diff --git a/pyproject.toml b/pyproject.toml
index c08584a7c..c5465f1cf 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -116,7 +116,7 @@ dependencies = [
     "django-tinymce>=5.0.0",
     "crispy-bootstrap5>=2026.3",
     "crispy-bootstrap3>=2022.1",
-    "twisted[http2,tls]>=25.5.0",
+    "twisted[http2,tls]>=26.4.0",
     "django-dbtemplates-iplweb>=4.3.2",
     "django-soft-delete>=1.0.23",
     "tqdm>=4.67.3",
diff --git a/uv.lock b/uv.lock
index 89a5ef2ee..fff7e66e8 100644
--- a/uv.lock
+++ b/uv.lock
@@ -495,7 +495,7 @@ requires-dist = [
     { name = "testcontainers", extras = ["postgres"], marker = "extra == 'baseline-rebuild'", specifier = ">=4.14.2" },
     { name = "thefuzz", specifier = ">=0.22.1" },
     { name = "tqdm", specifier = ">=4.67.3" },
-    { name = "twisted", extras = ["http2", "tls"], specifier = ">=25.5.0" },
+    { name = "twisted", extras = ["http2", "tls"], specifier = ">=26.4.0" },
     { name = "unidecode", specifier = ">=1.3,<2" },
     { name = "urllib3", specifier = ">=2.7.0,<3.0.0" },
     { name = "uvicorn", extras = ["standard"], specifier = ">=0.46.0" },
@@ -5508,7 +5508,7 @@ wheels = [
 
 [[package]]
 name = "twisted"
-version = "25.5.0"
+version = "26.4.0"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
     { name = "attrs", marker = "platform_python_implementation != 'PyPy'" },
@@ -5519,9 +5519,9 @@ dependencies = [
     { name = "typing-extensions", marker = "platform_python_implementation != 'PyPy'" },
     { name = "zope-interface", marker = "platform_python_implementation != 'PyPy'" },
 ]
-sdist = { url = "https://files.pythonhosted.org/packages/13/0f/82716ed849bf7ea4984c21385597c949944f0f9b428b5710f79d0afc084d/twisted-25.5.0.tar.gz", hash = "sha256:1deb272358cb6be1e3e8fc6f9c8b36f78eb0fa7c2233d2dbe11ec6fee04ea316", size = 3545725, upload-time = "2025-06-07T09:52:24.858Z" }
+sdist = { url = "https://files.pythonhosted.org/packages/db/97/6e9beb1e78247ae6dc34114f27d538cf2cb183c4afcd3609dfdf2b0439c8/twisted-26.4.0.tar.gz", hash = "sha256:dbfd0fe1ee409d0243fdd7a6a6ff14f4948cec1fd78e0376291f805e1501fae9", size = 3575095, upload-time = "2026-05-11T11:24:51.861Z" }
 wheels = [
-    { url = "https://files.pythonhosted.org/packages/eb/66/ab7efd8941f0bc7b2bd555b0f0471bff77df4c88e0cc31120c82737fec77/twisted-25.5.0-py3-none-any.whl", hash = "sha256:8559f654d01a54a8c3efe66d533d43f383531ebf8d81d9f9ab4769d91ca15df7", size = 3204767, upload-time = "2025-06-07T09:52:21.428Z" },
+    { url = "https://files.pythonhosted.org/packages/a6/57/bcf4e2370dd218c9aa68a9140a65d86729c73f1d529f7e94786c2766fc72/twisted-26.4.0-py3-none-any.whl", hash = "sha256:dc25ea0ebf6511c24f03232ee9f4afa54b291c5d897990e3a39cc4d14a1ef4c0", size = 3230362, upload-time = "2026-05-11T11:24:49.5Z" },
 ]
 
 [package.optional-dependencies]