diff --git a/st.cmd b/st.cmd
index a81c023a011e2f9a49b508d26fe79df57c33bf66..b11e59b548f1ea85b95039f0853649bf6488db54 100644
--- a/st.cmd
+++ b/st.cmd
@@ -11,7 +11,8 @@ epicsEnvSet("TSELPV" "TS2-010:Ctrl-EVR-101:EvtACnt-I.TIME")
 iocshLoad("$(essioc_DIR)/common_config.iocsh")
 
 # Load LLRF
-require llrfsystem
+require sis8300llrf, 5.6.2
+require llrfsystem, 3.7.7
 
 epicsEnvSet("RFENDPV", "$(LLRF_DIGRTM_PREFIX):$(LLRF_DIG_R_1):PosRFEnd")
 iocshLoad("$(llrfsystem_DIR)/ts2-sec.iocsh", "P=$(LLRF_PREFIX):, R=, PD=$(LLRF_DIGRTM_PREFIX):, RD=$(LLRF_DIG_R_1):, PD1=$(LLRF_DIGRTM_PREFIX):, RD1=$(LLRF_DIG_R_1):, RR=$(LLRF_RFM_R_1):")