diff --git a/project.clj b/project.clj
index d106a9f..d69830c 100644
--- a/project.clj
+++ b/project.clj
@@ -16,6 +16,7 @@
                  [com.taoensso/encore "2.91.1"]
                  [lib-noir "0.9.9" :exclusions [org.clojure/tools.reader]]
                  [com.cemerick/url "0.1.1"]
+                 [ring/ring-anti-forgery "1.1.0"]
                  [ring-server "0.4.0"]
                  [selmer "1.10.9"]
                  [org.clojure/tools.logging "0.4.0"]
diff --git a/resources/templates/auth.html b/resources/templates/auth.html
index abb8385..87ffbe2 100644
--- a/resources/templates/auth.html
+++ b/resources/templates/auth.html
@@ -2,6 +2,7 @@
 {% block content %}
         <div id="content" class="auth">
           <form action="{{servlet-context}}/auth" method="POST">
+            {% csrf-field %}
             <input type="hidden" name="redirect-to" value="{{redirect-to}}"/>
             {% if user %}
             <p class="widget">
diff --git a/resources/templates/edit-css.html b/resources/templates/edit-css.html
index 80037d1..bd5b50f 100644
--- a/resources/templates/edit-css.html
+++ b/resources/templates/edit-css.html
@@ -3,6 +3,7 @@
 {% block content %}
         <div id="content" class="edit">
             <form action="{{servlet-context}}/edit-css" method="POST">
+                {% csrf-field %}
                 <input type="hidden" name="page" value="{{page}}"/>
                 <textarea name="src" id="src" rows="25" cols="80">{{content}}</textarea>
                 <p class="widget">
diff --git a/resources/templates/edit-user.html b/resources/templates/edit-user.html
index a99d1dd..7a41dd8 100644
--- a/resources/templates/edit-user.html
+++ b/resources/templates/edit-user.html
@@ -3,6 +3,7 @@
 {% block content %}
         <div id="content" class="edit">
             <form action="{{servlet-context}}/edit-user" method="POST">
+                {% csrf-field %}
                 <p class="widget">
                     <label for="target">{{config.username-prompt}}</label>
                     <input type="text" name="target" id="target" value="{{target}}" required {% ifunequal target "" %}disabled{% endifunequal %}/>
diff --git a/resources/templates/edit.html b/resources/templates/edit.html
index a5672a7..39496eb 100644
--- a/resources/templates/edit.html
+++ b/resources/templates/edit.html
@@ -7,6 +7,7 @@
 {% block content %}
         <div id="content" class="edit">
             <form action="{{servlet-context}}/edit" method="POST">
+                {% csrf-field %}
                 <input type="hidden" name="page" value="{{page}}"/>
                 <textarea name="src" id="src" rows="25" cols="80">{{content}}</textarea>
                 <p class="widget">
diff --git a/resources/templates/passwd.html b/resources/templates/passwd.html
index b316475..e7fd0f0 100644
--- a/resources/templates/passwd.html
+++ b/resources/templates/passwd.html
@@ -2,6 +2,7 @@
 {% block content %}
         <div id="content" class="auth">
             <form action="{{servlet-context}}/passwd" method="POST">
+                {% csrf-field %}
                 <p class="widget">
                     <label for="oldpass">{{config.old-pass-prompt}}</label>
                     <input name="oldpass" id="oldpass" type="password" required/>
diff --git a/resources/templates/upload.html b/resources/templates/upload.html
index 47c1555..6533878 100644
--- a/resources/templates/upload.html
+++ b/resources/templates/upload.html
@@ -19,6 +19,7 @@
           {% endif %}
         {% else %}
             <form action="{{servlet-context}}/upload" enctype="multipart/form-data" method="POST">
+                {% csrf-field %}
                 <p class="widget">
                     <label for="upload">{{config.file-upload-prompt}}</label>
                     <input name="upload" id="upload" type="file" required/>
diff --git a/src/smeagol/layout.clj b/src/smeagol/layout.clj
index 8157d3c..cd72809 100644
--- a/src/smeagol/layout.clj
+++ b/src/smeagol/layout.clj
@@ -4,6 +4,7 @@
   smeagol.layout
   (:require [selmer.parser :as parser]
             [clojure.string :as s]
+            [ring.util.anti-forgery :refer [anti-forgery-field]]
             [ring.util.response :refer [content-type response]]
             [compojure.response :refer [Renderable]]
             [environ.core :refer [env]]
@@ -34,6 +35,8 @@
 
