diff --git a/README.md b/README.md
index 19cbf85..98be052 100644
--- a/README.md
+++ b/README.md
@@ -181,6 +181,9 @@ In case you want to use client certificates, set the `client_cn` accordingly.
 Copy the example configuration from `config/icinga2.json` into `config/icinga2.local.json`
 and adjust the settings for the Icinga 2 API credentials.
 
+The `icingaweb2` section allows you to specify the Icinga Web 2 URL
+for the iframe widgets. This is read on startup once.
+
 ```
 cp config/icinga2.json config/icinga2.local.json
 ```
@@ -196,6 +199,9 @@ vim config/icinga2.local.json
       "user": "dashing",
       "password": "icinga2ondashingr0xx"
     }
+  },
+  "icingaweb2": {
+    "url": "http://localhost/icingaweb2"
   }
 }
 ```
@@ -214,6 +220,9 @@ explicitly.
       "user": "dashing",
       "pki_path": "pki/"
     }
+  },
+  "icingaweb2": {
+    "url": "http://localhost/icingaweb2"
   }
 }
 ```
@@ -238,6 +247,7 @@ ICINGA2\_API\_USERNAME   | **Optional.** Required for basic auth as username.
 ICINGA2\_API\_PASSWORD   | **Optional.** Required for basic auth as password.
 ICINGA2\_API\_CERT\_PATH | **Optional.** Client certificate path.
 ICINGA2\_API\_NODENAME   | **Optional.** If client certificates do not match the host name, override it.
+ICINGAWEB2\_URL          | **Optional.** Set the Icinga Web 2 Url. Defaults to `http://localhost/icingaweb2`.
 
 > **Note**
 >
diff --git a/config.ru b/config.ru
index 19b7561..1074b5f 100644
--- a/config.ru
+++ b/config.ru
@@ -1,4 +1,5 @@
 require 'dashing'
+require './lib/icinga2'
 
 configure do
   set :auth_token, 'YOUR_AUTH_TOKEN'
@@ -14,6 +15,19 @@ configure do
      # Put any authentication code you want in here.
      # This method is run before accessing any resource.
     end
+
+    # Specify Icinga Web 2 URL
+    # https://github.com/Shopify/dashing/issues/509
+    def getIcingaWeb2Url()
+      # read configuration and try to fetch the correct path
+      icinga = Icinga2.new('config/icinga2.json') # fixed path
+
+      if icinga.icingaweb2_url != nil
+        return icinga.icingaweb2_url
+      else
+        return 'http://192.168.33.5/icingaweb2'
+      end
+    end
   end
 end
 
diff --git a/config/icinga2.json b/config/icinga2.json
index 2d3a02b..e2174aa 100644
--- a/config/icinga2.json
+++ b/config/icinga2.json
@@ -6,5 +6,8 @@
       "user": "dashing",
       "password": "icinga2ondashingr0xx"
     }
+  },
+  "icingaweb2": {
+    "url": "http://localhost/icingaweb2"
   }
 }
diff --git a/dashboards/icinga2.erb b/dashboards/icinga2.erb
index bcaac3e..f5e42bb 100644
--- a/dashboards/icinga2.erb
+++ b/dashboards/icinga2.erb
@@ -44,12 +44,12 @@ $(function() {
       <div data-id="icinga-severity" data-view="List" data-unordered="true" data-title="Problems" style="background-color: #0095bf;"></div>
     </li>
 
-    <!-- Icinga Web 2 iFrame -->
+    <!-- Icinga Web 2 iFrame. getIcingaWeb2Url() is defined in config.ru and reads from config/icinga2*.json -->
     <li data-row="3" data-col="1" data-sizex="2" data-sizey="2">
-      <div data-id="iframe" data-view="Iframe" data-url="http://192.168.33.5/icingaweb2/monitoring/list/hosts?host_problem=1&sort=host_severity&showFullscreen&showCompact"></div>
+      <div data-id="iframe" data-view="Iframe" data-url="<%=getIcingaWeb2Url()%>/monitoring/list/hosts?host_problem=1&sort=host_severity&showFullscreen&showCompact"></div>
     </li>
     <li data-row="3" data-col="3" data-sizex="2" data-sizey="2">
-      <div data-id="iframe" data-view="Iframe" data-url="http://192.168.33.5/icingaweb2/monitoring/list/services?service_problem=1&sort=service_severity&dir=desc&showFullscreen&showCompact"></div>
+      <div data-id="iframe" data-view="Iframe" data-url="<%=getIcingaWeb2Url()%>/monitoring/list/services?service_problem=1&sort=service_severity&dir=desc&showFullscreen&showCompact"></div>
     </li>
   </ul>
 
diff --git a/lib/icinga2.rb b/lib/icinga2.rb
index 387973e..fe8a1a3 100644
--- a/lib/icinga2.rb
+++ b/lib/icinga2.rb
@@ -30,6 +30,7 @@ class Icinga2
   attr_reader :node_name
   attr_reader :app_starttime
   attr_reader :uptime
+  attr_reader :icingaweb2_url
 
   # general stats
   attr_reader :avg_latency
@@ -109,6 +110,9 @@ def getConfEnv()
     @pkiPath = ENV['ICINGA2_API_CERT_PATH']
     @nodeName = ENV['ICINGA2_API_NODENAME']
 
+    # external attribute
+    @icingaweb2_url = ENV['ICINGAWEB2_URL']
+
     # check for the least required variables, the rest is read later on
     if [@host, @port].all? {|value| value.nil? or value == ""}
       raise ArgumentError.new('Required environment variables not found!')
@@ -139,12 +143,25 @@ def getConfFile(configFile)
       if (File.exist?(realConfigFile))
         file = File.read(realConfigFile)
         @config = JSON.parse(file)
-        @host = @config["icinga2"]["api"]["host"]
-        @port = @config["icinga2"]["api"]["port"]
-        @user = @config["icinga2"]["api"]["user"]
-        @password = @config["icinga2"]["api"]["password"]
-        @pkiPath = @config["icinga2"]["api"]["pki_path"]
-        @nodeName = @config['icinga2']['api']['node_name']
+
+        if @config.key? 'icinga2'
+          config_icinga2 = @config['icinga2']
+
+          if config_icinga2.key? 'api'
+            @host = @config["icinga2"]["api"]["host"]
+            @port = @config["icinga2"]["api"]["port"]
+            @user = @config["icinga2"]["api"]["user"]
+            @password = @config["icinga2"]["api"]["password"]
+            @pkiPath = @config["icinga2"]["api"]["pki_path"]
+            @nodeName = @config['icinga2']['api']['node_name']
+          end
+        end
+
+        puts "Reading config" + @config.to_s
+        if @config.key? 'icingaweb2'
+          # external attribute
+          @icingaweb2_url = @config['icingaweb2']['url']
+        end
       else
         @log.warn(sprintf('Config file %s not found! Using default config.', configFile))
         @host = "localhost"
@@ -153,6 +170,9 @@ def getConfFile(configFile)
         @password = "icinga2ondashingr0xx"
         @pkiPath = "pki/"
         @nodeName = nil
+
+        # external attribute
+        @icingaweb2_url = 'http://localhost/icingaweb2'
       end
 
     rescue JSON::ParserError => e