diff --git a/config/locales/server.en.yml b/config/locales/server.en.yml
index 4a62dc1..dce0f66 100755
--- a/config/locales/server.en.yml
+++ b/config/locales/server.en.yml
@@ -32,7 +32,7 @@ en:
     dfp_target_post_bottom_key_code: "Input custom targeting keys - inventory Level"
     dfp_target_post_bottom_value_code: "Input custom targeting values - inventory Level"
 
-    adsense_publisher_code: "Input your publisher ID"
+    adsense_publisher_code: "Your publisher ID. Enter only the number, excluding 'pub-'."
     adsense_through_trust_level: "Show your ads to users based on trust levels. Users with trust level higher than this value will not see ads."
     adsense_topic_list_top_code: "Enter code of the ad unit to display at topic list top location. This is the number assigned to the ad unit, not the JavaScript code."
     adsense_mobile_topic_list_top_code: "Enter code of the ad unit to display mobile ads at topic list top location. This is the number assigned to the ad unit, not the JavaScript code."
@@ -47,6 +47,7 @@ en:
     adsense_mobile_post_bottom_code: "Enter code of the ad unit to display mobile ads at post bottom location. This is the number assigned to the ad unit, not the JavaScript code."
     adsense_post_bottom_ad_sizes: "Choose your ad sizes"
     adsense_nth_post_code: "Show an ad after every N posts, where N is this value."
+
     amazon_through_trust_level: "Show your ads to users based on trust levels. Users with trust level higher than this value will not see ads."
     amazon_topic_list_top_src_code: "Enter src code to display at topic list top location"
     amazon_topic_list_top_ad_width_code: "Input your ad width"
diff --git a/config/settings.yml b/config/settings.yml
index 3800ec2..5b86a63 100755
--- a/config/settings.yml
+++ b/config/settings.yml
@@ -2,6 +2,7 @@ adsense_plugin:
   adsense_publisher_code:
     client: true
     default: ''
+    regex: '^[\d]*$'
   adsense_through_trust_level:
     client: true
     default: 2
@@ -10,10 +11,12 @@ adsense_plugin:
     client: true
     default: ''
     max: 50
+    regex: '^[\d]*$'
   adsense_mobile_topic_list_top_code:
     client: true
     default: ''
     max: 50
+    regex: '^[\d]*$'
   adsense_topic_list_top_ad_sizes:
     client: true
     default: '728*90 - leaderboard'
@@ -33,10 +36,12 @@ adsense_plugin:
     client: true
     default: ''
     max: 50
+    regex: '^[\d]*$'
   adsense_mobile_topic_above_post_stream_code:
     client: true
     default: ''
     max: 50
+    regex: '^[\d]*$'
   adsense_topic_above_post_stream_ad_sizes:
     client: true
     default: '728*90 - leaderboard'
@@ -56,10 +61,12 @@ adsense_plugin:
     client: true
     default: ''
     max: 50
+    regex: '^[\d]*$'
   adsense_mobile_topic_above_suggested_code:
     client: true
     default: ''
     max: 50
+    regex: '^[\d]*$'
   adsense_topic_above_suggested_ad_sizes:
     client: true
     default: '728*90 - leaderboard'
@@ -79,10 +86,12 @@ adsense_plugin:
     client: true
     default: ''
     max: 50
+    regex: '^[\d]*$'
   adsense_mobile_post_bottom_code:
     client: true
     default: ''
     max: 50
+    regex: '^[\d]*$'
   adsense_post_bottom_ad_sizes:
     client: true
     default: '728*90 - leaderboard'