diff --git a/club/templates/club/fragments/add_member.jinja b/club/templates/club/fragments/add_member.jinja
index d1e6e97c..742f6ee2 100644
--- a/club/templates/club/fragments/add_member.jinja
+++ b/club/templates/club/fragments/add_member.jinja
@@ -7,7 +7,7 @@
 
   <form
     hx-post="{{ url('club:club_new_members', club_id=club.id) }}"
-    hx-disabled-elt="find input[type='submit']"
+    hx-disable="find input[type='submit']"
     hx-swap="outerHTML"
     hx-target="#member-fragment-container"
     id="add_club_members_form"
diff --git a/core/static/bundled/base-bundle-index.ts b/core/static/bundled/base-bundle-index.ts
index 65914f7a..8556a99e 100644
--- a/core/static/bundled/base-bundle-index.ts
+++ b/core/static/bundled/base-bundle-index.ts
@@ -6,10 +6,15 @@
  * for more efficient tree-shaking and gzip compression.
  */
 
+// Must be loaded before Apline
+import htmx from "htmx.org";
+import "htmx.org/dist/ext/hx-alpine-compat.js";
+import "htmx.org/dist/ext/hx-prompt.js";
+import "htmx.org/dist/ext/hx-download.js";
+
 import sort from "@alpinejs/sort";
 import Alpine from "alpinejs";
 import { polyfillCountryFlagEmojis } from "country-flag-emoji-polyfill";
-import htmx from "htmx.org";
 import { limitedChoices } from "#core:alpine/limited-choices";
 import { expireOldStorage } from "#core:core/localstorage";
 import { default as navbar } from "#core:core/navbar";
@@ -44,16 +49,16 @@ polyfillCountryFlagEmojis();
  * HTMX
  */
 document.body.addEventListener(
-  "htmx:beforeRequest" as keyof HTMLElementEventMap,
+  "htmx:before:request" as keyof HTMLElementEventMap,
   (event) => {
-    (event as CustomEvent).detail.target.ariaBusy = true;
+    (event as CustomEvent).detail.ctx.target.ariaBusy = true;
   },
 );
 
 document.body.addEventListener(
-  "htmx:beforeSwap" as keyof HTMLElementEventMap,
+  "htmx:before:swap" as keyof HTMLElementEventMap,
   (event) => {
-    (event as CustomEvent).detail.target.ariaBusy = null;
+    (event as CustomEvent).detail.ctx.target.ariaBusy = null;
   },
 );
 
diff --git a/core/templates/core/fragment/user_visibility.jinja b/core/templates/core/fragment/user_visibility.jinja
index b92901bf..82e4f0ea 100644
--- a/core/templates/core/fragment/user_visibility.jinja
+++ b/core/templates/core/fragment/user_visibility.jinja
@@ -1,6 +1,6 @@
 <form
   hx-post="{{ url("core:user_visibility_fragment", user_id=form.instance.id) }}"
-  hx-disabled-elt="find input[type='submit']"
+  hx-disable="find input[type='submit']"
   hx-swap="outerHTML" x-data="{ isViewable: {{ form.is_viewable.value()|tojson }} }"
 >
   {% for message in messages %}
diff --git a/counter/templates/counter/fragments/delete_student_card.jinja b/counter/templates/counter/fragments/delete_student_card.jinja
index 94be1c47..e5ea7e52 100644
--- a/counter/templates/counter/fragments/delete_student_card.jinja
+++ b/counter/templates/counter/fragments/delete_student_card.jinja
@@ -1,5 +1,10 @@
 <div id="student_card_form">
-  <form hx-post="{{ action }}" hx-swap="outerHTML" hx-target="#student_card_form">
+  <form
+    hx-post="{{ action }}"
+    hx-swap="outerHTML"
+    hx-target="#student_card_form"
+    hx-disable="input[type='submit']"
+  >
     {% csrf_token %}
     <p>{% trans obj=object %}Are you sure you want to delete "{{ obj }}"?{% endtrans %}</p>
     <input type="submit" value="{% trans %}Confirm{% endtrans %}" />
diff --git a/docs/explanation/technos.md b/docs/explanation/technos.md
index 79a5ab0c..d19a274f 100644
--- a/docs/explanation/technos.md
+++ b/docs/explanation/technos.md
@@ -217,7 +217,7 @@ C'est une technologie simple et puissante qui se veut comme le jQuery du web mod
 
 ### Htmx
 
-[Site officiel](https://htmx.org/)
+[Site officiel](https://four.htmx.org/)
 
