diff --git a/test/validators.js b/test/validators.js
index 4cf642c24..e09ede4da 100644
--- a/test/validators.js
+++ b/test/validators.js
@@ -567,7 +567,7 @@ describe('Validators', function () {
             ]
         });
     });
-    
+
     it('should validate decimal numbers', function () {
         test({
             validator: 'isDecimal'
@@ -588,6 +588,9 @@ describe('Validators', function () {
           , invalid: [
                 '....'
               , ' '
+              , ''
+              , '-'
+              , '+'
               , '.'
               , '0.1a'
               , 'a'
diff --git a/validator.js b/validator.js
index 8d2d155e5..e88af387e 100644
--- a/validator.js
+++ b/validator.js
@@ -64,7 +64,7 @@
       , int = /^(?:[-+]?(?:0|[1-9][0-9]*))$/
       , float = /^(?:[-+]?(?:[0-9]+))?(?:\.[0-9]*)?(?:[eE][\+\-]?(?:[0-9]+))?$/
       , hexadecimal = /^[0-9A-F]+$/i
-      , decimal = /^[-+]?[0-9]*(\.[0-9]+)?$/
+      , decimal = /^[-+]?([0-9]+|\.[0-9]+|[0-9]+\.[0-9]+)$/
       , hexcolor = /^#?([0-9A-F]{3}|[0-9A-F]{6})$/i;
 
     var ascii = /^[\x00-\x7F]+$/
@@ -394,9 +394,9 @@
     validator.isNumeric = function (str) {
         return numeric.test(str);
     };
-    
+
     validator.isDecimal = function (str) {
-        return decimal.test(str);
+        return str !== '' && decimal.test(str);
     };
 
     validator.isHexadecimal = function (str) {
diff --git a/validator.min.js b/validator.min.js
index d7601031d..cb493591b 100644
--- a/validator.min.js
+++ b/validator.min.js
@@ -20,4 +20,4 @@
  * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  */
-!function(t,e){"undefined"!=typeof exports&&"undefined"!=typeof module?module.exports=e():"function"==typeof define&&"object"==typeof define.amd?define(e):this[t]=e()}("validator",function(t){"use strict";function e(t,e){t=t||{};for(var r in e)"undefined"==typeof t[r]&&(t[r]=e[r]);return t}function r(t){var e="(\\"+t.symbol.replace(/\./g,"\\.")+")"+(t.require_symbol?"":"?"),r="-?",n="[1-9]\\d*",i="[1-9]\\d{0,2}(\\"+t.thousands_separator+"\\d{3})*",o=["0",n,i],u="("+o.join("|")+")?",s="(\\"+t.decimal_separator+"\\d{2})?",a=u+s;return t.allow_negatives&&!t.parens_for_negatives&&(t.negative_sign_after_digits?a+=r:t.negative_sign_before_digits&&(a=r+a)),t.allow_negative_sign_placeholder?a="( (?!\\-))?"+a:t.allow_space_after_symbol?a=" ?"+a:t.allow_space_after_digits&&(a+="( (?!$))?"),t.symbol_after_digits?a+=e:a=e+a,t.allow_negatives&&(t.parens_for_negatives?a="(\\("+a+"\\)|"+a+")":t.negative_sign_before_digits||t.negative_sign_after_digits||(a=r+a)),new RegExp("^(?!-? )(?=.*\\d)"+a+"$")}t={version:"4.0.1"};var n=/^((([a-z]|\d|[!#\$%&'\*\+\-\/=\?\^_`{\|}~])+(\.([a-z]|\d|[!