diff --git a/include/mcl/op.hpp b/include/mcl/op.hpp
index ded5d1b..aa90110 100644
--- a/include/mcl/op.hpp
+++ b/include/mcl/op.hpp
@@ -23,7 +23,7 @@
 
 namespace mcl {
 
-static const int version = 0x092; /* 0xABC = A.BC */
+static const int version = 0x093; /* 0xABC = A.BC */
 
 /*
 	specifies available string format mode for X::setIoMode()
diff --git a/readme.md b/readme.md
index 8bd56f0..24a5cbc 100644
--- a/readme.md
+++ b/readme.md
@@ -443,6 +443,7 @@ Y. Sakemi, Y. Nogami, K. Okeya, Y. Morikawa, CANS 2008.
 
 # History
 
+* 2019/Apr/24 v0.93 support ios
 * 2019/Mar/22 v0.92 shortcut for Ec::mul(Px, P, x) if P = 0
 * 2019/Mar/21 python binding of she256 for Linux/Mac/Windows
 * 2019/Mar/14 v0.91 modp supports mcl-wasm