diff --git a/http/httpErr.go b/http/httpErr.go
index 6780419..61337a1 100644
--- a/http/httpErr.go
+++ b/http/httpErr.go
@@ -32,8 +32,8 @@ func ProblemDetails(
 	details *string,
 	extras map[string]any,
 ) {
-	w.WriteHeader(statusCode)
 	w.Header().Add("Content-Type", "application/problem+json")
+	w.WriteHeader(statusCode)
 	data := map[string]any{
 		"type":   errorType,
 		"status": statusCode,
@@ -58,8 +58,8 @@ func ProblemDetails(
 // Write a simple problem details response.
 // It only provides the status code, as defined in RFC 9457, section 4.2.1
 func ProblemDetailsStatusOnly(w http.ResponseWriter, statusCode int) {
-	w.WriteHeader(statusCode)
 	w.Header().Add("Content-Type", "application/problem+json")
+	w.WriteHeader(statusCode)
 	data := map[string]any{
 		"type":      "about:blank",
 		"title":     http.StatusText(statusCode),