diff --git a/.github/workflows/auto-close-duplicate.yaml b/.github/workflows/auto-close-duplicate.yaml
index aa6457ed..2eea099e 100644
--- a/.github/workflows/auto-close-duplicate.yaml
+++ b/.github/workflows/auto-close-duplicate.yaml
@@ -21,7 +21,7 @@ jobs:
           # Get issues with state to compare. Supported state: 'all', 'closed', 'open'.
           state: open
           # If similarity is higher than this threshold([0,1]), issue will be marked as duplicate.
-          threshold: 0.6
+          threshold: 0.9
           # Reactions to be add to comment when potential duplicates are detected.
           # Available reactions: "-1", "+1", "confused", "laugh", "heart", "hooray", "rocket", "eyes"
           reactions: ''
diff --git a/src/invidious.cr b/src/invidious.cr
index b5abd5c7..27c4775e 100644
--- a/src/invidious.cr
+++ b/src/invidious.cr
@@ -57,8 +57,9 @@ end
 # Simple alias to make code easier to read
 alias IV = Invidious
 
-CONFIG   = Config.load
-HMAC_KEY = CONFIG.hmac_key || Random::Secure.hex(32)
+CONFIG              = Config.load
+HMAC_KEY_CONFIGURED = CONFIG.hmac_key != nil
+HMAC_KEY            = CONFIG.hmac_key || Random::Secure.hex(32)
 
 PG_DB       = DB.open CONFIG.database_url
 ARCHIVE_URL = URI.parse("https://archive.org")
@@ -230,6 +231,10 @@ Kemal.config.host_binding = Kemal.config.host_binding != "0.0.0.0" ? Kemal.confi
 Kemal.config.port = Kemal.config.port != 3000 ? Kemal.config.port : CONFIG.port
 Kemal.config.app_name = "Invidious"
 
+if !HMAC_KEY_CONFIGURED
+  LOGGER.warn("Please configure hmac_key by July 1st, see more here: https://github.com/iv-org/invidious/issues/3854")
+end
+
 # Use in kemal's production mode.
 # Users can also set the KEMAL_ENV environmental variable for this to be set automatically.
 {% if flag?(:release) || flag?(:production) %}
diff --git a/src/invidious/views/template.ecr b/src/invidious/views/template.ecr
index 5852b63e..63be2bda 100644
--- a/src/invidious/views/template.ecr
+++ b/src/invidious/views/template.ecr
@@ -94,6 +94,14 @@
             <% end %>
 
 	    <div class="bgippan">
+            <% if env.get? "user" %>
+                <% if !HMAC_KEY_CONFIGURED && CONFIG.admins.includes? env.get("user").as(Invidious::User).email %>
+                <div class="h-box">
+                        <h3><p>Message for admin: please configure hmac_key, <a href="https://github.com/iv-org/invidious/issues/3854">see more here</a>.</p></h3>
+                    </div>
+                <% end %>
+            <% end %>
+
                 <%= content %>
 	    </div>