diff --git a/.env.docker b/.env.docker
index 05f2035445..28b1973148 100644
--- a/.env.docker
+++ b/.env.docker
@@ -22,7 +22,7 @@ LOG_CHANNEL=${LOG_CHANNEL}
 
 # Database credentials. Make sure the database exists. I recommend a dedicated user for Firefly III
 # If you use SQLite, set connection to `sqlite` and remove the database, username and password settings.
-DB_CONNECTION=mysql
+DB_CONNECTION=${FF_DB_CONNECTION}
 DB_HOST=${FF_DB_HOST}
 DB_PORT=${FF_DB_PORT}
 DB_DATABASE=${FF_DB_NAME}
diff --git a/app/Http/Middleware/Range.php b/app/Http/Middleware/Range.php
index f7c935ac75..2df70e8f2b 100644
--- a/app/Http/Middleware/Range.php
+++ b/app/Http/Middleware/Range.php
@@ -55,6 +55,9 @@ class Range
 
             // set more view variables:
             $this->configureList();
+
+            // flash a big fat warning when users use SQLite in Docker
+            $this->loseItAll($request);
         }
 
         return $next($request);
@@ -99,6 +102,18 @@ class Range
         View::share('defaultCurrency', $defaultCurrency);
     }
 
+    /**
+     * @param Request $request
+     */
+    private function loseItAll(Request $request)
+    {
+        if (getenv('DB_CONNECTION') === 'sqlite' && getenv('IS_DOCKER') === true) {
+            $request->session()->flash(
+                'error', 'You seem to be using SQLite in a Docker container. Don\'t do this. If the container restarts all your data will be gone.'
+            );
+        }
+    }
+
     /**
      *
      */