diff --git a/dosagelib/scraper.py b/dosagelib/scraper.py
index 23f1d2b5c..b0ab299f6 100644
--- a/dosagelib/scraper.py
+++ b/dosagelib/scraper.py
@@ -34,7 +34,7 @@ ARCHIVE_ORG_URL = re.compile(r'https?://web\.archive\.org/web/[^/]*/')
 
 class GeoblockedException(IOError):
     def __init__(self):
-        super().__init__(f'It seems your current location is geo-blocked.')
+        super().__init__('It seems your current location is geo-blocked.')
 
 
 class Scraper(object):
diff --git a/setup.cfg b/setup.cfg
index 458dcff13..130137251 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -60,6 +60,7 @@ dev =
     flake8-2020;python_version>'3.5'
     flake8-coding
     flake8-future-import
+    flake8-no-fstring
     flake8-pytest
     flake8-pytest-style;python_version>'3.5'