diff --git a/include/mcl/op.hpp b/include/mcl/op.hpp
index c3c22fa..816c553 100644
--- a/include/mcl/op.hpp
+++ b/include/mcl/op.hpp
@@ -26,7 +26,7 @@
 
 namespace mcl {
 
-static const int version = 0x129; /* 0xABC = A.BC */
+static const int version = 0x130; /* 0xABC = A.BC */
 
 /*
 	specifies available string format mode for X::setIoMode()
diff --git a/readme.md b/readme.md
index 7e645e7..e71c0b8 100644
--- a/readme.md
+++ b/readme.md
@@ -320,6 +320,7 @@ If `MCL_USE_OLD_MAPTO_FOR_BLS12` is defined, then the old function is used, but
 
 # History
 
+- 2021/Jan/28 v1.30 a little optimization of Fp operations
 - 2020/Nov/14 v1.28 support M1 mac
 - 2020/Jun/07 v1.22 remove old hash-to-curve functions
 - 2020/Jun/04 v1.21 mapToG1 and hashAndMapToG1 are compatible to irtf/eip-2537