diff --git a/algo/dsa.py b/algo/dsa.py
index d423125..78d4190 100644
--- a/algo/dsa.py
+++ b/algo/dsa.py
@@ -85,7 +85,7 @@ def dsa_processing(data, p_value, q_value, x_value, k_value, encrypt):
                 f"Cannot find correct h_value in range(1;{p_value - 1})"
             )
         g_value = pow(h_value, int((p_value - 1) / q_value))
-    open_key = pow(h_value, x_value) % q_value
+    open_key = pow(g_value, x_value) % p_value
 
     if encrypt == "sign":
         return dsa_sign(data, p_value, q_value, x_value, k_value, g_value)
diff --git a/install.py b/install.py
index c47f687..cad4254 100755
--- a/install.py
+++ b/install.py
@@ -1,4 +1,4 @@
-#!/bin/python3
+#!/usr/bin/env python3
 
 """ Install
 
@@ -20,7 +20,7 @@
 
 print("Start installation process")
 
-subprocess.run(["python", "-m", "venv", "crypto_env" ], check=True)
+subprocess.run([sys.executable, "-m", "venv", "crypto_env" ], check=True)
 
 if platform.system() == "Linux":
     subprocess.run(["crypto_env/bin/pip3", "install", "-r", "linux_requirements.txt"], check=True)