diff --git a/varken/iniparser.py b/varken/iniparser.py
index 9de62bf..e241f31 100644
--- a/varken/iniparser.py
+++ b/varken/iniparser.py
@@ -254,7 +254,7 @@ class INIParser(object):
                                                   server_id)
                                 exit(1)
 
-                            maxmind_license_key = env.get(f'VRKN_GLOBAL_MAXMIND_LICENSE_KEY',
+                            maxmind_license_key = env.get('VRKN_GLOBAL_MAXMIND_LICENSE_KEY',
                                                           self.config.get('global', 'maxmind_license_key'))
 
                             server = TautulliServer(id=server_id, url=scheme + url, api_key=apikey,
diff --git a/varken/unifi.py b/varken/unifi.py
index 2c3d5d0..2d792b8 100644
--- a/varken/unifi.py
+++ b/varken/unifi.py
@@ -27,7 +27,7 @@ class UniFiAPI(object):
         post = connection_handler(self.session, req, self.server.verify_ssl, as_is_reply=True)
 
         if not post or not post.cookies.get('unifises'):
-            self.logger.error(f"Could not retrieve session cookie from UniFi Controller")
+            self.logger.error("Could not retrieve session cookie from UniFi Controller")
             return
 
         cookies = {'unifises': post.cookies.get('unifises')}
@@ -39,7 +39,7 @@ class UniFiAPI(object):
         get = connection_handler(self.session, req, self.server.verify_ssl)
 
         if not get:
-            self.logger.error(f"Could not get list of sites from UniFi Controller")
+            self.logger.error("Could not get list of sites from UniFi Controller")
             return
         site = [site['name'] for site in get['data'] if site['name'].lower() == self.server.site.lower()
                 or site['desc'].lower() == self.server.site.lower()]