diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 626353b..df5b88b 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -14,7 +14,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ["3.11", "3.12", "3.13", "3.14", "3.15"]
+        python-version: ["3.14", "3.15"]
 
     steps:
       - uses: actions/checkout@v7
diff --git a/Dockerfile b/Dockerfile
index 94359d2..a02327f 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM python:3.14-slim
+FROM python:3.15-slim
 
 ENV PYTHONUNBUFFERED=1
 
diff --git a/readme.rst b/readme.rst
index 93d99b8..b07ca62 100644
--- a/readme.rst
+++ b/readme.rst
@@ -63,7 +63,7 @@ Configuration variables, set in the cabotage UI:
 Requirements and dependencies
 =============================
 
-- Python 3.11+
+- Python 3.14+
 - aiohttp
 - aiohttp-jinja2
 - gidgethub >= 5.0.0
diff --git a/runtime.txt b/runtime.txt
deleted file mode 100644
index 250d1e3..0000000
--- a/runtime.txt
+++ /dev/null
@@ -1 +0,0 @@
-python-3.10.2
diff --git a/tox.ini b/tox.ini
index 9438956..eeb8fde 100644
--- a/tox.ini
+++ b/tox.ini
@@ -2,7 +2,7 @@
 requires =
     tox>=4.2
 env_list =
-    py{315, 314, 313, 312, 311}
+    py{315, 314}
 
 [testenv]
 deps =