diff --git a/negromate/web/builder.py b/negromate/web/builder.py
index ff987e9..d1c0fc8 100644
--- a/negromate/web/builder.py
+++ b/negromate/web/builder.py
@@ -20,7 +20,7 @@ class SongPage:
                     srt_str = srtfile.read().encode("utf-8").decode("utf-8-sig")
                     parsed_srt = list(srt.parse(srt_str))
                 except Exception as e:
-                    print("{}: srt parse error: {}".format(self.song.path.name, e))
+                    print(f"{self.song.path.name}: srt parse error: {e}")
         root_path = os.path.relpath(self.song.root, self.song.path)
         return {
             "song": self,
@@ -58,8 +58,7 @@ class Builder:
     def display_boolean(self, value):
         if value:
             return Markup("✓")
-        else:
-            return Markup("✗")
+        return Markup("✗")
 
     def render(self, template, target, context):
         html_file = target / "index.html"
diff --git a/negromate/web/commands/build.py b/negromate/web/commands/build.py
index 2a07c8d..c17e25f 100644
--- a/negromate/web/commands/build.py
+++ b/negromate/web/commands/build.py
@@ -17,28 +17,28 @@ def options(parser, config, **kwargs):
         "--song_folder",
         type=Path,
         default=config["global"]["song_folder"],
-        help="Folder with the song database, defaults to {}".format(config["global"]["song_folder"]),
+        help=f"Folder with the song database, defaults to {config['global']['song_folder']}",
     )
     parser.add_argument(
         "-l",
         "--lyrics_file",
         type=Path,
         default=config["global"]["lyrics_file"],
-        help="File with the lyrics of the songs, defaults to {}".format(config["global"]["lyrics_file"]),
+        help=f"File with the lyrics of the songs, defaults to {config['global']['lyrics_file']}",
     )
     parser.add_argument(
         "-t",
         "--template_folder",
         type=Path,
         default=config["build"]["template_folder"],
-        help="Folder with jinja2 templates, defaults to {}".format(config["build"]["template_folder"]),
+        help=f"Folder with jinja2 templates, defaults to {config['build']['template_folder']}",
     )
     parser.add_argument(
         "-S",
         "--static_folder",
         type=Path,
         default=config["build"]["static_folder"],
-        help="Folder with static content, defaults to {}".format(config["build"]["static_folder"]),
+        help=f"Folder with static content, defaults to {config['build']['static_folder']}",
     )
 
 
diff --git a/negromate/web/commands/ipfs.py b/negromate/web/commands/ipfs.py
index 45b2f7f..4d725c4 100644
--- a/negromate/web/commands/ipfs.py
+++ b/negromate/web/commands/ipfs.py
@@ -21,23 +21,23 @@ def options(parser, config, **kwargs):
         "--song_folder",
         type=Path,
         default=config["global"]["song_folder"],
-        help="Folder with the song database, defaults to {}".format(config["global"]["song_folder"]),
+        help=f"Folder with the song database, defaults to {config['global']['song_folder']}",
     )
     parser.add_argument(
-        "-a", "--api", default=config[name]["api"], help="IPFS API server, defaults to {}.".format(config[name]["api"])
+        "-a", "--api", default=config[name]["api"], help=f"IPFS API server, defaults to {config[name]['api']}."
     )
     parser.add_argument(
         "-r",
         "--realm",
         default=config[name]["realm"],
-        help="IPFS API basic authentication realm, defaults to {}.".format(config[name]["realm"]),
+        help=f"IPFS API basic authentication realm, defaults to {config[name]['realm']}.",
     )
     parser.add_argument(
         "-p",
         "--pinfile",
         default=config[name]["pinfile"],
         type=Path,
-        help="file to store the current ipfs hash, defaults to {}".format(config[name]["pinfile"]),
+        help=f"file to store the current ipfs hash, defaults to {config[name]['pinfile']}",
     )
 
 
@@ -59,7 +59,7 @@ def run(args, **kwargs):
         args.song_folder.expanduser(),
     ]
     new_hash = subprocess.check_output(command).decode("utf-8").strip()
-    logger.info("New hash: {}".format(new_hash))
+    logger.info("New hash: %s", new_hash)
 
