diff --git a/.github/actions/setup_project/action.yml b/.github/actions/setup_project/action.yml
index 599fa11e..2e590471 100644
--- a/.github/actions/setup_project/action.yml
+++ b/.github/actions/setup_project/action.yml
@@ -24,7 +24,7 @@ runs:
     - name: Install Poetry
       if: steps.cached-poetry.outputs.cache-hit != 'true'
       shell: bash
-      run: curl -sSL https://install.python-poetry.org | python3 -
+      run: curl -sSL https://install.python-poetry.org | python3 - --version 1.8.5
 
     - name: Check pyproject.toml syntax
       shell: bash
diff --git a/docs/tutorial/install.md b/docs/tutorial/install.md
index c3b0756e..d59dfee0 100644
--- a/docs/tutorial/install.md
+++ b/docs/tutorial/install.md
@@ -81,7 +81,7 @@ cd /mnt/<la_lettre_du_disque>/vos/fichiers/comme/dhab
                  libffi-dev python-dev-is-python3 pkg-config \
                  gettext git pipx
 
-        pipx install poetry
+        pipx install poetry==1.8.5
         ```
 
     === "Arch Linux"
@@ -101,7 +101,7 @@ cd /mnt/<la_lettre_du_disque>/vos/fichiers/comme/dhab
     
     ```bash    
     brew install git python pipx npm
-    pipx install poetry
+    pipx install poetry==1.8.5
     
     # Pour bien configurer gettext
     brew link gettext # (suivez bien les instructions supplémentaires affichées)