diff --git a/c_monocypher.pyx b/c_monocypher.pyx
index 01ecafe..ce579c9 100644
--- a/c_monocypher.pyx
+++ b/c_monocypher.pyx
@@ -12,7 +12,7 @@ import warnings
 
 
 # also edit setup.py
-__version__ = '4.0.2.3'   # also change setup.py
+__version__ = '4.0.2.4'   # also change setup.py
 __title__ = 'pymonocypher'
 __description__ = 'Python ctypes bindings to the Monocypher library'
 __url__ = 'https://github.com/jetperch/pymonocypher'
@@ -325,7 +325,7 @@ def argon2i_32(nb_blocks, nb_iterations, password, salt, key=None, ad=None) -> b
 
     cdef crypto_argon2_config config;
     config.algorithm = 1
-    config.nb_block = nb_blocks
+    config.nb_blocks = nb_blocks
     config.nb_passes = nb_iterations
     config.nb_lanes = 1
 
diff --git a/setup.py b/setup.py
index e9bf884..175a5bf 100644
--- a/setup.py
+++ b/setup.py
@@ -11,7 +11,7 @@
 import os
 
 MYPATH = os.path.abspath(os.path.dirname(__file__))
-VERSION = '4.0.2.3'  # also change c_monocypher.pyx
+VERSION = '4.0.2.4'  # also change c_monocypher.pyx
 
 
 try: