diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 9b21785..9ce86f2 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -15,7 +15,7 @@ jobs:
     runs-on: ubuntu-latest
 
     env:
-      PY_VERSION: "3.10"
+      PY_VERSION: "3.11"
 
     steps:
       - uses: actions/checkout@v3
diff --git a/.readthedocs.yaml b/.readthedocs.yaml
index b7ca4ba..15c53be 100644
--- a/.readthedocs.yaml
+++ b/.readthedocs.yaml
@@ -8,7 +8,7 @@ version: 2
 build:
   os: ubuntu-22.04
   tools:
-    python: "3.10"
+    python: "3.11"
 
 # Build documentation in the "docs/" directory with Sphinx
 sphinx:
diff --git a/pyproject.toml b/pyproject.toml
index 2995c0c..01429a6 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -10,7 +10,7 @@ name = "xl2times"
 version = "0.1.0"
 description = 'An open source tool to convert Excel input files for TIMES models to the DD format accepted by GAMS'
 readme = "README.md"
-requires-python = ">=3.10"
+requires-python = ">=3.11"
 license = { file = "LICENSE" }
 keywords = []
 classifiers = [
diff --git a/pyrightconfig.json b/pyrightconfig.json
index d6bcb2c..9cc76bf 100644
--- a/pyrightconfig.json
+++ b/pyrightconfig.json
@@ -9,7 +9,7 @@
   ],
   "reportMissingImports": true,
   "reportMissingTypeStubs": false,
-  "pythonVersion": "3.10",
+  "pythonVersion": "3.11",
   "pythonPlatform": "All",
   "venv": ".venv",
   "venvPath": "."