diff --git a/_version.py b/_version.py
index c55bfe39..6c946174 100644
--- a/_version.py
+++ b/_version.py
@@ -1,2 +1,2 @@
-__version__ = "1.0.5"
+__version__ = "1.0.6"
 
diff --git a/particles/generators.py b/particles/generators.py
index 5af3cc19..b1084565 100644
--- a/particles/generators.py
+++ b/particles/generators.py
@@ -551,7 +551,7 @@ def __init__(self, psi, rfbucket, sigma_z=None, epsn_z=None):
         else:
             raise ValueError("Can not generate mismatched matched distribution!")
 
-        self.seed = np.random.randint(sys.maxint)
+        self.seed = np.random.randint(np.iinfo(np.int32).max)
 
     def psi_for_emittance_newton_method(self, epsn_z):
         H = self.H