diff --git a/composer.json b/composer.json
index 145aa442..8829e722 100644
--- a/composer.json
+++ b/composer.json
@@ -14,7 +14,7 @@
     }
   ],
   "require": {
-    "php": ">=5.3.8",
+    "php": ">=5.5",
     "ext-gd": "*"
   },
   "autoload": {
diff --git a/wire/core/Sanitizer.php b/wire/core/Sanitizer.php
index e54b9a72..316fce4f 100644
--- a/wire/core/Sanitizer.php
+++ b/wire/core/Sanitizer.php
@@ -3927,7 +3927,7 @@ class Sanitizer extends Wire {
 				$str = ltrim($str, '-');
 			}
 			
-			if(stripos($str, 'E-') && preg_match('/^([0-9., ]+\d)(E\-\d+)/i', $str, $m)) {
+			if((stripos($str, 'E-') || stripos($str, 'E+')) && preg_match('/^([0-9., ]+\d)(E[-+]\d+)/i', $str, $m)) {
 				$str = $m[1];
 				$append = $m[2];
 			}
@@ -3984,7 +3984,7 @@ class Sanitizer extends Wire {
 		
 		if($options['getString']) {
 			if($options['precision'] === null) {
-				$value = strpos($value, 'E-') ? rtrim(sprintf('%.20f', (float) $value), '0') : "$value";
+				$value = strpos($value, 'E-') || strpos($value, 'E+') ? rtrim(sprintf('%.20f', (float) $value), '0') : "$value";
 			} else {
 				$value = sprintf('%.' . $options['precision'] . 'f', (float) $value);
 			}
diff --git a/wire/modules/Inputfield/InputfieldFloat.module b/wire/modules/Inputfield/InputfieldFloat.module
index 84cb3fc2..99c9f737 100644
--- a/wire/modules/Inputfield/InputfieldFloat.module
+++ b/wire/modules/Inputfield/InputfieldFloat.module
@@ -117,7 +117,7 @@ class InputfieldFloat extends InputfieldInteger {
 				$attributes['step'] = '.' . ($precision > 1 ? str_repeat('0', $precision - 1) : '') . '1';
 			}
 		}
-		if($attributes && isset($attributes['value']) && strpos($attributes['value'], 'E-')) {
+		if($attributes && isset($attributes['value']) && stripos($attributes['value'], 'E')) {
 			$attributes['value'] = $this->wire()->sanitizer->float($attributes['value'], array(
 				'getString' => true,
 			));