     # pin in server
     data = urllib.parse.urlencode(
@@ -68,8 +68,8 @@ def run(args, **kwargs):
             "progress": "false",
         }
     )
-    url = "{}/api/v0/pin/add?{}".format(args.api, data)
-    logger.debug("server pin request: {}".format(url))
+    url = f"{args.api}/api/v0/pin/add?{data}"
+    logger.debug("server pin request: %s", url)
     request = urllib.request.Request(url, method="POST")
     urllib.request.urlopen(request)
     logger.info("Hash pinned on server.")
@@ -81,8 +81,8 @@ def run(args, **kwargs):
             "resolve": "true",
         }
     )
-    url = "{}/api/v0/name/publish?{}".format(args.api, data)
-    logger.debug("server ipns request: {}".format(url))
+    url = f"{args.api}/api/v0/name/publish?{data}"
+    logger.debug("server ipns request: %s", url)
     request = urllib.request.Request(url, method="POST")
     urllib.request.urlopen(request)
     logger.info("IPNS name updated.")
@@ -92,7 +92,7 @@ def run(args, **kwargs):
     if pinfile.exists():
         with pinfile.open() as f:
             previous_hash = f.read()
-        logger.info("Previous hash: {}".format(previous_hash))
+        logger.info("Previous hash: %s", previous_hash)
     else:
         if not pinfile.parent.exists():
             pinfile.parent.mkdir()
@@ -108,7 +108,7 @@ def run(args, **kwargs):
         ]
         result = subprocess.run(command)
         if result.returncode != 0:
-            logger.info("Previous {} hash not removed: {}".format(previous_hash, result.stdout))
+            logger.info("Previous %s hash not removed: %s", previous_hash, result.stdout)
         else:
             logger.info("Previous hash unpinned on local")
 
@@ -118,8 +118,8 @@ def run(args, **kwargs):
                 "arg": previous_hash,
             }
         )
-        url = "{}/api/v0/pin/rm?{}".format(args.api, data)
-        logger.debug("server unpin request: {}".format(url))
+        url = f"{args.api}/api/v0/pin/rm?{data}"
+        logger.debug("server unpin request: %s", url)
         request = urllib.request.Request(url, method="POST")
         urllib.request.urlopen(request)
         logger.info("Previous hash unpinned on server")
diff --git a/negromate/web/commands/rsync.py b/negromate/web/commands/rsync.py
index 34bf6ea..6f4eef3 100644
--- a/negromate/web/commands/rsync.py
+++ b/negromate/web/commands/rsync.py
@@ -18,43 +18,39 @@ def options(parser, config, **kwargs):
         "--song_folder",
         type=Path,
         default=config["global"]["song_folder"],
-        help="Folder with the song database, defaults to {}".format(config["global"]["song_folder"]),
+        help=f"Folder with the song database, defaults to {config['global']['song_folder']}",
     )
     parser.add_argument(
-        "-H", "--host", default=config[name]["host"], help="Target server, defaults to {}.".format(config[name]["host"])
+        "-H", "--host", default=config[name]["host"], help=f"Target server, defaults to {config[name]['host']}."
     )
     parser.add_argument(
         "-u",
         "--user",
         default=config[name]["user"],
-        help="User in the server, defaults to {}.".format(config[name]["user"]),
+        help=f"User in the server, defaults to {config[name]['user']}.",
     )
     parser.add_argument(
         "-p",
         "--port",
         default=config[name]["port"],
         type=int,
-        help="Port of the ssh server, defaults to {}.".format(config[name]["port"]),
+        help=f"Port of the ssh server, defaults to {config[name]['port']}.",
     )
     parser.add_argument(
         "-d",
         "--destination",
         default=config[name]["destination"],
-        help="Folder of the server, defaults to {}".format(config[name]["destination"]),
+        help=f"Folder of the server, defaults to {config[name]['destination']}",
     )
 
 
 def run(args, **kwargs):
     contents = str(args.song_folder.expanduser()) + "/"
-    destination = "{user}@{host}:{folder}".format(
-        user=args.user,
-        host=args.host,
-        folder=args.destination,
-    )
+    destination = f"{args.user}@{args.host}:{args.destination}"
     command = [
         "rsync",
         "-av",
-        "--rsh=ssh -p {}".format(args.port),
+        f"--rsh=ssh -p {args.port}",
         contents,
         destination,
     ]
diff --git a/negromate/web/commands/run.py b/negromate/web/commands/run.py
index c898c0a..6768d97 100644
--- a/negromate/web/commands/run.py
+++ b/negromate/web/commands/run.py
@@ -17,23 +17,21 @@ def options(parser, config, **kwargs):
         "--song_folder",
         type=Path,
         default=config["global"]["song_folder"],
-        help="Folder with the song database, defaults to {}".format(config["global"]["song_folder"]),
+        help=f"Folder with the song database, defaults to {config['global']['song_folder']}",
     )
     parser.add_argument(
         "-p",
         "--port",
         default=config[name]["port"],
         type=int,
-        help="Specify alternate port, defaults to {}".format(config[name]["port"]),
+        help=f"Specify alternate port, defaults to {config[name]['port']}",
     )
     parser.add_argument(
         "--bind",
         "-b",
         default=config[name]["bind"],
         metavar="ADDRESS",
-        help="Specify alternate bind address, defaults to {}".format(
-            config[name]["bind"] or "all interfaces",
-        ),
+        help="Specify alternate bind address, defaults to {config[name]['bind'] or 'all interfaces'}",
     )