diff --git a/project.clj b/project.clj
index c134c35..408db4a 100644
--- a/project.clj
+++ b/project.clj
@@ -5,35 +5,36 @@
 
   :dependencies [[org.clojure/clojure "1.8.0"]
                  [org.clojure/clojurescript "1.9.229" :scope "provided"]
-                 [ring/ring-servlet "1.5.0"]
+                 [ring/ring-servlet "1.5.1"]
                  [clj-oauth "1.5.5"]
-                 [ch.qos.logback/logback-classic "1.1.8"]
-                 [re-frame "0.9.1"]
+                 [ch.qos.logback/logback-classic "1.2.2"]
+                 [re-frame "0.9.2"]
                  [cljs-ajax "0.5.8"]
                  [secretary "1.2.3"]
-                 [reagent-utils "0.2.0"]
-                 [reagent "0.6.0"]
+                 [reagent-utils "0.2.1"]
+                 [reagent "0.6.1"]
                  [korma "0.4.3"]
-                 [selmer "1.10.3"]
-                 [markdown-clj "0.9.91"]
-                 [ring-middleware-format "0.7.0"]
-                 [metosin/ring-http-response "0.8.0"]
-                 [bouncer "1.0.0"]
-                 [org.webjars/bootstrap "4.0.0-alpha.5"]
+                 [selmer "1.10.6"]
+                 [markdown-clj "0.9.98"]
+                 [ring-middleware-format "0.7.2"]
+                 [metosin/ring-http-response "0.8.2"]
+                 [bouncer "1.0.1"]
+                 [org.webjars/bootstrap "4.0.0-alpha.6-1"]
                  [org.webjars/font-awesome "4.7.0"]
-                 [org.webjars.bower/tether "1.3.7"]
+                 [org.webjars.bower/tether "1.4.0"]
                  [org.clojure/tools.logging "0.3.1"]
-                 [compojure "1.5.1"]
+                 [compojure "1.5.2"]
+                 [metosin/compojure-api "1.1.10"]
                  [ring-webjars "0.1.1"]
-                 [ring/ring-defaults "0.2.1"]
+                 [ring/ring-defaults "0.2.3"]
                  [luminus/ring-ttl-session "0.3.1"]
                  [mount "0.1.11"]
-                 [cprop "0.1.9"]
+                 [cprop "0.1.10"]
                  [org.clojure/tools.cli "0.3.5"]
-                 [migratus "0.8.32"]
+                 [migratus "0.8.33"]
                  [luminus-nrepl "0.1.4"]
-                 [luminus-migrations "0.2.9"]
-                 [conman "0.6.2"]
+                 [luminus-migrations "0.3.0"]
+                 [conman "0.6.3"]
                  [org.postgresql/postgresql "9.4.1212"]
                  ]
 
@@ -111,16 +112,16 @@
 
    :project/dev  {:dependencies [[prone "1.1.4"]
                                  [ring/ring-mock "0.3.0"]
-                                 [ring/ring-devel "1.5.0"]
+                                 [ring/ring-devel "1.5.1"]
                                  [luminus-jetty "0.1.4"]
                                  [pjstadig/humane-test-output "0.8.1"]
                                  [org.clojure/core.cache "0.6.5"]
-                                 [org.apache.httpcomponents/httpcore "4.4.5"]
+                                 [org.apache.httpcomponents/httpcore "4.4.6"]
                                  [clj-webdriver/clj-webdriver "0.7.2"]
-                                 [org.seleniumhq.selenium/selenium-server "3.0.1"]
+                                 [org.seleniumhq.selenium/selenium-server "3.3.1"]
                                  [doo "0.1.7"]
-                                 [binaryage/devtools "0.8.3"]
-                                 [figwheel-sidecar "0.5.8"]
+                                 [binaryage/devtools "0.9.2"]
+                                 [figwheel-sidecar "0.5.9"]
                                  [com.cemerick/piggieback "0.2.2-SNAPSHOT"]
                                  [directory-naming/naming-java "0.8"]]
                   :plugins      [[com.jakemccrary/lein-test-refresh "0.14.0"]
diff --git a/src/clj/youyesyet/db/schema.clj b/src/clj/youyesyet/db/schema.clj
index c999486..7a6c45b 100644
--- a/src/clj/youyesyet/db/schema.clj
+++ b/src/clj/youyesyet/db/schema.clj
@@ -34,6 +34,26 @@
 ;;;  redundant, and if they are the namespace probably needs to be renamed to 'entities'.
 ;;;  See also resources/migrations/20161014170335-basic-setup.up.sql
 
+(defn create-districts-table!
+  "Create a table to hold the electoral districts in which electors are registered.
+  Note that, as this app is being developed for the independence referendum in which
+  polling is across the whole of Scotland, this part of the design isn't fully thought
+  through; if later adapted to general or local elections, some breakdown or hierarchy
+  of polling districts into constituencies will be required."
+  []
+  (sql/db-do-commands
+    yyydb/*db*
+    (sql/create-table-ddl
+      :districts
+      ;; it may be necessary to have a serial abstract primary key but I suspect
+      ;; polling districts already have numbers assigned by the Electoral Commission and
+      ;; it would be sensible to use those. TODO: check.
+      [:id "integer not null primary key"]
+      [:name "varchar(64) not null"]
+      ;; TODO: it would make sense to hold polygon data for polling districts so we can reflect
+      ;; them on the map, but I haven't thought through how to do that yet.
+      )))
+
 
 (kc/defentity district
   (kc/pk :id)
diff --git a/src/clj/youyesyet/routes/services.clj b/src/clj/youyesyet/routes/services.clj
index e44bb79..c0de2b5 100644
--- a/src/clj/youyesyet/routes/services.clj
+++ b/src/clj/youyesyet/routes/services.clj
@@ -44,4 +44,4 @@
       :return      Long
       :header-params [x :- Long, y :- Long]
       :summary     "x^y with header-parameters"
-      (ok (long (Math/pow x y))))))
+      (ok (long (Math/pow x y)))))))