diff --git a/pyproject.toml b/pyproject.toml
index d595baf..7b45ecd 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -36,7 +36,6 @@ dynamic = ['version']
 bcrypt    = ['bcrypt >= 3.1.3']
 fido2     = ['fido2 >= 2']
 gssapi    = ['gssapi >= 1.2.0']
-libnacl   = ['libnacl >= 1.4.2']
 pkcs11    = ['python-pkcs11 >= 0.7.0']
 pyOpenSSL = ['pyOpenSSL >= 23.0.0']
 pywin32   = ['pywin32 >= 227']
diff --git a/tox.ini b/tox.ini
index 03d2013..eaf7923 100644
--- a/tox.ini
+++ b/tox.ini
@@ -11,7 +11,6 @@ deps =
     aiofiles>=0.6.0
     bcrypt>=3.1.3
     fido2>=2
-    libnacl>=1.4.2
     pyOpenSSL>=23.0.0
     pytest>=7.0.1
     pytest-cov>=3.0.0