diff --git a/duniterpy/key/ascii_armor.py b/duniterpy/key/ascii_armor.py
index 77b87242252e9916806629eef5d90941ae1ff59d..c8021dd7c6436f2646812732d967f6e7e5d7c619 100644
--- a/duniterpy/key/ascii_armor.py
+++ b/duniterpy/key/ascii_armor.py
@@ -1,5 +1,6 @@
 import base64
 import libnacl
+from libnacl.version import version as libnacl_version
 import re
 from typing import Optional, List, Dict, Any
 
@@ -14,7 +15,7 @@ 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 df2897ec0958e2868843fd94492ac866483530f3..c18a8d686110dd1a35044f388bb1ffb0047c6af4 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -31,7 +31,7 @@ pypeg2 = "^2.15.2"
 attrs = "^19.3.0"
 base58 = "^2.0.0"
 pylibscrypt = "^1.8.0"
-libnacl = "^1.6.1"
+libnacl = "^1.7.2"
 pyaes = "^1.6.1"
 
 [tool.poetry.dev-dependencies]