diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index c511e1a..c3bce86 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -16,7 +16,7 @@ jobs:
       with:
         manylinux: auto
         command: build
-        args: --release -o dist
+        args: --release -o dist -i python3.9
     - name: Upload wheels
       uses: actions/upload-artifact@v2
       with:
@@ -66,4 +66,4 @@ jobs:
           MATURIN_PYPI_TOKEN: ${{ secrets.PYPI_API_TOKEN }}
         with:
           command: upload
-          args: --skip-existing *
\ No newline at end of file
+          args: --skip-existing *
diff --git a/Readme.md b/Readme.md
index e172690..4dfd161 100644
--- a/Readme.md
+++ b/Readme.md
@@ -50,7 +50,7 @@ Drag your shape with the mouse and observe a `momentum` based center in grey and
 Requirements:
 
 - Rust Toolchain
-- Python >=3.6
+- Python >=3.7
 
 In a `venv` or conda `env`:
 ```