diff --git a/blocker b/blocker
old mode 100644
new mode 100755
index 32535bc..dae17c2
Binary files a/blocker and b/blocker differ
diff --git a/blocker.c b/blocker.c
index 3d11f12..d23ad08 100644
--- a/blocker.c
+++ b/blocker.c
@@ -8,7 +8,7 @@
 #define iptables /sbin/iptables
 #define ipset /sbin/ipset
 #define username "simpleguardian"
-#define indexCommand 1  
+#define indexCommand 1
 #define indexIp 2
 
 /**
@@ -65,7 +65,7 @@ int is_already_blocked(char **argv) {
     Returns 0 if not blocked, 1 if already blocked
     */
     char command_check_if_blocked[] = "ipset test simpleguardian %s > /dev/null 2>&1";
-    char *command_check_if_blocked_formatted = (char*)malloc(sizeof(command_check_if_blocked) + sizeof(argv[indexIp]));
+    char *command_check_if_blocked_formatted = (char*)malloc(50 + sizeof(command_check_if_blocked) + sizeof(argv[indexIp]));
     sprintf(command_check_if_blocked_formatted, command_check_if_blocked, argv[indexIp]);
     return system(command_check_if_blocked_formatted) == 0;
 }
@@ -107,7 +107,7 @@ int main(int argc, char **argv){
 
         printf("blocking %s\n", argv[indexIp]);
         char command[] = "ipset add simpleguardian %s > /dev/null 2>&1";
-        char *command_formatted = (char*)malloc(sizeof(command) + sizeof(argv[indexIp]));
+        char *command_formatted = (char*)malloc(50 + sizeof(command) + sizeof(argv[indexIp]));
         sprintf(command_formatted, command, argv[indexIp]);
 
         system(command_formatted);
@@ -122,7 +122,7 @@ int main(int argc, char **argv){
         printf("unblocking %s\n", argv[indexIp]);
 
         char command[] = "ipset del simpleguardian %s > /dev/null 2>&1";
-        char *command_formatted = (char*)malloc(sizeof(command) + sizeof(argv[indexIp]));
+        char *command_formatted = (char*)malloc(50 + sizeof(command) + sizeof(argv[indexIp]));
         sprintf(command_formatted, command, argv[indexIp]);
 
         system(command_formatted);
@@ -130,4 +130,4 @@ int main(int argc, char **argv){
         exit(0);
     }
     help(1);
-}
\ No newline at end of file
+}
diff --git a/build-deb.py b/build-deb.py
index 9a74ef4..5891fe2 100755
--- a/build-deb.py
+++ b/build-deb.py
@@ -152,7 +152,7 @@
 Essential: no
 Section: security
 Priority: optional
-Depends: python3, systemd, python3-pip, python3-venv
+Depends: python3, systemd, python3-pip, python3-venv, iptables, ipset
 Maintainer: Adam Hlaváček
 Installed-Size: %d
 Description: Protection against brute force attacks
diff --git a/simple-guardian.py b/simple-guardian.py
index 9c0f730..3c056e0 100644
--- a/simple-guardian.py
+++ b/simple-guardian.py
@@ -648,7 +648,7 @@ def load_config(dict_src=None, dict_target=None):  # type: (dict, dict) -> None
     :return: None
     """
     if dict_src is None:
-        with open('config.json', 'r') as f:
+        with open('data/config.json', 'r') as f:
             dict_src = json.load(f)
         dict_target = CONFIG
     for k, v in dict_src.items():