diff --git a/regression-testing/MosesRegressionTesting.pm b/regression-testing/MosesRegressionTesting.pm
index 376d9aa28..2bbd9b171 100644
--- a/regression-testing/MosesRegressionTesting.pm
+++ b/regression-testing/MosesRegressionTesting.pm
@@ -5,7 +5,7 @@ use strict;
 # if your tests need a new version of the test data, increment this
 # and make sure that a moses-regression-tests-vX.Y is available for
 # download from statmt.org (redpony AT umd dot edu for more info)
-use constant TESTING_DATA_VERSION => '4';
+use constant TESTING_DATA_VERSION => '5';
 
 # find the data directory in a few likely locations and make sure
 # that it is the correct version