diff --git a/.github/workflows/install.yml b/.github/workflows/install.yml
index 5015696..65e5c56 100644
--- a/.github/workflows/install.yml
+++ b/.github/workflows/install.yml
@@ -9,7 +9,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ['3.12']
+        python-version: ['3.12', '3.11', '3.10', '3.9']
     steps:
       - name: Set up Python ${{ matrix.python-version }}
         uses: actions/setup-python@v4
diff --git a/.github/workflows/linters.yml b/.github/workflows/linters.yml
index 18dbae5..ba823d6 100644
--- a/.github/workflows/linters.yml
+++ b/.github/workflows/linters.yml
@@ -6,7 +6,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: ['3.12']
+        python-version: ['3.12', '3.11', '3.10', '3.9']
     steps:
       - uses: actions/checkout@v3
 
diff --git a/.github/workflows/safety.yml b/.github/workflows/safety.yml
index b52acff..ef055db 100644
--- a/.github/workflows/safety.yml
+++ b/.github/workflows/safety.yml
@@ -9,7 +9,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ['3.12']
+        python-version: ['3.12', '3.11', '3.10', '3.9']
     steps:
       - uses: actions/checkout@v3
 
diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 26ab317..01f8dfb 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -7,7 +7,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ['3.12']
+        python-version: ['3.12', '3.11', '3.10', '3.9']
     steps:
       - uses: actions/checkout@v3
 
diff --git a/pyproject.toml b/pyproject.toml
index eab24ad..b8851f9 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -7,7 +7,7 @@ homepage = "https://github.com/TankerHQ/identity-python"
 readme = "README.md"
 
 [tool.poetry.dependencies]
-python = "^3.12"
+python = ">=3.9,<4"
 PyNacl = "1.5.0"
 
 [tool.poetry.dev-dependencies]