diff --git a/keycloak_collective_portal/config.py b/keycloak_collective_portal/config.py
index 72b3a1d..262e549 100644
--- a/keycloak_collective_portal/config.py
+++ b/keycloak_collective_portal/config.py
@@ -1,6 +1,6 @@
 """Application configuraiton."""
 
-from datetime import timedelta
+import logging
 from os import environ
 from pathlib import Path
 
@@ -29,3 +29,12 @@ TEMPLATE_DIR = Path(".").absolute() / "keycloak_collective_portal" / "templates"
 
 # Theme selection
 APP_THEME = environ.get("APP_THEME", "default")
+
+# Log level
+LOG_LEVEL = environ.get("APP_LOG_LEVEL", "info")
+if LOG_LEVEL == "info":
+    APP_LOG_LEVEL = logging.INFO
+elif LOG_LEVEL == "debug":
+    APP_LOG_LEVEL = logging.DEBUG
+else:
+    APP_LOG_LEVEL = logging.INFO
diff --git a/keycloak_collective_portal/dependencies.py b/keycloak_collective_portal/dependencies.py
index 0605eac..d0110e0 100644
--- a/keycloak_collective_portal/dependencies.py
+++ b/keycloak_collective_portal/dependencies.py
@@ -12,8 +12,10 @@ async def logged_in(request: Request):
     from keycloak_collective_portal.exceptions import RequiresLoginException
 
     user = request.session.get("user")
+
     if not user:
         raise RequiresLoginException
+
     return user
 
 
diff --git a/keycloak_collective_portal/main.py b/keycloak_collective_portal/main.py
index 0628733..4067615 100644
--- a/keycloak_collective_portal/main.py
+++ b/keycloak_collective_portal/main.py
@@ -1,5 +1,7 @@
 """App entrypoint."""
 
+import logging
+
 from fastapi import FastAPI, Request
 from fastapi.responses import HTMLResponse, RedirectResponse
 from fastapi.staticfiles import StaticFiles
@@ -8,6 +10,7 @@ from starlette.exceptions import HTTPException
 from starlette.middleware.sessions import SessionMiddleware
 
 from keycloak_collective_portal.config import (
+    APP_LOG_LEVEL,
     APP_SECRET_KEY,
     APP_THEME,
     REDIS_DB,
@@ -28,6 +31,9 @@ from keycloak_collective_portal.routes import (
     root,
 )
 
+log = logging.getLogger("uvicorn")
+log.setLevel(APP_LOG_LEVEL)
+
 app = FastAPI(docs_url=None, redoc_url=None)
 
 
@@ -60,9 +66,14 @@ app.add_middleware(SessionMiddleware, secret_key=APP_SECRET_KEY)
 app.mount("/static", StaticFiles(directory=STATIC_DIR), name="static")
 
 app.state.oidc = init_oidc()
+log.info("Initialised OpenID Connect client (for Keycloak logins)")
+
 app.state.keycloak = init_keycloak()
+log.info("Initialised Keycloak admin client (for Keycloak REST API)")
+
 app.state.templates = Jinja2Templates(directory=TEMPLATE_DIR)
 app.state.theme = APP_THEME
+app.state.log = log
 
 app.include_router(invite.router)
 app.include_router(oidc.router)
diff --git a/keycloak_collective_portal/routes/invite.py b/keycloak_collective_portal/routes/invite.py
index 4162633..fcb838f 100644
--- a/keycloak_collective_portal/routes/invite.py
+++ b/keycloak_collective_portal/routes/invite.py
@@ -22,6 +22,7 @@ async def invite_keycloak_create(
     username = user["preferred_username"]
 
     new_invite = {"link": str(uuid4()), "time": str(dt.now())}
+    request.app.state.log.info(f"Generated new invite: {new_invite}")
 
     invites = await request.app.state.redis.get(username)
     if invites:
@@ -39,10 +40,13 @@ async def invite_keycloak_delete(
     request: Request, user=Depends(get_user), invites=Depends(get_invites)
 ):
     username = user["preferred_username"]
-
     invite_to_delete = request.query_params.get("invite")
+
     invites = await request.app.state.redis.get(username)
+    request.app.state.log.info(f"Retrieved invites: {invites}")
+
     purged = [i for i in invites if i["link"] != invite_to_delete]
+    request.app.state.log.info(f"Purged invites: {invites}")
 
     await request.app.state.redis.set(user["preferred_username"], purged)
 
diff --git a/keycloak_collective_portal/routes/register.py b/keycloak_collective_portal/routes/register.py
index ee9ec57..17a3388 100644
--- a/keycloak_collective_portal/routes/register.py
+++ b/keycloak_collective_portal/routes/register.py
@@ -82,6 +82,9 @@ def form_keycloak_register(
         )
         request.app.state.keycloak.send_verify_email(user_id=user_id)
     except Exception as exception:
+        request.app.state.log.error(
+            f"Keycloak user registration failed, saw: {exception}"
+        )
         message = json.loads(exception.error_message).get(
             "errorMessage", "Unknown reason!"
         )