diff --git a/server/pyproject.toml b/server/pyproject.toml
index c3406c3..570d763 100644
--- a/server/pyproject.toml
+++ b/server/pyproject.toml
@@ -34,7 +34,7 @@ dependencies = [
   "requests>=2.32.3,<2.33; python_version>='3.8'",
   "twisted>=21.7,<22; python_version<'3.7'",
   "twisted>=22.10,<23; python_version<'3.8'",
-  "twisted>=24.11,<24.12; python_version>='3.8'",
+  "twisted>=24.11,<26.5; python_version>='3.8'",
 ]
 optional-dependencies.metrics = [ "prometheus-client" ]
 optional-dependencies.test = [ "pytest>=8.3,<8.4", "pytest-cov>=6,<7", "testcontainers>=4.8.2,<4.9" ]
diff --git a/server/requirements-ci-py39.txt b/server/requirements-ci-py39.txt
index fb6d198..5c801c3 100644
--- a/server/requirements-ci-py39.txt
+++ b/server/requirements-ci-py39.txt
@@ -1,6 +1,6 @@
 channelfinder @ https://github.com/ChannelFinder/pyCFClient/archive/refs/tags/v3.2.0.zip
 requests==2.32.3
-twisted==24.11.0
+twisted==26.4.0rc2
 pytest==8.3.5
 pytest-cov==6.0.0
 testcontainers==4.8.2