diff --git a/build/node.js b/build/node.js
index c59fe3a..fcd0bcb 100644
--- a/build/node.js
+++ b/build/node.js
@@ -14,10 +14,10 @@ GradientParser.parse = (function() {
     sideOrCorner: /^to (left (top|bottom)|right (top|bottom)|left|right|top|bottom)/i,
     extentKeywords: /^(closest\-side|closest\-corner|farthest\-side|farthest\-corner|contain|cover)/,
     positionKeywords: /^(left|center|right|top|bottom)/i,
-    pixelValue: /^([0-9]+)px/,
-    percentageValue: /^([0-9]+)\%/,
-    emValue: /^([0-9]+)em/,
-    angleValue: /^([0-9]+)deg/,
+    pixelValue: /^(-?(([0-9]*\.[0-9]+)|([0-9]+\.?)))px/,
+    percentageValue: /^(-?(([0-9]*\.[0-9]+)|([0-9]+\.?)))\%/,
+    emValue: /^(-?(([0-9]*\.[0-9]+)|([0-9]+\.?)))em/,
+    angleValue: /^(-?(([0-9]*\.[0-9]+)|([0-9]+\.?)))deg/,
     startCall: /^\(/,
     endCall: /^\)/,
     comma: /^,/,
diff --git a/build/web.js b/build/web.js
index bba8a79..de8fd61 100644
--- a/build/web.js
+++ b/build/web.js
@@ -14,10 +14,10 @@ GradientParser.parse = (function() {
     sideOrCorner: /^to (left (top|bottom)|right (top|bottom)|left|right|top|bottom)/i,
     extentKeywords: /^(closest\-side|closest\-corner|farthest\-side|farthest\-corner|contain|cover)/,
     positionKeywords: /^(left|center|right|top|bottom)/i,
-    pixelValue: /^([0-9]+)px/,
-    percentageValue: /^([0-9]+)\%/,
-    emValue: /^([0-9]+)em/,
-    angleValue: /^([0-9]+)deg/,
+    pixelValue: /^(-?(([0-9]*\.[0-9]+)|([0-9]+\.?)))px/,
+    percentageValue: /^(-?(([0-9]*\.[0-9]+)|([0-9]+\.?)))\%/,
+    emValue: /^(-?(([0-9]*\.[0-9]+)|([0-9]+\.?)))em/,
+    angleValue: /^(-?(([0-9]*\.[0-9]+)|([0-9]+\.?)))deg/,
     startCall: /^\(/,
     endCall: /^\)/,
     comma: /^,/,
diff --git a/lib/parser.js b/lib/parser.js
index bba8a79..de8fd61 100644
--- a/lib/parser.js
+++ b/lib/parser.js
@@ -14,10 +14,10 @@ GradientParser.parse = (function() {
     sideOrCorner: /^to (left (top|bottom)|right (top|bottom)|left|right|top|bottom)/i,
     extentKeywords: /^(closest\-side|closest\-corner|farthest\-side|farthest\-corner|contain|cover)/,
     positionKeywords: /^(left|center|right|top|bottom)/i,
-    pixelValue: /^([0-9]+)px/,
-    percentageValue: /^([0-9]+)\%/,
-    emValue: /^([0-9]+)em/,
-    angleValue: /^([0-9]+)deg/,
+    pixelValue: /^(-?(([0-9]*\.[0-9]+)|([0-9]+\.?)))px/,
+    percentageValue: /^(-?(([0-9]*\.[0-9]+)|([0-9]+\.?)))\%/,
+    emValue: /^(-?(([0-9]*\.[0-9]+)|([0-9]+\.?)))em/,
+    angleValue: /^(-?(([0-9]*\.[0-9]+)|([0-9]+\.?)))deg/,
     startCall: /^\(/,
     endCall: /^\)/,
     comma: /^,/,
diff --git a/spec/parser.spec.js b/spec/parser.spec.js
index 6856adf..e1281c6 100644
--- a/spec/parser.spec.js
+++ b/spec/parser.spec.js
@@ -197,7 +197,7 @@ describe('gradient-parser.js', function () {
       'ellipse cover',
       'circle cover',
       'center bottom, ellipse cover',
-      'circle at 119px 58px'
+      'circle at 87.23px -58.3px'
     ].forEach(function(declaration) {
 
       it('should parse ' + declaration + ' declaration', function() {