 (def template-path "templates/")
 
+(parser/add-tag! :csrf-field (fn [_ _] (anti-forgery-field)))
+
 
 (deftype RenderableTemplate [template params]
   Renderable
diff --git a/src/smeagol/middleware.clj b/src/smeagol/middleware.clj
index 7e047d0..ecf835c 100644
--- a/src/smeagol/middleware.clj
+++ b/src/smeagol/middleware.clj
@@ -5,6 +5,7 @@
             [environ.core :refer [env]]
             [selmer.middleware :refer [wrap-error-page]]
             [prone.middleware :refer [wrap-exceptions]]
+            [ring.middleware.anti-forgery :refer [wrap-anti-forgery]]
             [noir-exception.core :refer [wrap-internal-error]]))
 
 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
@@ -39,11 +40,13 @@
 
 (def development-middleware
   [wrap-error-page
-   wrap-exceptions])
+   wrap-exceptions
+   wrap-anti-forgery])
 
 
 (def production-middleware
-  [#(wrap-internal-error % :log (fn [e] (timbre/error e)))])
+  [#(wrap-internal-error % :log (fn [e] (timbre/error e)))
+   wrap-anti-forgery])
 
 
 (defn load-middleware []
diff --git a/src/smeagol/routes/wiki.clj b/src/smeagol/routes/wiki.clj
index 614f515..f921aad 100644
--- a/src/smeagol/routes/wiki.clj
+++ b/src/smeagol/routes/wiki.clj
@@ -7,7 +7,6 @@
             [cemerick.url :refer (url url-encode url-decode)]
             [compojure.core :refer :all]
             [clj-jgit.porcelain :as git]
-            [environ.core :refer [env]]
             [noir.io :as io]
             [noir.response :as response]
             [noir.util.route :as route]
@@ -46,18 +45,10 @@
 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
 
 
-
-(def content-dir
-  (or
-    (env :smeagol-content-dir)
-    (cjio/file (io/resource-path) "content")))
-
-
-
 (defn get-git-repo
   "Get the git repository for my content, creating it if necessary"
   []
-  (hist/load-or-init-repo content-dir))
+  (hist/load-or-init-repo util/content-dir))
 
 
 (defn process-source
@@ -67,7 +58,7 @@
   (let [source-text (:src params)
         page (:page params)
         file-name (str page suffix)
-        file-path (cjio/file content-dir file-name)
+        file-path (cjio/file util/content-dir file-name)
         exists? (.exists (cjio/as-file file-path))
         git-repo (get-git-repo)
         user (session/get :user)
@@ -96,7 +87,7 @@
          src-text (:src params)
          page (or (:page params) default)
          file-name (str page suffix)
-         file-path (cjio/file content-dir file-name)
+         file-path (cjio/file util/content-dir file-name)
          exists? (.exists (cjio/as-file file-path))
          user (session/get :user)]
      (if (not exists?)
@@ -105,10 +96,10 @@
      (cond src-text (process-source params suffix request)
            true
            (layout/render template
-                          (merge (util/standard-params request content-dir)
+                          (merge (util/standard-params request)
                                  {:title (str (util/get-message :edit-title-prefix request) " " page)
                                   :page page
-                                  :side-bar (md->html (slurp (cjio/file content-dir side-bar)))
+                                  :side-bar (md->html (slurp (cjio/file util/content-dir side-bar)))
                                   :content (if exists? (slurp file-path) "")
                                   :exists exists?}))))))
 
