diff --git a/src/util/color.py b/src/util/color.py
index dc4c785..bcbef4f 100644
--- a/src/util/color.py
+++ b/src/util/color.py
@@ -4,11 +4,11 @@ from src.util import command
 class Color:
     def get_256_color(color):
         """Get color using tput (256-colors base)"""
-        return command.get_output(f'tput setaf {color}')
+        return command.get_output(f"tput setaf {color}")
 
     def get_special_color(index):
         """Get special colors using tput (like bold, etc..)"""
-        return command.get_output(f'tput {index}')
+        return command.get_output(f"tput {index}")
 
     RED = get_256_color(196)
     BLUE = get_256_color(51)
@@ -17,5 +17,5 @@ class Color:
     GOLD = get_256_color(214)
     GREY = get_256_color(238)
 
-    RESET = get_special_color('sgr0')
-    BOLD = get_special_color('bold')
+    RESET = get_special_color("sgr0")
+    BOLD = get_special_color("bold")
diff --git a/src/util/command.py b/src/util/command.py
index 2aa260b..550414a 100644
--- a/src/util/command.py
+++ b/src/util/command.py
@@ -3,23 +3,23 @@ import subprocess
 
 def execute(command) -> None:
     """Execute bash `command`, return the returncode (int)"""
-    command = command.split(' ')
+    command = command.split(" ")
     subprocess.call(command)
 
 
 def get_output(command) -> str:
     """Get standard output of `command`"""
-    command = command.split(' ')
+    command = command.split(" ")
     return subprocess.run(
         command,
         stderr=subprocess.STDOUT,
         stdout=subprocess.PIPE
-    ).stdout.decode('utf-8')
+    ).stdout.decode("utf-8")
 
 
 def get_return_code(command) -> int:
     """get return code of `command` (int)"""
-    command = command.split(' ')
+    command = command.split(" ")
     return subprocess.run(
         command,
         stderr=subprocess.STDOUT,