diff --git a/docs/README.md b/docs/README.md
index 221157b..40048bc 100644
--- a/docs/README.md
+++ b/docs/README.md
@@ -5,4 +5,4 @@
 ### Contents
 Name                     | Description
 ----------------------   | ------------------------------
-RISC-V_SweRV_EH1_PRM.pdf | Programmer's Reference Manual V1.5 for SweRV EH1 core
+RISC-V_SweRV_EH1_PRM.pdf | Programmer's Reference Manual V1.5.1 for SweRV EH1 core