Upgrade to protobuf-3.0.0-beta-1
diff --git a/COMPILING.md b/COMPILING.md
index fff734f..7ac36dd 100644
--- a/COMPILING.md
+++ b/COMPILING.md
@@ -27,13 +27,13 @@
 generation. Most users only need to use `skipCodegen=true` as discussed above.
 
 ### Build Protobuf
-The codegen plugin is C++ code and requires protobuf 3.0.0-alpha-3.1.
+The codegen plugin is C++ code and requires protobuf 3.0.0-beta-1.
 
 For Linux, Mac and MinGW:
 ```
 $ git clone https://github.com/google/protobuf.git
 $ cd protobuf
-$ git checkout v3.0.0-alpha-3.1
+$ git checkout v3.0.0-beta-1
 $ ./autogen.sh
 $ ./configure
 $ make
@@ -72,15 +72,15 @@
 Gradle to find protobuf:
 ```
 .\gradlew install ^
-    -PvcProtobufInclude=C:\path\to\protobuf-3.0.0-alpha-3.1\src ^
-    -PvcProtobufLibs=C:\path\to\protobuf-3.0.0-alpha-3.1\vsprojects\Release
+    -PvcProtobufInclude=C:\path\to\protobuf-3.0.0-beta-1\src ^
+    -PvcProtobufLibs=C:\path\to\protobuf-3.0.0-beta-1\vsprojects\Release
 ```
 
 Since specifying those properties every build is bothersome, you can instead
 create ``<project-root>\gradle.properties`` with contents like:
 ```
-vcProtobufInclude=C:\\path\\to\\protobuf-3.0.0-alpha-3.1\\src
-vcProtobufLibs=C:\\path\\to\\protobuf-3.0.0-alpha-3.1\\vsprojects\\Release
+vcProtobufInclude=C:\\path\\to\\protobuf-3.0.0-beta-1\\src
+vcProtobufLibs=C:\\path\\to\\protobuf-3.0.0-beta-1\\vsprojects\\Release
 ```
 
 The build script will build the codegen for the same architecture as the Java