diff --git a/.github/workflows/ci_workflows.yml b/.github/workflows/ci_workflows.yml
index b60654b1..8d6c62dc 100644
--- a/.github/workflows/ci_workflows.yml
+++ b/.github/workflows/ci_workflows.yml
@@ -41,8 +41,8 @@ jobs:
 
           - name: Try minimum supported versions
             os: ubuntu-latest
-            python: '3.9'
-            toxenv: py39-legacy-test
+            python: '3.10'
+            toxenv: py310-legacy-test
 
     steps:
     - name: Checkout code
diff --git a/poppy/__init__.py b/poppy/__init__.py
index 415d3607..0a3163e6 100644
--- a/poppy/__init__.py
+++ b/poppy/__init__.py
@@ -23,7 +23,7 @@
 except ImportError:
     __version__ = ""
 
-__minimum_python_version__ = "3.9"
+__minimum_python_version__ = "3.10"
 
 
 class UnsupportedPythonError(Exception):
diff --git a/readthedocs.yml b/readthedocs.yml
index 891d88fb..3a5f0788 100644
--- a/readthedocs.yml
+++ b/readthedocs.yml
@@ -9,7 +9,7 @@ version: 2
 build:
   os: ubuntu-22.04
   tools:
-    python: "3.9"
+    python: "3.11"
 
 # Build documentation in the docs/ directory with Sphinx
 sphinx:
@@ -26,4 +26,4 @@ python:
     - method: pip
       path: .
       extra_requirements:
-        - docs
\ No newline at end of file
+        - docs