diff --git a/README.md b/README.md
index 231f1a6..66e672f 100644
--- a/README.md
+++ b/README.md
@@ -14,8 +14,8 @@ TO MAKE
 -------
     make -e os=XXX arch=YYY
 
-XXX: [LINUX(default), BSD, OSX]
-YYY: [IA32(default), POWERPC, IA64, AMD64]
+XXX: [LINUX(default), BSD, OSX]   
+YYY: [AMD64(default), POWERPC, IA64, IA32]  
 
 ### Dependencies:
 OpenSSL (libssl and libcrypto)
diff --git a/src/Makefile b/src/Makefile
index fbdb074..e0f80ba 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -5,7 +5,7 @@ ifndef os
 endif
 
 ifndef arch
-   arch = IA32
+   arch = AMD64
 endif
 
 CCFLAGS = -Wall -D$(os) -I../udt/src -finline-functions -g
diff --git a/src/version b/src/version
index 4f3e607..91767f9 100644
--- a/src/version
+++ b/src/version
@@ -1 +1 @@
-v0.9.3-16-g0d656ac
+v0.9.4-11-g7885528
diff --git a/udt/app/Makefile b/udt/app/Makefile
index 9bdc02a..a142891 100644
--- a/udt/app/Makefile
+++ b/udt/app/Makefile
@@ -5,7 +5,7 @@ ifndef os
 endif
 
 ifndef arch
-   arch = IA32
+   arch = AMD64
 endif
 
 CCFLAGS = -Wall -D$(os) -I../src -finline-functions -O3
diff --git a/udt/src/Makefile b/udt/src/Makefile
index e75a2eb..f3d14a8 100644
--- a/udt/src/Makefile
+++ b/udt/src/Makefile
@@ -5,7 +5,7 @@ ifndef os
 endif
 
 ifndef arch
-   arch = IA32
+   arch = AMD64
 endif
 
 CCFLAGS = -fPIC -Wall -Wextra -D$(os) -finline-functions -O3 -fno-strict-aliasing #-msse3
diff --git a/udt/tuner/Makefile b/udt/tuner/Makefile
index 9f653d5..dfd10f6 100644
--- a/udt/tuner/Makefile
+++ b/udt/tuner/Makefile
@@ -5,7 +5,7 @@ ifndef os
 endif
 
 ifndef arch
-   arch = IA32
+   arch = AMD64
 endif
 
 CCFLAGS = -Wall -D$(os) -I../src -finline-functions -O3