diff --git a/.gdb_history b/.gdb_history
new file mode 100644
index 0000000..30f4763
--- /dev/null
+++ b/.gdb_history
@@ -0,0 +1,3 @@
+q
+q
+clear
diff --git a/README.md b/README.md
index 5d84de2..ebf7745 100644
--- a/README.md
+++ b/README.md
@@ -33,7 +33,8 @@ PEDA - Python Exploit Development Assistance for GDB
 
 ```sh
 sudo pacman -S python-six # arch
-sudo apt install python-siz # debian
+sudo apt install python3-six # debian distros
+sudo dnf python3-six dnf # fedodra / Cent / RHEL
 ```
 
 -   clone repository
diff --git a/lib/nasm.py b/lib/nasm.py
index 13888f4..1074730 100644
--- a/lib/nasm.py
+++ b/lib/nasm.py
@@ -82,7 +82,7 @@ def nasm2shellcode(asmcode):
                 return ""
 
             shellcode = []
-            pattern = re.compile("([0-9A-F]{8})\s*([^\s]*)\s*(.*)")
+            pattern = re.compile(r"([0-9A-F]{8})\s*([^\s]*)\s*(.*)")
 
             matches = pattern.findall(asmcode)
             for line in asmcode.splitlines():
diff --git a/lib/utils.py b/lib/utils.py
index 8f2b038..c54e5c4 100644
--- a/lib/utils.py
+++ b/lib/utils.py
@@ -523,7 +523,7 @@ def format_disasm_code(code, nearby=None):
             result += line + "\n"
         else:
             color = style = None
-            m = re.search(".*(0x[^ ]*).*:\s*([^ ]*)", line)
+            m = re.search(r".*(0x[^ ]*).*:\s*([^ ]*)", line)
             if not m: # failed to parse
                 result += line + "\n"
                 continue
@@ -540,7 +540,7 @@ def format_disasm_code(code, nearby=None):
                     break
 
             prefix = line.split(":\t")[0]
-            addr = re.search("(0x[^\s]*)", prefix)
+            addr = re.search(r"(0x[^\s]*)", prefix)
             if addr:
                 addr = to_int(addr.group(1))
             else:
@@ -589,8 +589,7 @@ def cyclic_pattern_charset(charset_type=None):
         charset[2] = "sn()" + charset[2]
 
     if charset_type == 2: # maximum type
-        charset += ['!"#$%&\()*+,-./:;<=>?@[]^_{|}~'] # string.punctuation
-
+        charset += [r'!"#$%&\()*+,-./:;<=>?@[]^_{|}~'] # string.punctuation
     mixed_charset = mixed = ''
     k = 0
     while True: