diff --git a/TestGrid.md b/TestGrid.md
index abcc10b..5aa92ea 100644
--- a/TestGrid.md
+++ b/TestGrid.md
@@ -18,13 +18,13 @@ After installing the code according to the [README]source:README, set up a clien
 
 Usage statistics are available for the public test grid.
  * count of directories in the grid
-![](http://allmydata.org/tahoe-munin/tahoecs1.allmydata.com-tahoe_dirnodes-week.png) [/tahoe-munin/tahoecs1.allmydata.com-tahoe_dirnodes.html other time scales]
+![](http://allmydata.org/tahoe-munin/tahoecs1.allmydata.com-tahoe_dirnodes-month.png) [/tahoe-munin/tahoecs1.allmydata.com-tahoe_dirnodes.html other time scales]
 
  * count of files stored in the grid
-![](http://allmydata.org/tahoe-munin/tahoebs1.allmydata.com-tahoe_files-week.png) [/tahoe-munin/tahoebs1.allmydata.com-tahoe_files.html other time scales]
+![](http://allmydata.org/tahoe-munin/tahoebs1.allmydata.com-tahoe_files-month.png) [/tahoe-munin/tahoebs1.allmydata.com-tahoe_files.html other time scales]
 
  * average shares per file -- this hints at the number of nodes in the overall grid; If the number of hosts in the grid is less than 100, then shares_per_file should equal about 100/numhost
-![](http://allmydata.org/tahoe-munin/tahoebs1.allmydata.com-tahoe_sharesperfile-week.png)  [/tahoe-munin/tahoebs1.allmydata.com-tahoe_sharesperfile.html other time scales]
+![](http://allmydata.org/tahoe-munin/tahoebs1.allmydata.com-tahoe_sharesperfile-month.png)  [/tahoe-munin/tahoebs1.allmydata.com-tahoe_sharesperfile.html other time scales]
 
  * total bytes consumed by all of the Tahoe test grid storage servers operated by Allmydata Inc.
-![](http://allmydata.org/tahoe-munin/tahoebs1.allmydata.com-tahoe_storagespace-week.png) [/tahoe-munin/tahoebs1.allmydata.com-tahoe_storagespace.html other time scales]
+![](http://allmydata.org/tahoe-munin/tahoebs1.allmydata.com-tahoe_storagespace-month.png) [/tahoe-munin/tahoebs1.allmydata.com-tahoe_storagespace.html other time scales]