diff --git a/lib/core/JupyterShellMessage.ml b/lib/core/JupyterShellMessage.ml
index 24c20d5..fd47595 100644
--- a/lib/core/JupyterShellMessage.ml
+++ b/lib/core/JupyterShellMessage.ml
@@ -117,13 +117,19 @@ type language_info =
     nbconverter_exporter : string option;
   } [@@deriving yojson { strict = false }]
 
+type help_link =
+  {
+    text : string;
+    url : string;
+  } [@@deriving yojson { strict = false }]
+
 type kernel_info_reply =
   {
     protocol_version : string;
     implemenation : string;
     implementation_version : string;
     banner : string option;
-    help_links : Yojson.Safe.json;
+    help_links : help_link list;
     language_info : language_info;
     language : string;
   } [@@deriving yojson { strict = false }]
@@ -135,7 +141,12 @@ let kernel_info_reply =
     implemenation = "ocaml-jupyter";
     implementation_version = JupyterVersion.kernel_version;
     banner = None;
-    help_links = `Assoc [];
+    help_links = [
+      {
+        text = "ocaml-jupyter";
+        url = "https://akabe.github.io/ocaml-jupyter/";
+      };
+    ];
     language = "OCaml";
     language_info =
       {
diff --git a/test/Fixture.ml b/test/Fixture.ml
index 3fad475..436405c 100644
--- a/test/Fixture.ml
+++ b/test/Fixture.ml
@@ -60,7 +60,7 @@ end
 module KernelInfoReply =
 struct
   let key = "167ff8c8-fe494afc147b4fa62758ed82"
-  let hmac = "7cd42e8ad6577c8dcd56eebac4f5d516311160df81f0a06d6ea22ec898dd0b94"
+  let hmac = "94ef4fd43f3611069e32d96512b0db3a20aa8be73a435dd2c7458b073e254452"
   let header = "{\"msg_id\":\"3a21737c-0287-30f3-bfa9-12e193dfd00a\",\
                 \"msg_type\":\"kernel_info_reply\",\
                 \"session\":\"A32B9A2038D043F2A0718550AAAFC9DA\",\
@@ -77,7 +77,7 @@ struct
                  \"implemenation\":\"ocaml-jupyter\",\
                  \"implementation_version\":\"5.0.0\",\
                  \"banner\":null,\
-                 \"help_links\":{},\
+                 \"help_links\":[],\
                  \"language_info\":{\
                  \"name\":\"OCaml\",\
                  \"version\":\"4.04.1\",\
@@ -114,7 +114,7 @@ struct
           implemenation = "ocaml-jupyter";
           implementation_version = "5.0.0";
           banner = None;
-          help_links = `Assoc [];
+          help_links = [];
           language = "OCaml";
           language_info =
             {