string{"application/pkcs7-mime"},
 		ConsumesMediaTypes: []string{""},
 		Schemes:            []string{"https"},
 		Params:             params,
@@ -65,7 +65,7 @@ func (a *Client) Simpleenroll(params *SimpleenrollParams, authInfo runtime.Clien
 		ID:                 "simpleenroll",
 		Method:             "POST",
 		PathPattern:        "/simpleenroll",
-		ProducesMediaTypes: []string{"text/plain"},
+		ProducesMediaTypes: []string{"application/pkcs7-mime"},
 		ConsumesMediaTypes: []string{"application/pkcs10"},
 		Schemes:            []string{"https"},
 		Params:             params,
@@ -94,7 +94,7 @@ func (a *Client) Simplereenroll(params *SimplereenrollParams, authInfo runtime.C
 		ID:                 "simplereenroll",
 		Method:             "POST",
 		PathPattern:        "/simplereenroll",
-		ProducesMediaTypes: []string{"text/plain"},
+		ProducesMediaTypes: []string{"application/pkcs7-mime"},
 		ConsumesMediaTypes: []string{"application/pkcs10"},
 		Schemes:            []string{"https"},
 		Params:             params,
diff --git a/apispec/rfc7030.yml b/apispec/rfc7030.yml
index 5132df3..6e673f3 100644
--- a/apispec/rfc7030.yml
+++ b/apispec/rfc7030.yml
@@ -40,7 +40,7 @@ paths:
       summary: Distribution of CA Certificates
       operationId: cacerts
       produces:
-        - text/plain
+        - application/pkcs7-mime
       responses:
         200:
           description: successful operation
@@ -68,7 +68,7 @@ paths:
       consumes:
         - application/pkcs10
       produces:
-        - text/plain
+        - application/pkcs7-mime
       parameters:
         - name: certrequest
           in: body
@@ -109,7 +109,7 @@ paths:
       consumes:
         - application/pkcs10
       produces:
-        - text/plain
+        - application/pkcs7-mime
       parameters:
         - name: certrequest
           in: body