#\$%&'\*\+\-\/=\?\^_`{\|}~])+)*)|"(\s*(([\x01-\x08\x0b\x0c\x0e-\x1f\x7f]|\x21|[\x23-\x5b]|[\x5d-\x7e])|(\\[\x01-\x09\x0b\x0c\x0d-\x7f])))*\s*")$/i,i=/^((([a-z]|\d|[!#\$%&'\*\+\-\/=\?\^_`{\|}~]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])+(\.([a-z]|\d|[!#\$%&'\*\+\-\/=\?\^_`{\|}~]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])+)*)|"(\s*(([\x01-\x08\x0b\x0c\x0e-\x1f\x7f]|\x21|[\x23-\x5b]|[\x5d-\x7e]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(\\([\x01-\x09\x0b\x0c\x0d-\x7f]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF]))))*\s*")$/i,o=/^(?:[a-z]|\d|[!#\$%&'\*\+\-\/=\?\^_`{\|}~\.]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])+(?:[a-z]|\d|[!#\$%&'\*\+\-\/=\?\^_`{\|}~\.]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF]|\s)*<(.+)>$/i,u=/^(?:4[0-9]{12}(?:[0-9]{3})?|5[1-5][0-9]{14}|6(?:011|5[0-9][0-9])[0-9]{12}|3[47][0-9]{13}|3(?:0[0-5]|[68][0-9])[0-9]{11}|(?:2131|1800|35\d{3})\d{11})$/,s=/^[A-Z]{2}[0-9A-Z]{9}[0-9]$/,a=/^(?:[0-9]{9}X|[0-9]{10})$/,l=/^(?:[0-9]{13})$/,f=/^(\d+)\.(\d+)\.(\d+)\.(\d+)$/,c=/^[0-9A-F]{1,4}$/i,F={3:/^[0-9A-F]{8}-[0-9A-F]{4}-3[0-9A-F]{3}-[0-9A-F]{4}-[0-9A-F]{12}$/i,4:/^[0-9A-F]{8}-[0-9A-F]{4}-4[0-9A-F]{3}-[89AB][0-9A-F]{3}-[0-9A-F]{12}$/i,5:/^[0-9A-F]{8}-[0-9A-F]{4}-5[0-9A-F]{3}-[89AB][0-9A-F]{3}-[0-9A-F]{12}$/i,all:/^[0-9A-F]{8}-[0-9A-F]{4}-[0-9A-F]{4}-[0-9A-F]{4}-[0-9A-F]{12}$/i},p=/^[A-Z]+$/i,g=/^[0-9A-Z]+$/i,d=/^[-+]?[0-9]+$/,_=/^(?:[-+]?(?:0|[1-9][0-9]*))$/,x=/^(?:[-+]?(?:[0-9]+))?(?:\.[0-9]*)?(?:[eE][\+\-]?(?:[0-9]+))?$/,h=/^[0-9A-F]+$/i,v=/^[-+]?[0-9]*(\.[0-9]+)?$/,A=/^#?([0-9A-F]{3}|[0-9A-F]{6})$/i,m=/^[\x00-\x7F]+$/,$=/[^\x00-\x7F]/,w=/[^\u0020-\u007E\uFF61-\uFF9F\uFFA0-\uFFDC\uFFE8-\uFFEE0-9a-zA-Z]/,D=/[\u0020-\u007E\uFF61-\uFF9F\uFFA0-\uFFDC\uFFE8-\uFFEE0-9a-zA-Z]/,b=/[\uD800-\uDBFF][\uDC00-\uDFFF]/,y=/^(?:[A-Z0-9+\/]{4})*(?:[A-Z0-9+\/]{2}==|[A-Z0-9+\/]{3}=|[A-Z0-9+\/]{4})$/i,E={"zh-CN":/^(\+?0?86\-?)?1[345789]\d{9}$/,"en-ZA":/^(\+?27|0)\d{9}$/,"en-AU":/^(\+?61|0)4\d{8}$/,"en-HK":/^(\+?852\-?)?[569]\d{3}\-?\d{4}$/,"fr-FR":/^(\+?33|0)[67]\d{8}$/,"pt-PT":/^(\+351)?9[1236]\d{7}$/,"el-GR":/^(\+30)?((2\d{9})|(69\d{8}))$/,"en-GB":/^(\+?44|0)7\d{9}$/,"en-US":/^(\+?1)?[2-9]\d{2}[2-9](?!11)\d{6}$/,"en-ZM":/^(\+26)?09[567]\d{7}$/,"ru-RU":/^(\+?7|8)?9\d{9}$/},I=/^([\+-]?\d{4}(?!\d{2}\b))((-?)((0[1-9]|1[0-2])(\3([12]\d|0[1-9]|3[01]))?|W([0-4]\d|5[0-2])(-?[1-7])?|(00[1-9]|0[1-9]\d|[12]\d{2}|3([0-5]\d|6[1-6])))([T\s]((([01]\d|2[0-3])((:?)[0-5]\d)?|24\:?00)([\.,]\d+(?!:))?)?(\17[0-5]\d([\.,]\d+)?)?([zZ]|([\+-])([01]\d|2[0-3]):?([0-5]\d)?)?)?)?$/;t.extend=function(e,r){t[e]=function(){var e=Array.prototype.slice.call(arguments);return e[0]=t.toString(e[0]),r.apply(t,e)}},t.init=function(){for(var e in t)"function"==typeof t[e]&&"toString"!