diff --git a/handler/lib/agoradesk_py.py b/handler/lib/agoradesk_py.py
index 9664bb0..c8b77d8 100644
--- a/handler/lib/agoradesk_py.py
+++ b/handler/lib/agoradesk_py.py
@@ -61,7 +61,7 @@ class AgoraDesk:
         try:
             text = yield response.content()
         except:  # noqa
-            self.log.error(f"Error with API call")
+            self.log.error("Error with API call")
             return
         try:
             result["response"] = json.loads(text)
diff --git a/handler/lib/transactions.py b/handler/lib/transactions.py
index ff8743d..1efdf5d 100644
--- a/handler/lib/transactions.py
+++ b/handler/lib/transactions.py
@@ -1,3 +1,6 @@
+# Twisted/Klein imports
+from twisted.internet.defer import inlineCallbacks
+
 # Other library imports
 from json import dumps
 from random import choices
@@ -95,7 +98,7 @@ class Transactions(util.Base):
         # Amount is reliable here as it is checked by find_trade, so no need for stored_trade["amount"]
         if float(amount_usd) > float(settings.Agora.AcceptableAltLookupUSD):
             self.log.info("Not checking against amount and currency as amount exceeds MAX")
-            self.irc.sendmsg(f"Not checking against amount and currency as amount exceeds MAX")
+            self.irc.sendmsg("Not checking against amount and currency as amount exceeds MAX")
             # Close here if the amount exceeds the allowable limit for no reference
             self.ux.notify.notify_tx_lookup_failed(currency, amount, reference, "EXCEEDS_MAX")
             return False
@@ -166,6 +169,7 @@ class Transactions(util.Base):
             return False
         return True
 
+    @inlineCallbacks
     def transaction(self, data):
         """
         Store details of transaction and post notifications to IRC.
@@ -252,8 +256,9 @@ class Transactions(util.Base):
         #    self.log.error(f"Cannot release trade {reference}.")
         #    return
 
-        self.release_funds(stored_trade["id"], stored_trade["reference"])
+        yield self.release_funds(stored_trade["id"], stored_trade["reference"])
 
+    @inlineCallbacks
     def release_funds(self, trade_id, reference):
         stored_trade = db.get_ref(reference)
         platform = stored_trade["subclass"]
@@ -267,7 +272,7 @@ class Transactions(util.Base):
             release = self.lbtc.release_funds
             post_message = self.lbtc.api.contact_message_post
 
-        rtrn = release(trade_id)
+        rtrn = yield release(trade_id)
         if rtrn["message"] == "OK":
             post_message(trade_id, "Thanks! Releasing now :)")
         else:
diff --git a/handler/sinks/truelayer.py b/handler/sinks/truelayer.py
index 4cb16b1..51a83ed 100644
--- a/handler/sinks/truelayer.py
+++ b/handler/sinks/truelayer.py
@@ -128,7 +128,7 @@ class TrueLayer(util.Base):
         if self.current_authcode_bank:
             self.tokens[self.current_authcode_bank] = access_token
         else:
-            self.log.error(f"Received an authcode we didn't ask for")
+            self.log.error("Received an authcode we didn't ask for")
             return
         self.log.info(f"Retrieved access/refresh tokens for {self.current_authcode_bank}")
 
diff --git a/handler/ux/commands.py b/handler/ux/commands.py
index 21f4553..9521bb4 100644
--- a/handler/ux/commands.py
+++ b/handler/ux/commands.py
@@ -510,10 +510,10 @@ class IRCCommands(object):
                     msg("Trade or TX invalid")
                     return
                 elif is_released is True:
-                    msg(f"Trade released")
+                    msg("Trade released")
                     return
                 elif is_released is False:
-                    msg(f"Could not release trade")
+                    msg("Could not release trade")
                     return
 
     class anuke(object):
@@ -878,7 +878,7 @@ class IRCCommands(object):
                 account_id = spl[2]
                 account_name = tx.sinks.truelayer.map_account(bank, account_id)
                 if not account_name:
-                    msg(f"Failed to map the account")
+                    msg("Failed to map the account")
                     return
                 msg(f"Mapped account ID {account_id} at bank {bank} to {account_name}")
 
@@ -890,7 +890,7 @@ class IRCCommands(object):
         @staticmethod
         def got_map_account(account_name, account_id, msg):
             if not account_name:
-                msg(f"Failed to map the account")
+                msg("Failed to map the account")
                 return
             msg(f"Mapped account ID {account_id} to {account_name}")