diff --git a/matrix_webhook/app.py b/matrix_webhook/app.py
index fb202ad..6f40386 100644
--- a/matrix_webhook/app.py
+++ b/matrix_webhook/app.py
@@ -18,16 +18,19 @@ async def main(event):
     matrix client login & start web server
     """
     if conf.MATRIX_PW:
-        LOGGER.info(f"Log in {conf.MATRIX_ID=} on {conf.MATRIX_URL=}")
+        msg = f"Log in {conf.MATRIX_ID=} on {conf.MATRIX_URL=}"
+        LOGGER.info(msg)
         await utils.CLIENT.login(conf.MATRIX_PW)
     else:
-        LOGGER.info(f"Restoring log in {conf.MATRIX_ID=} on {conf.MATRIX_URL=}")
+        msg = f"Restoring log in {conf.MATRIX_ID=} on {conf.MATRIX_URL=}"
+        LOGGER.info(msg)
         utils.CLIENT.access_token = conf.MATRIX_TOKEN
 
     server = web.Server(handler.matrix_webhook)
     runner = web.ServerRunner(server)
     await runner.setup()
-    LOGGER.info(f"Binding on {conf.SERVER_ADDRESS=}")
+    msg = f"Binding on {conf.SERVER_ADDRESS=}"
+    LOGGER.info(msg)
     if conf.SERVER_PATH:
         site = web.UnixSite(runner, conf.SERVER_PATH)
     else:
diff --git a/matrix_webhook/handler.py b/matrix_webhook/handler.py
index 5efbf1e..ed40449 100644
--- a/matrix_webhook/handler.py
+++ b/matrix_webhook/handler.py
@@ -17,7 +17,8 @@ async def matrix_webhook(request):
 
     This one handles a POST, checks its content, and forwards it to the matrix room.
     """
-    LOGGER.debug(f"Handling {request=}")
+    msg = f"Handling {request=}"
+    LOGGER.debug(msg)
 
     # healthcheck
     if request.rel_url.path == "/health":
diff --git a/matrix_webhook/utils.py b/matrix_webhook/utils.py
index 4fa379f..724f706 100644
--- a/matrix_webhook/utils.py
+++ b/matrix_webhook/utils.py
@@ -33,14 +33,16 @@ def error_map(resp):
 
 def create_json_response(status, ret):
     """Create a JSON response."""
-    LOGGER.debug(f"Creating json response: {status=}, {ret=}")
+    msg = f"Creating json response: {status=}, {ret=}"
+    LOGGER.debug(msg)
     response_data = {"status": status, "ret": ret}
     return web.json_response(response_data, status=status)
 
 
 async def join_room(room_id):
     """Try to join the room."""
-    LOGGER.debug(f"Join room {room_id=}")
+    msg = f"Join room {room_id=}"
+    LOGGER.debug(msg)
 
     for _ in range(10):
         try:
@@ -55,14 +57,16 @@ async def join_room(room_id):
             else:
                 return None
         except LocalProtocolError as e:
-            LOGGER.error(f"Send error: {e}")
+            msg = f"Send error: {e}"
+            LOGGER.error(msg)
         LOGGER.warning("Trying again")
     return create_json_response(HTTPStatus.GATEWAY_TIMEOUT, "Homeserver not responding")
 
 
 async def send_room_message(room_id, content):
     """Send a message to a room."""
-    LOGGER.debug(f"Sending room message in {room_id=}: {content=}")
+    msg = f"Sending room message in {room_id=}: {content=}"
+    LOGGER.debug(msg)
 
     for _ in range(10):
         try:
@@ -81,6 +85,7 @@ async def send_room_message(room_id, content):
             else:
                 return create_json_response(HTTPStatus.OK, "OK")
         except LocalProtocolError as e:
-            LOGGER.error(f"Send error: {e}")
+            msg = f"Send error: {e}"
+            LOGGER.error(msg)
         LOGGER.warning("Trying again")
     return create_json_response(HTTPStatus.GATEWAY_TIMEOUT, "Homeserver not responding")