diff --git a/stats/known_apks.txt b/stats/known_apks.txt
index 512c7c614a..96fffe29bf 100644
--- a/stats/known_apks.txt
+++ b/stats/known_apks.txt
@@ -2251,6 +2251,7 @@ fennec-27.0.multi.android-arm.apk org.mozilla.firefox 2014-02-04
 fennec-28.0.multi.android-arm.apk org.mozilla.firefox 2014-03-21
 fennec-29.0.multi.android-arm.apk org.mozilla.firefox 2014-05-02
 fennec-30.0.multi.android-arm.apk org.mozilla.firefox 2014-06-25
+fennec-31.0.multi.android-arm.apk org.mozilla.firefox 2014-07-23
 fennec-5.0.multi.eabi-arm.apk org.mozilla.firefox
 fennec-6.0.multi.eabi-arm.apk org.mozilla.firefox
 fennec-9.0.multi.android-arm.apk org.mozilla.firefox 2012-01-19