==e&&"toDate"!==e&&"extend"!==e&&"init"!==e&&t.extend(e,t[e])},t.toString=function(t){return"object"==typeof t&&null!==t&&t.toString?t=t.toString():null===t||"undefined"==typeof t||isNaN(t)&&!t.length?t="":"string"!=typeof t&&(t+=""),t},t.toDate=function(t){return"[object Date]"===Object.prototype.toString.call(t)?t:(t=Date.parse(t),isNaN(t)?null:new Date(t))},t.toFloat=function(t){return parseFloat(t)},t.toInt=function(t,e){return parseInt(t,e||10)},t.toBoolean=function(t,e){return e?"1"===t||"true"===t:"0"!==t&&"false"!==t&&""!==t},t.equals=function(e,r){return e===t.toString(r)},t.contains=function(e,r){return e.indexOf(t.toString(r))>=0},t.matches=function(t,e,r){return"[object RegExp]"!==Object.prototype.toString.call(e)&&(e=new RegExp(e,r)),e.test(t)};var C={allow_display_name:!1,allow_utf8_local_part:!0,require_tld:!0};t.isEmail=function(r,u){if(u=e(u,C),u.allow_display_name){var s=r.match(o);s&&(r=s[1])}var a=r.split("@"),l=a.pop(),f=a.join("@"),c=l.toLowerCase();return("gmail.com"===c||"googlemail.com"===c)&&(f=f.replace(/\./g,"").toLowerCase()),t.isByteLength(f,0,64)&&t.isByteLength(l,0,256)&&t.isFQDN(l,{require_tld:u.require_tld})?u.allow_utf8_local_part?i.test(f):n.test(f):!1};var O={protocols:["http","https","ftp"],require_tld:!0,require_protocol:!1,require_valid_protocol:!0,allow_underscores:!1,allow_trailing_dot:!1,allow_protocol_relative_urls:!1};t.isURL=function(r,n){if(!r||r.length>=2083||/\s/.test(r))return!1;if(0===r.indexOf("mailto:"))return!1;n=e(n,O);var i,o,u,s,a,l,f;if(f=r.split("://"),f.length>1){if(i=f.shift(),n.require_valid_protocol&&-1===n.protocols.indexOf(i))return!1}else{if(n.require_protocol)return!1;n.allow_protocol_relative_urls&&"//"===r.substr(0,2)&&(f[0]=r.substr(2))}return 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o?i.length>=1:i.length===s}return!1};var S={require_tld:!0,allow_underscores:!1,allow_trailing_dot:!1};t.isFQDN=function(t,r){r=e(r,S),r.allow_trailing_dot&&"."===t[t.length-1]&&(t=t.substring(0,t.length-1));var n=t.split(".");if(r.require_tld){var i=n.pop();if(!n.length||!/^([a-z\u00a1-\uffff]{2,}|xn[a-z0-9-]{2,})$/i.test(i))return!1}for(var o,u=0;u<n.length;u++){if(o=n[u],r.allow_underscores){if(o.indexOf("__")>=0)return!1;o=o.replace(/_/g,"")}if(!/^[a-z\u00a1-\uffff0-9-]+$/i.test(o))return!1;if(/[\uff01-\uff5e]/.test(o))return!1;if("-"===o[0]||"-"===o[o.length-1]||o.indexOf("---")>=0)return!1}return!0},t.isBoolean=function(t){return["true","false","1","0"].indexOf(t)>=0},t.isAlpha=function(t){return p.test(t)},t.isAlphanumeric=function(t){return g.test(t)},t.isNumeric=function(t){return d.test(t)},t.isDecimal=function(t){return v.test(t)},t.isHexadecimal=function(t){return h.test(t)},t.isHexColor=function(t){return A.test(t)},t.isLowercase=function(t){return t===t.toLowerCase()},t.isUppercase=function(t){return t===t.toUpperCase()},t.isInt=function(t,e){return e=e||{},_.test(t)&&(!e.hasOwnProperty("min")||t>=e.min)&&(!e.hasOwnProperty("max")||t<=e.max)},t.isFloat=function(t,e){return e=e||{},""!