diff --git a/constants.properties b/constants.properties
index 0c3a9c0d70..722ce18e47 100644
--- a/constants.properties
+++ b/constants.properties
@@ -23,5 +23,5 @@ snakeYamlVersion=1.19
 caffeineVersion=2.6.2
 metricsVersion=3.2.5
 metricsNewRelicVersion=1.1.1
-openSourceBranch=https://github.com/corda/corda/blob/release/4
+openSourceBranch=https://github.com/corda/corda/blob/release/os/4.1
 openSourceSamplesBranch=https://github.com/corda/samples/blob/release-V4