diff --git a/ModelFiles/mat/yeastGEM.mat b/ModelFiles/mat/yeastGEM.mat
index 65c51a40..047bfc22 100644
Binary files a/ModelFiles/mat/yeastGEM.mat and b/ModelFiles/mat/yeastGEM.mat differ
diff --git a/ModelFiles/xlsx/yeastGEM.xlsx b/ModelFiles/xlsx/yeastGEM.xlsx
index da479d12..204ceedd 100644
Binary files a/ModelFiles/xlsx/yeastGEM.xlsx and b/ModelFiles/xlsx/yeastGEM.xlsx differ
diff --git a/ModelFiles/xml/yeastGEM.xml b/ModelFiles/xml/yeastGEM.xml
index 185b4e93..0f81ec2c 100644
--- a/ModelFiles/xml/yeastGEM.xml
+++ b/ModelFiles/xml/yeastGEM.xml
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <sbml xmlns="http://www.sbml.org/sbml/level3/version1/core" xmlns:fbc="http://www.sbml.org/sbml/level3/version1/fbc/version2" xmlns:groups="http://www.sbml.org/sbml/level3/version1/groups/version1" level="3" version="1" fbc:required="false" groups:required="false">
-  <model metaid="yeastGEM.xml" id="M_yeastGEM_v8__46__3__46__0" name="The Consensus Genome-Scale Metabolic Model of Yeast" fbc:strict="true">
+  <model metaid="yeastGEM.xml" id="M_yeastGEM_v8__46__3__46__1" name="The Consensus Genome-Scale Metabolic Model of Yeast" fbc:strict="true">
     <listOfUnitDefinitions>
       <unitDefinition id="mmol_per_gDW_per_hr">
         <listOfUnits>
diff --git a/history.md b/history.md
index 6d8874e7..fb0bda0b 100644
--- a/history.md
+++ b/history.md
@@ -1,5 +1,14 @@
 # History
 
+### yeast 8.3.1:
+* Features:
+  * Added 21 reactions & 14 metabolites based on metabolomics data (PR #156).
+  * Added metadata to the excel version of the model (PR #163).
+  * Added `ComplementaryData/physiology` with biological data of yeast (PR #159).
+* Fixes/Others:
+  * Fixed bug that underestimated the biomass content (PR #159).
+  * Fitted GAM to chemostat data (PR #159).
+
 ### yeast 8.3.0:
 * Features:
   * Added 225 new reactions and 148 new metabolites, based on growth data from a Biolog substrate usage experiment on carbon, nitrogen, sulfur and phosphorus substrates (PR #149).
diff --git a/version.txt b/version.txt
index 9f4a0fbc..905c2439 100644
--- a/version.txt
+++ b/version.txt
@@ -1 +1 @@
-8.3.0
\ No newline at end of file
+8.3.1
\ No newline at end of file