diff --git a/doc/conf.py b/doc/conf.py
index 4381304..f7dc802 100644
--- a/doc/conf.py
+++ b/doc/conf.py
@@ -47,6 +47,9 @@ extensions = [
     "sphinxcontrib.spelling",
 ]
 
+# mock the following modules for autodoc
+autodoc_mock_imports = ["qrcode"]
+
 # supress warnings for external images
 suppress_warnings = [
     "image.nonlocal_uri",
diff --git a/tox.ini b/tox.ini
index 0161bce..ad1b518 100644
--- a/tox.ini
+++ b/tox.ini
@@ -30,7 +30,7 @@ setenv = PY_IGNORE_IMPORTMISMATCH=1
 [testenv:docs]
 basepython = python
 changedir = doc
-deps = sphinx>=3.0.0,<7.2
+deps = sphinx>=7.2.3
        setuptools_scm
        python-barcode
        sphinxcontrib-spelling>=7.2.0