diff --git a/tools/atc/README b/tools/atc/README
index 658155c8fb..4a606990f8 100644
--- a/tools/atc/README
+++ b/tools/atc/README
@@ -1,9 +1,9 @@
 These are the scripts used to create the ATC lists for use in PTL
 elections and Summit invitations.
 
-0) Write a patch to email-stats.py so steps 1-2 are not necessary.
-1) Edit email-stats.py to set your gerrit username.
-2) Edit email-stats.py to set the start_date and end_date.
+0) Write a patch to email_stats.py so steps 1-2 are not necessary.
+1) Edit email_stats.py to set your gerrit username.
+2) Edit email_stats.py to set the start_date and end_date.
 3) Run the following queries on review.openstack.org:
 
   SELECT * FROM accounts
diff --git a/tools/atc/email-stats.sh b/tools/atc/email-stats.sh
index 293129217d..522948704d 100755
--- a/tools/atc/email-stats.sh
+++ b/tools/atc/email-stats.sh
@@ -7,7 +7,7 @@ for project in $(
     | grep '^ *- [A-Za-z_-]\+/[A-Za-z_-]\+$' \
     | sed 's/^ *- //'
 ) ; do
-    python email-stats.py -p $project -o out/$( basename $project ).csv
+    python email_stats.py -p $project -o out/$( basename $project ).csv
 done
 
 # Confirmed list of non-code contributors
diff --git a/tools/atc/email-stats.py b/tools/atc/email_stats.py
similarity index 100%
rename from tools/atc/email-stats.py
rename to tools/atc/email_stats.py