diff --git a/doc/requirements.txt b/doc/requirements.txt
index 728e22d..09e59da 100644
--- a/doc/requirements.txt
+++ b/doc/requirements.txt
@@ -6,5 +6,5 @@ sphinx-rtd-theme
 setuptools
 setuptools-scm
 docutils>=0.12
-sphinxcontrib-spelling>=5
+sphinxcontrib-spelling>=7.2.0
 python-barcode>=0.11.0,<1
diff --git a/tox.ini b/tox.ini
index b93140d..4ab2be5 100644
--- a/tox.ini
+++ b/tox.ini
@@ -27,7 +27,7 @@ passenv = ESCPOS_CAPABILITIES_PICKLE_DIR ESCPOS_CAPABILITIES_FILE CI TRAVIS TRAV
 [testenv:docs]
 basepython = python
 changedir = doc
-deps = sphinx>=1.5.1
+deps = sphinx>=3.0.0
        setuptools_scm
        python-barcode
        sphinxcontrib-spelling>=7.2.0