diff --git a/README.md b/README.md
index 0e0de79..d00dacb 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,4 @@
-# SimpleXLSXGen class 0.9.16 (Official)
+# SimpleXLSXGen class 0.9.17 (Official)
 [<img src="https://img.shields.io/endpoint.svg?url=https%3A%2F%2Fshieldsio-patreon.herokuapp.com%2Fshuchkin" />](https://www.patreon.com/shuchkin) [<img src="https://img.shields.io/github/license/shuchkin/simplexlsxgen" />](https://github.com/shuchkin/simplexlsxgen/blob/master/license.md) [<img src="https://img.shields.io/github/stars/shuchkin/simplexlsxgen" />](https://github.com/shuchkin/simplexlsxgen/stargazers) [<img src="https://img.shields.io/github/forks/shuchkin/simplexlsxgen" />](https://github.com/shuchkin/simplexlsxgen/network) [<img src="https://img.shields.io/github/issues/shuchkin/simplexlsxgen" />](https://github.com/shuchkin/simplexlsxgen/issues)
 
 Export data to Excel XLSX file. PHP XLSX generator. No external tools and libraries.<br/>
@@ -62,7 +62,8 @@ SimpleXLSXGen::fromArray( $data )->saveAs('debug.xlsx');
 
 
 ## History
-v0.9.16 (2020-07-29) Fixed time detection in HH:MM:SS format  
+v0.9.17 (2020-08-21) Fixed real numbers in 123.45 format detection, fast shared strings index (thx fredriksundin)<br/> 
+v0.9.16 (2020-07-29) Fixed time detection in HH:MM:SS format<br/>
 v0.9.15 (2020-07-14) escape of shared strings for special chars in cells [#1](https://github.com/shuchkin/simplexlsxgen/issues/1) <br/>
 v0.9.14 (2020-05-31) fixed num2name A-Z,AA-AZ column names, thx Ertan Yusufoglu<br/>
 v0.9.13 (2020-05-21) if string more 160 chars, save as inlineStr<br/>
diff --git a/src/SimpleXLSXGen.php b/src/SimpleXLSXGen.php
index fc2c42b..337511b 100644
--- a/src/SimpleXLSXGen.php
+++ b/src/SimpleXLSXGen.php
@@ -190,12 +190,12 @@ class SimpleXLSXGen {
 
 						if ( preg_match( '/^[-+]?\d{1,18}$/', $v ) ) {
 							$cv = ltrim($v,'+');
-						} elseif ( preg_match('/^[-+]?\d+\.?\d*$/', $v ) ) {
+						} elseif ( preg_match('/^[-+]?\d+\.\d+$/', $v ) ) {
 							$cv = ltrim($v,'+');
 						} elseif ( preg_match('/^([-+]?\d+)%$/', $v, $m) ) {
 							$cv = round( $m[1] / 100, 2);
 							$cs = 1; // [9] 0%
-						} elseif ( preg_match('/^([-+]\d+\.\d*)%$/', $v, $m) ) {
+						} elseif ( preg_match('/^([-+]\d+\.\d+)%$/', $v, $m) ) {
 							$cv = round( $m[1] / 100, 4 );
 							$cs = 2; // [10] 0.00%
 						} elseif ( preg_match('/^(\d\d\d\d)-(\d\d)-(\d\d)$/', $v, $m ) ){
@@ -214,7 +214,7 @@ class SimpleXLSXGen {
 							$ct = 's'; // shared string
 							$v = str_replace(['&','<','>'],['&amp;','&lt;','&gt;'], $v);
 							$cv = false;
-							if ( isset($SI_KEYS[$v]) && $SI[$SI_KEYS[$v]] === $v ) {
+							if ( isset($SI_KEYS[$v]) ) {
 								$cv = $SI_KEYS[$v];
 							}