diff --git a/src/apps.json b/src/apps.json
index afe39343f..092aeb39a 100644
--- a/src/apps.json
+++ b/src/apps.json
@@ -5391,14 +5391,16 @@
       "script": "/js/al/common\\.js\\?[0-9_]+",
       "website": "http://liveinternet.ru/rating/"
     },
-    "Lo-dash": {
+    "Lodash": {
       "cats": [
         12
       ],
       "icon": "Lo-dash.png",
       "js": {
-        "_.VERSION": "(.*)\\;version:\\1"
+        "_.differenceBy": "",
+        "_.VERSION": "(.*)\\;confidence:0\\;version:\\1"
       },
+			"excludes": "Underscore.js",
       "script": "lodash.*\\.js",
       "website": "http://www.lodash.com"
     },
@@ -10041,8 +10043,10 @@
       ],
       "icon": "Underscore.js.png",
       "js": {
+        "_.restArguments": "",
         "_.VERSION": "(.*)\\;version:\\1"
       },
+			"exludes": "Lodash",
       "script": "underscore.*\\.js(?:\\?ver=([\\d.]+))?\\;version:\\1",
       "website": "http://underscorejs.org"
     },
diff --git a/src/wappalyzer.js b/src/wappalyzer.js
index c2c26c4cc..7735819d9 100644
--- a/src/wappalyzer.js
+++ b/src/wappalyzer.js
@@ -333,7 +333,7 @@ class Wappalyzer {
 
             // Apply app confidence to implied app
             Object.keys(app.confidence).forEach(id => {
-              apps[implied.string].confidence[id + ' implied by ' + appName] = app.confidence[id] * ( implied.confidence ? implied.confidence / 100 : 1 );
+              apps[implied.string].confidence[id + ' implied by ' + appName] = app.confidence[id] * ( implied.confidence === undefined ? 1 : implied.confidence / 100 );
             });
           });
         }
@@ -568,7 +568,7 @@ class Wappalyzer {
     app.detected = true;
 
     // Set confidence level
-    app.confidence[type + ' ' + ( key ? key + ' ' : '' ) + pattern.regex] = pattern.confidence || 100;
+    app.confidence[type + ' ' + ( key ? key + ' ' : '' ) + pattern.regex] = pattern.confidence === undefined ? 100 : pattern.confidence;
 
     // Detect version number
     if ( pattern.version ) {