diff --git a/rtd_cina/dist/etc/service.properties b/rtd_cina/dist/etc/service.properties
index 4c228b844b8aa7512f3b95004394fc24f1045e95..804f9b3a548037f1ef65cf361d52e86326f1940c 100644
--- a/rtd_cina/dist/etc/service.properties
+++ b/rtd_cina/dist/etc/service.properties
@@ -223,3 +223,5 @@ main-thread.storage-processor.sundry = ch.systemsx.cisd.cina.dss.CinaSundryStora
 # If this section is empty, then the first input thread will be used.
 # 
 dss-rpc.put-default = main-thread
+
+jython-version=2.7
diff --git a/rtd_cina/etc/service.properties b/rtd_cina/etc/service.properties
index 4e9413b87785a0a05bb8f21d1865c4b13fc52d6f..b48576bf91595789fa46da412249a6ed16f2a76e 100644
--- a/rtd_cina/etc/service.properties
+++ b/rtd_cina/etc/service.properties
@@ -253,3 +253,5 @@ main-thread.storage-processor.sundry = ch.systemsx.cisd.cina.dss.CinaSundryStora
 # 
 dss-rpc.put-default = main-thread
 
+
+jython-version=2.7