diff --git a/duniterpy/key/ascii_armor.py b/duniterpy/key/ascii_armor.py
index 122497ef7beca2eeb456d3131903b2d05b75ed8d..5035d09235bba19efb0871216faaf7143f3d0dbd 100644
--- a/duniterpy/key/ascii_armor.py
+++ b/duniterpy/key/ascii_armor.py
@@ -17,6 +17,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 import base64
 import libnacl
+from libnacl.version import version as libnacl_version
 import re
 from typing import Optional, List, Dict, Any
 
@@ -31,7 +32,7 @@ HEADER_PREFIX = "-----"
 DASH_ESCAPE_PREFIX = "\x2D\x20"
 
 # Version field value
-VERSION_FIELD_VALUE = "Python Libnacl " + libnacl.__version__
+VERSION_FIELD_VALUE = "Python Libnacl " + libnacl_version
 
 # Parser cursor status
 ON_MESSAGE_FIELDS = 1
diff --git a/pyproject.toml b/pyproject.toml
index 10f1be1191a065b667f69035e38b1982cc2761fc..70dfedbe536caac551e72767f591b0a61e21c38d 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -30,7 +30,7 @@ jsonschema = "^3.2.0"
 pypeg2 = "^2.15.2"
 attrs = "^20.2.0"
 base58 = "^2.0.0"
-libnacl = "^1.7.1"
+libnacl = "^1.7.2"
 pyaes = "^1.6.1"
 
 [tool.poetry.dev-dependencies]