==t&&x.test(t)&&(!e.hasOwnProperty("min")||t>=e.min)&&(!e.hasOwnProperty("max")||t<=e.max)},t.isDivisibleBy=function(e,r){return t.toFloat(e)%t.toInt(r)===0},t.isNull=function(t){return 0===t.length},t.isLength=function(t,e,r){var n=t.match(/[\uD800-\uDBFF][\uDC00-\uDFFF]/g)||[],i=t.length-n.length;return i>=e&&("undefined"==typeof r||r>=i)},t.isByteLength=function(t,e,r){var n=encodeURI(t).split(/%..|./).length-1;return n>=e&&("undefined"==typeof r||r>=n)},t.isUUID=function(t,e){var r=F[e?e:"all"];return r&&r.test(t)},t.isDate=function(t){return!isNaN(Date.parse(t))},t.isAfter=function(e,r){var n=t.toDate(r||new Date),i=t.toDate(e);return!!(i&&n&&i>n)},t.isBefore=function(e,r){var n=t.toDate(r||new Date),i=t.toDate(e);return i&&n&&n>i},t.isIn=function(e,r){var n;if("[object Array]"===Object.prototype.toString.call(r)){var i=[];for(n in r)i[n]=t.toString(r[n]);return i.indexOf(e)>=0}return"object"==typeof r?r.hasOwnProperty(e):r&&"function"==typeof r.indexOf?r.indexOf(e)>=0:!1},t.isCreditCard=function(t){var e=t.replace(/[^0-9]+/g,"");if(!u.test(e))return!1;for(var r,n,i,o=0,s=e.length-1;s>=0;s--)r=e.substring(s,s+1),n=parseInt(r,10),i?(n*=2,o+=n>=10?n%10+1:n):o+=n,i=!i;return!!(o%10===0?e:!1)},t.isISIN=function(t){if(!s.test(t))return!1;for(var e,r,n=t.replace(/[A-Z]/g,function(t){return parseInt(t,36)}),i=0,o=!0,u=n.length-2;u>=0;u--)e=n.substring(u,u+1),r=parseInt(e,10),o?(r*=2,i+=r>=10?r+1:r):i+=r,o=!o;return parseInt(t.substr(t.length-1),10)===(1e4-i)%10},t.isISBN=function(e,r){if(r=t.toString(r),!r)return t.isISBN(e,10)||t.isISBN(e,13);var n,i=e.replace(/[\s-]+/g,""),o=0;if("10"===r){if(!a.test(i))return!1;for(n=0;9>n;n++)o+=(n+1)*i.charAt(n);if(o+="X"===i.charAt(9)?100:10*i.charAt(9),o%11===0)return!!i}else if("13"===r){if(!l.test(i))return!1;var u=[1,3];for(n=0;12>n;n++)o+=u[n%2]*i.charAt(n);if(i.charAt(12)-(10-o%10)%10===0)return!!i}return!1},t.isMobilePhone=function(t,e){return e in E?E[e].test(t):!1};var N={symbol:"$",require_symbol:!1,allow_space_after_symbol:!1,symbol_after_digits:!1,allow_negatives:!0,parens_for_negatives:!1,negative_sign_before_digits:!1,negative_sign_after_digits:!1,allow_negative_sign_placeholder:!1,thousands_separator:",",decimal_separator:".",allow_space_after_digits:!1};t.isCurrency=function(t,n){return n=e(n,N),r(n).test(t)},t.isJSON=function(t){try{var