diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 4d57437..66d706f 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -9,7 +9,7 @@ repos:
       - id: isort
         args: ["--profile", "black"]
   - repo: https://github.com/psf/black
-    rev: 20.8b1
+    rev: 22.3.0
     hooks:
       - id: black
         language_version: python3  
diff --git a/files/helpers.py b/files/helpers.py
index 7e61ffa..1926f28 100644
--- a/files/helpers.py
+++ b/files/helpers.py
@@ -330,7 +330,7 @@ def media_file_info(input_file):
         except ValueError:
             hms, msec = duration_str.split(",")
 
-        total_dur = sum(int(x) * 60 ** i for i, x in enumerate(reversed(hms.split(":"))))
+        total_dur = sum(int(x) * 60**i for i, x in enumerate(reversed(hms.split(":"))))
         video_duration = total_dur + float("0." + msec)
     else:
         # fallback to format, eg for webm
@@ -409,7 +409,7 @@ def media_file_info(input_file):
                 hms, msec = duration_str.split(".")
             except ValueError:
                 hms, msec = duration_str.split(",")
-            total_dur = sum(int(x) * 60 ** i for i, x in enumerate(reversed(hms.split(":"))))
+            total_dur = sum(int(x) * 60**i for i, x in enumerate(reversed(hms.split(":"))))
             audio_duration = total_dur + float("0." + msec)
         else:
             # fallback to format, eg for webm