diff --git a/src/taoensso/timbre/appenders/3rd_party/sentry.clj b/src/taoensso/timbre/appenders/3rd_party/sentry.clj
index c53b3aa..043ebbc 100644
--- a/src/taoensso/timbre/appenders/3rd_party/sentry.clj
+++ b/src/taoensso/timbre/appenders/3rd_party/sentry.clj
@@ -1,7 +1,5 @@
 (ns taoensso.timbre.appenders.3rd-party.sentry
-  "Sentry appender
-
-  Requires https://github.com/sethtrain/raven-clj"
+  "Sentry appender. Requires https://github.com/sethtrain/raven-clj."
   {:author "Samuel Otter (@samuelotter)"}
   (:require
    [taoensso.encore :as enc]
@@ -9,55 +7,64 @@
    [raven-clj.core :as raven]
    [raven-clj.interfaces :as interfaces]))
 
-(def ^:private levels {:fatal "fatal"
-                       :error "error"
-                       :warn  "warning"
-                       :info  "info"
-                       :debug "debug"
-                       :trace "debug"})
+(def ^:private timbre->sentry-levels
+  {:trace  "debug"
+   :debug  "debug"
+   :info   "info"
+   :warn   "warning"
+   :error  "error"
+   :fatal  "fatal"
+   :report "info"})
 
 (defn sentry-appender
-  "Creates a sentry-appender. Requires the DSN (e.g.
-  \"https://<key>:<secret>@sentry.io/<project>\", see sentry documentation) to
-  be passed in.
+  "Returns a raven-clj Sentry appender.
 
-  opts may contain additional attributes:
+  Requires the DSN (e.g. \"https://<key>:<secret>@sentry.io/<project>\")
+  to be passed in, see Sentry documentation for details.
+
+  Common options:
+    * :tags, :environment, :release, and :modules will be passed to Sentry
+      as attributes, Ref. https://docs.sentry.io/clientdev/attributes/.
+    * :event-fn can be used to modify the raw event before sending it
+      to Sentry."
 
-  * :tags :environment :release :modules will be passed on to sentry as
-  attributes See https://docs.sentry.io/clientdev/attributes/ for more
-  information.
-  * :event-fn can be used to modify the raw even before sending it
-  to sentry.
-  "
   [dsn & [opts]]
   (let [{:keys [event-fn] :or {event-fn identity}} opts
-        base-event (->> (select-keys opts [:tags :environment :release :modules])
-                        (filter (comp not nil? second))
-                        (into {}))]
-       {:enabled?   true
-        :async?     true
-        :min-level  :warn ; Sentry supports info and debug as well but warning
-                          ; is a reasonable default given how sentry works.
-        :rate-limit nil
-        :output-fn  :inherit
-        :fn
-        (fn [data]
-          (let [{:keys [instant level output_ ?err msg_ ?ns-str context]} data
-                event (as-> base-event event
-                        (merge event {:message (force msg_)
-                                      :logger  ?ns-str
-                                      :level   (get levels level :warning)}
-                               (when context
-                                 {:extra context}))
-                        (if ?err
-                          (interfaces/stacktrace event ?err)
-                          event)
-                        (event-fn event))]
-            (raven/capture dsn event)))}))
+        base-event
+        (->> (select-keys opts [:tags :environment :release :modules])
+             (filter (comp not nil? second))
+             (into {}))]
+
+    {:enabled?   true
+     :async?     true
+     :min-level  :warn ; Reasonable default given how Sentry works
+     :rate-limit nil
+     :output-fn  :inherit
+     :fn
+     (fn [data]
+       (let [{:keys [instant level output_ ?err msg_ ?ns-str context]} data
+
+             event
+             (as-> base-event event
+               (merge event
+                 {:message (force msg_)
+                  :logger  ?ns-str
+                  :level   (get timbre->sentry-levels level)}
+
+                 (when context {:extra context}))
+
+               (if ?err
+                 (interfaces/stacktrace event ?err)
+                 event)
+
+               (event-fn event))]
+
+         (raven/capture dsn event)))}))
 
 (comment
-  ;; Create an example appender with default options:
+  ;; Create an example appender with default opts:
   (sentry-appender "https://<key>:<secret>@sentry.io/<project>")
 
-  ;; Create an example appender with default options, but override `:min-level`:
-  (merge (sentry-appender "https://<key>:<secret>@sentry.io/<project>") {:min-level :debug}))
+  ;; Create an example appender with default opts, but override `:min-level`:
+  (merge (sentry-appender "https://<key>:<secret>@sentry.io/<project>")
+    {:min-level :debug}))