diff --git a/GlowScriptOffline/GlowScript.html b/GlowScriptOffline/GlowScript.html
index 2c8fae51..5c03cf3d 100644
--- a/GlowScriptOffline/GlowScript.html
+++ b/GlowScriptOffline/GlowScript.html
@@ -42,8 +42,8 @@
 <script type="text/javascript" src="glowscript_libraries/jquery.min.js"></script>
 <script type="text/javascript" src="glowscript_libraries/jquery-ui.custom.min.js"></script>
 <script type="text/javascript" src="glowscript_libraries/editor.js"></script>
-<script type="text/javascript" src="glowscript_libraries/RSrun.3.0.min.js"></script>
-<script type="text/javascript" src="glowscript_libraries/glow.3.0.min.js" charset="UTF-8"></script>
+<script type="text/javascript" src="glowscript_libraries/RSrun.3.1.min.js"></script>
+<script type="text/javascript" src="glowscript_libraries/glow.3.1.min.js" charset="UTF-8"></script>
 <script type="text/javascript" src="glowscript_libraries/split.min.js"></script>
 <script type="text/javascript" src="glowscript_libraries/Roboto_Medium_ttf_sans.js"></script>
 <script type="text/javascript" src="glowscript_libraries/NimbusRomNo9L_Med_otf_serif.js"></script>
@@ -60,14 +60,14 @@
 <input type="file" id="read_local_file"/>
 
 <script>
-var gsversion = '3.0'
+var gsversion = '3.1'
 var printpane = false
 var exporting = false // not currently in export mode
 var lastprintwidth = null
 
-var glowscript_run = undefined
 window.Jupyter_VPython = undefined
 if (!navigator.onLine) window.Jupyter_VPython = 'glowscript_data/' // get textures when offline
+
 // TAB at end of line should lengthen the line; implement Ctrl-1 and Ctrl-2
 
 // localCompile is a modification of https://github.com/vpython/glowscript/blob/master/ide/ide.js
diff --git a/GlowScriptOffline3.1.zip b/GlowScriptOffline3.1.zip
index 80de02ca..21d820b4 100644
Binary files a/GlowScriptOffline3.1.zip and b/GlowScriptOffline3.1.zip differ