diff --git a/deps.edn b/deps.edn
index 1ec431f..2defffd 100644
--- a/deps.edn
+++ b/deps.edn
@@ -8,9 +8,9 @@
  :paths ["src" "resources"]
  :deps {org.clojure/clojure {:mvn/version "1.12.0-alpha1"}
         com.github.strojure/zmap {:mvn/version "1.3.26"}
-        io.helidon.http/helidon-http {:mvn/version "4.0.0-M2"}
-        io.helidon.webserver/helidon-webserver {:mvn/version "4.0.0-M2"}
-        io.helidon.webserver/helidon-webserver-http2 {:mvn/version "4.0.0-M2"}}
+        io.helidon.http/helidon-http {:mvn/version "4.0.0-RC1"}
+        io.helidon.webserver/helidon-webserver {:mvn/version "4.0.0-RC1"}
+        io.helidon.webserver/helidon-webserver-http2 {:mvn/version "4.0.0-RC1"}}
 
  :aliases
  {:test {:extra-paths ["test"]
diff --git a/src/s_exp/mina/request.clj b/src/s_exp/mina/request.clj
index e0e3947..7a481e1 100644
--- a/src/s_exp/mina/request.clj
+++ b/src/s_exp/mina/request.clj
@@ -12,22 +12,21 @@
             Util)
            (io.helidon.http
             Headers
-            Http$Header
-            Http$HeaderName
-            Http$HeaderNames
-            ServerRequestHeaders)
+            Header
+            HeaderName
+            HeaderNames)
            (io.helidon.webserver.http ServerRequest ServerResponse)
            (java.util Map)))
 
-(defn header-name ^Http$HeaderName
+(defn header-name ^HeaderName
   [s]
-  (Http$HeaderNames/createFromLowercase s))
+  (HeaderNames/createFromLowercase s))
 
 (defn header->value*
   ([^Headers header header-name]
    (header->value* header header-name nil))
   ([^Headers header
-    ^Http$HeaderName header-name not-found]
+    ^HeaderName header-name not-found]
    (-> header
        (.value header-name)
        (.orElse not-found))))
@@ -42,7 +41,7 @@
 
 (defn ring-headers*
   [^Headers headers]
-  (-> (reduce (fn [m ^Http$Header h]
+  (-> (reduce (fn [m ^Header h]
                 (assoc! m
                         (.lowerCase (.headerName h))
                         (.value h)))
@@ -147,7 +146,7 @@
   (iterator [_]
     (->> headers
          .iterator
-         (eduction (map (fn [^Http$Header header]
+         (eduction (map (fn [^Header header]
                           (MapEntry. (.lowerCase (.headerName header))
                                      (.value header)))))))
 
diff --git a/src/s_exp/mina/response.clj b/src/s_exp/mina/response.clj
index 39ad928..717bb83 100644
--- a/src/s_exp/mina/response.clj
+++ b/src/s_exp/mina/response.clj
@@ -1,8 +1,9 @@
 (ns s-exp.mina.response
-  (:import (io.helidon.http Http$Headers
-                            Http$HeaderNames
-                            Http$HeaderName
-                            Http$Status)
+  (:import (io.helidon.http Header
+                            Headers
+                            HeaderNames
+                            HeaderName
+                            Status)
            (io.helidon.webserver.http ServerResponse)
            (java.io FileInputStream InputStream OutputStream)))
 
@@ -36,22 +37,25 @@
   (write-body! [o server-response]
     (.send ^ServerResponse server-response o)))
 
-(defn header-name ^Http$HeaderName [ring-header-name]
-  (Http$HeaderNames/createFromLowercase (name ring-header-name)))
+(defn header-name ^HeaderName [ring-header-name]
+  (HeaderNames/createFromLowercase (name ring-header-name)))
 
 (defn set-headers!
   [^ServerResponse server-response headers]
   (when headers
     (run! (fn [[k v]]
             (.header server-response
-                     (Http$Headers/create (header-name k)
-                                          v)))
+                     (header-name k)
+                     (if (sequential? v)
+                       (into-array String v)
+                       (doto (make-array String 1)
+                         (aset 0 v)))))
           headers)))
 
 (defn- set-status!
   [^ServerResponse server-response status]
   (when status
-    (.status server-response (Http$Status/create status))))
+    (.status server-response (Status/create status))))
 
 (defn set-response!
   [^ServerResponse server-response {:keys [body headers status]}]