@@ -125,13 +116,13 @@
   (let [params (keywordize-keys (:params request))
         page (or (:page params) (util/get-message :default-page-title request))
         file-name (str page ".md")
-        file-path (cjio/file content-dir file-name)
+        file-path (cjio/file util/content-dir file-name)
         exists? (.exists (clojure.java.io/as-file file-path))]
     (cond exists?
           (do
             (timbre/info (format "Showing page '%s' from file '%s'" page file-path))
             (layout/render "wiki.html"
-                           (merge (util/standard-params request content-dir)
+                           (merge (util/standard-params request)
                                   {:title page
                                    :page page
                                    :content (md->html (slurp file-path))
@@ -146,10 +137,10 @@
   (let [params (keywordize-keys (:params request))
         page (url-decode (or (:page params) (util/get-message :default-page-title request)))
         file-name (str page ".md")
-        repo-path content-dir]
+        repo-path util/content-dir]
     (timbre/info (format "Showing history of page '%s'" page))
     (layout/render "history.html"
-                   (merge (util/standard-params request content-dir)
+                   (merge (util/standard-params request)
                           {:title (str "History of " page)
                            :page page
                            :history (hist/find-history repo-path file-name)}))))
@@ -162,7 +153,7 @@
         upload (:upload params)
         uploaded (if upload (ul/store-upload params))]
     (layout/render "upload.html"
-                   (merge (util/standard-params request content-dir)
+                   (merge (util/standard-params request)
                           {:title (util/get-message :file-upload-title request)
                            :uploaded uploaded
                            :is-image (and
@@ -184,10 +175,10 @@
         page (url-decode (or (:page params) (util/get-message :default-page-title request)))
         version (:version params)
         file-name (str page ".md")
-        content (hist/fetch-version content-dir file-name version)]
+        content (hist/fetch-version util/content-dir file-name version)]
     (timbre/info (format "Showing version '%s' of page '%s'" version page))
     (layout/render "wiki.html"
-                   (merge (util/standard-params request content-dir)
+                   (merge (util/standard-params request)
                           {:title (str (util/get-message :vers-col-hdr request) " " version " of " page)
                            :page page
                            :content (md->html content)}))))
@@ -202,10 +193,10 @@
         file-name (str page ".md")]
     (timbre/info (format "Showing diff between version '%s' of page '%s' and current" version page))
     (layout/render "wiki.html"
-                   (merge (util/standard-params request content-dir)
+                   (merge (util/standard-params request)
                           {:title (str (util/get-message :diff-title-prefix request)" " version " of " page)
                            :page page
-                           :content (d2h/diff2html (hist/diff content-dir file-name version))}))))
+                           :content (d2h/diff2html (hist/diff util/content-dir file-name version))}))))
 
 
 (defn auth-page
@@ -229,7 +220,7 @@
        (response/redirect redirect-to))
      true
      (layout/render "auth.html"
-                   (merge (util/standard-params request content-dir)
+                   (merge (util/standard-params request)
                     {:title (if user (str (util/get-message :logout-link request) " " user) (util/get-message :login-link request))
                      :redirect-to ((:headers request) "referer")})))))
 
@@ -246,7 +237,7 @@
                    (auth/evaluate-password pass1 pass2)
                    (auth/change-pass user oldpass pass2))]
     (layout/render "passwd.html"
-                   (merge (util/standard-params request content-dir)
+                   (merge (util/standard-params request)
                           {:title (str (util/get-message :chpass-title-prefix request) " " user)
                            :message (if changed? (util/get-message :chpass-success request))
                            :error (cond
diff --git a/src/smeagol/util.clj b/src/smeagol/util.clj
index 5fb0092..6e48e73 100644
--- a/src/smeagol/util.clj
+++ b/src/smeagol/util.clj
@@ -1,9 +1,10 @@
 (ns ^{:doc "Miscellaneous utility functions supporting Smeagol."
       :author "Simon Brooke"}
   smeagol.util
-  (:require [noir.session :as session]
-            [clojure.java.io :as cljio]
+  (:require [clojure.java.io :as cjio]
+            [environ.core :refer [env]]
             [noir.io :as io]
+            [noir.session :as session]
             [scot.weft.i18n.core :as i18n]
             [smeagol.authenticate :as auth]
             [smeagol.configuration :refer [config]]
@@ -33,14 +34,20 @@
 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
 
 
+(def content-dir
+  (or
+    (env :smeagol-content-dir)
+    (cjio/file (io/resource-path) "content")))
+
+
 (defn standard-params
   "Return a map of standard parameters to pass to the template renderer."
-  [request content-dir]
+  [request]
   (let [user (session/get :user)]
     {:user user
      :admin (auth/get-admin user)
-     :side-bar (md->html (slurp (cljio/file content-dir "_side-bar.md")))
-     :header (md->html (slurp (cljio/file content-dir "_header.md")))
+     :side-bar (md->html (slurp (cjio/file content-dir "_side-bar.md")))
+     :header (md->html (slurp (cjio/file content-dir "_header.md")))
      :version (System/getProperty "smeagol.version")}))
 
 
@@ -51,7 +58,7 @@
   (merge
     (i18n/get-messages
       ((:headers request) "accept-language")
-      (.getAbsolutePath (cljio/file  (io/resource-path) ".." "i18n"))
+      (.getAbsolutePath (cjio/file  (io/resource-path) ".." "i18n"))
       "en-GB")
     config))