e=JSON.parse(t);return!!e&&"object"==typeof e}catch(r){}return!1},t.isMultibyte=function(t){return $.test(t)},t.isAscii=function(t){return m.test(t)},t.isFullWidth=function(t){return w.test(t)},t.isHalfWidth=function(t){return D.test(t)},t.isVariableWidth=function(t){return w.test(t)&&D.test(t)},t.isSurrogatePair=function(t){return b.test(t)},t.isBase64=function(t){return y.test(t)},t.isMongoId=function(e){return t.isHexadecimal(e)&&24===e.length},t.isISO8601=function(t){return I.test(t)},t.ltrim=function(t,e){var r=e?new RegExp("^["+e+"]+","g"):/^\s+/g;return t.replace(r,"")},t.rtrim=function(t,e){var r=e?new RegExp("["+e+"]+$","g"):/\s+$/g;return t.replace(r,"")},t.trim=function(t,e){var r=e?new RegExp("^["+e+"]+|["+e+"]+$","g"):/^\s+|\s+$/g;return t.replace(r,"")},t.escape=function(t){return t.replace(/&/g,"&amp;").replace(/"/g,"&quot;").replace(/'/g,"&#x27;").replace(/</g,"&lt;").replace(/>/g,"&gt;").replace(/\//g,"&#x2F;").replace(/\`/g,"&#96;")},t.stripLow=function(e,r){var n=r?"\\x00-\\x09\\x0B\\x0C\\x0E-\\x1F\\x7F":"\\x00-\\x1F\\x7F";return t.blacklist(e,n)},t.whitelist=function(t,e){return t.replace(new RegExp("[^"+e+"]+","g"),"")},t.blacklist=function(t,e){return t.replace(new RegExp("["+e+"]+","g"),"")};var B={lowercase:!0};return t.normalizeEmail=function(r,n){if(n=e(n,B),!t.isEmail(r))return!1;var i=r.split("@",2);if(i[1]=i[1].toLowerCase(),"gmail.com"===i[1]||"googlemail.com"===i[1]){if(i[0]=i[0].toLowerCase().replace(/\./g,""),"+"===i[0][0])return!1;i[0]=i[0].split("+")[0],i[1]="gmail.com"}else n.lowercase&&(i[0]=i[0].toLowerCase());return i.join("@")},t.init(),t});
+!function(t,e){"undefined"!=typeof exports&&"undefined"!=typeof module?module.exports=e():"function"==typeof define&&"object"==typeof define.amd?define(e):this[t]=e()}("validator",function(t){"use strict";function e(t,e){t=t||{};for(var r in e)"undefined"==typeof t[r]&&(t[r]=e[r]);return t}function r(t){var e="(\\"+t.symbol.replace(/\./g,"\\.")+")"+(t.require_symbol?"":"?"),r="-?",n="[1-9]\\d*",i="[1-9]\\d{0,2}(\\"+t.thousands_separator+"\\d{3})*",o=["0",n,i],u="("+o.join("|")+")?",s="(\\"+t.decimal_separator+"\\d{2})?",a=u+s;return t.allow_negatives&&!t.parens_for_negatives&&(t.negative_sign_after_digits?a+=r:t.negative_sign_before_digits&&(a=r+a)),t.allow_negative_sign_placeholder?a="( (?!\\-))?"+a:t.allow_space_after_symbol?a=" ?"+a:t.allow_space_after_digits&&(a+="( (?!$))?"),t.symbol_after_digits?a+=e:a=e+a,t.allow_negatives&&(t.parens_for_negatives?a="(\\("+a+"\\)|"+a+")":t.negative_sign_before_digits||t.negative_sign_after_digits||(a=r+a)),new RegExp("^(?!-? )(?=.*\\d)"+a+"$")}t={version:"4.0.1"};var 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