diff --git a/pyproject.toml b/pyproject.toml
index 28c50c55e..75cd2bbca 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -93,7 +93,7 @@ ngx = [
 
 valve = [
     "pyserial>=3.5,<4",
-    "twisted>=22.8.0,<26",
+    "twisted>=26.4.0,<27",
 ]
 
 [dependency-groups]
diff --git a/uv.lock b/uv.lock
index d5c181af7..55a1f102b 100644
--- a/uv.lock
+++ b/uv.lock
@@ -995,7 +995,7 @@ requires-dist = [
     { name = "tables", specifier = ">=3.10.2,<4" },
     { name = "traits", specifier = ">=7.0.2,<8" },
     { name = "traitsui", specifier = ">=8.0.0,<9" },
-    { name = "twisted", marker = "extra == 'valve'", specifier = ">=22.8.0,<26" },
+    { name = "twisted", marker = "extra == 'valve'", specifier = ">=26.4.0,<27" },
     { name = "typer", specifier = ">=0.26.7,<1" },
     { name = "uncertainties", specifier = ">=3.2.3,<4" },
     { name = "utm", specifier = ">=0.8.1,<1" },
@@ -1482,7 +1482,7 @@ wheels = [
 
 [[package]]
 name = "twisted"
-version = "25.5.0"
+version = "26.4.0"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
     { name = "attrs" },
@@ -1493,9 +1493,9 @@ dependencies = [
     { name = "typing-extensions" },
     { name = "zope-interface" },
 ]
-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]]