 En plus de AlpineJS, l’interactivité sur le site est augmentée via Htmx.
 C'est une librairie js qui s'utilise également au moyen d'attributs HTML à
diff --git a/election/templates/election/fragments/apply_result.jinja b/election/templates/election/fragments/apply_result.jinja
index 8e9d10e2..ab61ff04 100644
--- a/election/templates/election/fragments/apply_result.jinja
+++ b/election/templates/election/fragments/apply_result.jinja
@@ -41,7 +41,7 @@
       hx-post="{{ url("election:apply_result", election_id=form.election.id) }}"
       hx-swap="outerHTML"
       hx-target="#apply-election-result-fragment"
-      hx-disabled-elt="find input[type='submit']"
+      hx-disable="find input[type='submit']"
     >
       {% csrf_token %}
       {{ form }}
diff --git a/package-lock.json b/package-lock.json
index 42c1ae3c..323b58bf 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -30,7 +30,7 @@
         "easymde": "^2.21.0",
         "glob": "^13.0.6",
         "html2canvas": "^1.4.1",
-        "htmx.org": "^2.0.10",
+        "htmx.org": "^4.0.0",
         "js-cookie": "^3.0.8",
         "lit-html": "^3.3.3",
         "native-file-system-adapter": "^3.0.1",
@@ -3801,10 +3801,16 @@
       }
     },
     "node_modules/htmx.org": {
-      "version": "2.0.10",
-      "resolved": "https://registry.npmjs.org/htmx.org/-/htmx.org-2.0.10.tgz",
-      "integrity": "sha512-kdeJe7ZVwaS6QMz/ebBIVtZdpwen6L0OQ5GOhPV9MKBb196TCZeZu4yA7ZIQsaLKv7EpXz+So7KSXNuHXhj7Cw==",
-      "license": "0BSD"
+      "version": "4.0.0",
+      "resolved": "https://registry.npmjs.org/htmx.org/-/htmx.org-4.0.0.tgz",
+      "integrity": "sha512-T/171FUY93Kdfp8t+DnHdk45QvKRiBhVhhrwSzrXgUi4pHKvhp77dUA/qg8FAjsFWPIHNbmUuIdCrcVHuiZWng==",
+      "license": "BSD-0-Clause",
+      "workspaces": [
+        "ext/*"
+      ],
+      "bin": {
+        "upgrade-check": "dist/scripts/upgrade-check.js"
+      }
     },
     "node_modules/ical.js": {
       "version": "1.5.0",
diff --git a/package.json b/package.json
index c4e493ae..45419643 100644
--- a/package.json
+++ b/package.json
@@ -34,8 +34,8 @@
     "@types/cytoscape-klay": "^3.1.5",
     "@types/js-cookie": "^3.0.6",
     "@types/node": "^26.2.0",
-    "rollup-plugin-visualizer": "^7.1.1",
     "@typescript/native": "npm:typescript@^7.0.2",
+    "rollup-plugin-visualizer": "^7.1.1",
     "typescript": "npm:@typescript/typescript6@^6.0.2",
     "vite": "^8.2.2"
   },
@@ -61,7 +61,7 @@
     "easymde": "^2.21.0",
     "glob": "^13.0.6",
     "html2canvas": "^1.4.1",
-    "htmx.org": "^2.0.10",
+    "htmx.org": "^4.0.0",
     "js-cookie": "^3.0.8",
     "lit-html": "^3.3.3",
     "native-file-system-adapter": "^3.0.1",
diff --git a/subscription/templates/subscription/fragments/creation_form_existing_user.jinja b/subscription/templates/subscription/fragments/creation_form_existing_user.jinja
index e6333e98..61e9972e 100644
--- a/subscription/templates/subscription/fragments/creation_form_existing_user.jinja
+++ b/subscription/templates/subscription/fragments/creation_form_existing_user.jinja
@@ -1,7 +1,7 @@
 <form
   hx-post="{{ url("subscription:fragment-existing-user") }}"
   hx-target="this"
-  hx-disabled-elt="find input[type='submit']"
+  hx-disable="find input[type='submit']"
   hx-swap="outerHTML"
 >
   {% csrf_token %}
diff --git a/subscription/templates/subscription/fragments/creation_form_new_user.jinja b/subscription/templates/subscription/fragments/creation_form_new_user.jinja
index e1c08e28..52351387 100644
--- a/subscription/templates/subscription/fragments/creation_form_new_user.jinja
+++ b/subscription/templates/subscription/fragments/creation_form_new_user.jinja
@@ -1,7 +1,7 @@
 <form
   hx-post="{{ url("subscription:fragment-new-user") }}"
   hx-target="this"
-  hx-disabled-elt="find input[type='submit']"
+  hx-disable="find input[type='submit']"
   hx-swap="outerHTML"
 >
   {% csrf_token %}