diff --git a/app/controllers/concerns/apps_validator.rb b/app/controllers/concerns/apps_validator.rb
index e9480fce..669e1284 100644
--- a/app/controllers/concerns/apps_validator.rb
+++ b/app/controllers/concerns/apps_validator.rb
@@ -58,19 +58,19 @@ def lti_app_url(name)
   end
 
   def lti_icon(app_name)
-    return "http://#{request.host_with_port}#{Rails.configuration.assets.prefix}/icon.svg" if app_name == 'default'
-
     begin
       app = lti_app(app_name)
       uri = URI.parse(app['redirect_uri'].sub('https', 'http'))
       site = "#{uri.scheme}://#{uri.host}#{uri.port != 80 ? ":#{uri.port}" : ''}/"
       path = uri.path.split('/')
-      path_base = "#{(path[0].chomp(' ') == '' ? path[1] : path[0]).gsub('/', '')}/"
+      path_base = "#{(path[0].chomp(' ') == '' ? path[1] : path[0]).gsub('/', '')}/#{app_name}"
+      relative_url_root = Rails.configuration.relative_url_root
+      path_base = relative_url_root[0] == '/' ? relative_url_root[1..] : relative_url_root if app_name == 'default'
     rescue StandardError
       # TODO: handle exception
       logger.error("App #{app_name} is not registered.")
       return
     end
-    "#{site}#{"#{path_base}#{app_name}/assets/icon.svg"}"
+    "#{site}#{"#{path_base}/assets/icon.svg"}"
   end
 end
diff --git a/app/controllers/concerns/deep_link_service.rb b/app/controllers/concerns/deep_link_service.rb
index 07dec346..bafc9c93 100644
--- a/app/controllers/concerns/deep_link_service.rb
+++ b/app/controllers/concerns/deep_link_service.rb
@@ -20,11 +20,17 @@ module DeepLinkService
   include ActiveSupport::Concern
 
   # custom_params are passed as a hash of {'key': 'value'} objects.
-  def deep_link_resource(url, title, custom_params = {})
+  def deep_link_resource(url, title, text, icon, custom_params = {})
     {
       'type' => 'ltiResourceLink',
-      'title' => title,
       'url' => url,
+      'title' => title,
+      'text' => text,
+      'icon' => {
+        "url": icon,
+        "width": 100,
+        "height": 100,
+      },
       'presentation' => {
         'documentTarget' => 'window',
       },
diff --git a/app/controllers/concerns/dynamic_registration_service.rb b/app/controllers/concerns/dynamic_registration_service.rb
index 7e33b30a..7d10ab18 100644
--- a/app/controllers/concerns/dynamic_registration_service.rb
+++ b/app/controllers/concerns/dynamic_registration_service.rb
@@ -45,7 +45,7 @@ def client_registration_request_body(key_token)
            deep_link_request_launch_url(protocol: 'https'),],
       "client_name": t("apps.#{tool}.title"),
       "jwks_uri": jwks_uri,
-      # "logo_uri": 'https://client.example.org/logo.png',
+      "logo_uri": secure_url(lti_icon(params[:app])),
       # "policy_uri": 'https://client.example.org/privacy',
       # "policy_uri#ja": 'https://client.example.org/privacy?lang=ja',
       # "tos_uri": 'https://client.example.org/tos',
diff --git a/app/controllers/message_controller.rb b/app/controllers/message_controller.rb
index 198f4d84..2c41cb64 100644
--- a/app/controllers/message_controller.rb
+++ b/app/controllers/message_controller.rb
@@ -170,7 +170,7 @@ def deep_link
     # Remove the default tool unless working in development mode.
     apps -= ['default'] unless Rails.configuration.developer_mode_enabled
     apps.each do |app|
-      resource = deep_link_resource(openid_launch_url, "My #{app.singularize}", { 'broker_app': app })
+      resource = deep_link_resource(openid_launch_url, "My #{app.singularize}", '', secure_url(lti_icon(app)), { 'broker_app': app })
       deep_link_jwt_message = deep_link_jwt_response(lti_registration_params(@jwt_body['iss']), @jwt_header, @jwt_body, [resource])
       @apps << { app_name: app, deep_link_jwt_message: deep_link_jwt_message }
     end
diff --git a/config/environments/production.rb b/config/environments/production.rb
index cbbbb191..6fbf9853 100755
--- a/config/environments/production.rb
+++ b/config/environments/production.rb
@@ -49,7 +49,7 @@
   # config.assets.css_compressor = :sass
 
   # Do not fallback to assets pipeline if a precompiled asset is missed.
-  config.assets.compile = false
+  config.assets.compile = true
 
   # Enable serving of images, stylesheets, and JavaScripts from an asset server.
   # config.asset_host = 'http://assets.example.com'
diff --git a/config/initializers/assets.rb b/config/initializers/assets.rb
index e9731dae..1f139c59 100755
--- a/config/initializers/assets.rb
+++ b/config/initializers/assets.rb
@@ -28,3 +28,5 @@
 # application.js, application.css, and all non-JS/CSS in the app/assets
 # folder are already added.
 # Rails.application.config.assets.precompile += %w( admin.js admin.css )
+
+Rails.application.config.assets.prefix = '/assets'