diff --git a/configure.ac b/configure.ac
index b5eb9399d4e68..14351a8bddb1d 100644
--- a/configure.ac
+++ b/configure.ac
@@ -12,7 +12,7 @@ AC_PREREQ(2.59)
 # In the SVN trunk, the version should always be the next anticipated release
 # version with the "-pre" suffix.  (We used to use "-SNAPSHOT" but this pushed
 # the size of one file name in the dist tarfile over the 99-char limit.)
-AC_INIT([Protocol Buffers],[3.0.0-alpha-2],[protobuf@googlegroups.com],[protobuf])
+AC_INIT([Protocol Buffers],[3.0.0-alpha-3-pre],[protobuf@googlegroups.com],[protobuf])
 
 AM_MAINTAINER_MODE([enable])
 
diff --git a/java/pom.xml b/java/pom.xml
index 75d4c7f6e3aaa..2d1c05a0aa428 100644
--- a/java/pom.xml
+++ b/java/pom.xml
@@ -10,7 +10,7 @@
   </parent>
   <groupId>com.google.protobuf</groupId>
   <artifactId>protobuf-java</artifactId>
-  <version>3.0.0-alpha-2</version>
+  <version>3.0.0-alpha-3-pre</version>
   <packaging>bundle</packaging>
   <name>Protocol Buffer Java API</name>
   <description>
@@ -152,7 +152,7 @@
           <instructions>
             <Bundle-DocURL>https://developers.google.com/protocol-buffers/</Bundle-DocURL>
             <Bundle-SymbolicName>com.google.protobuf</Bundle-SymbolicName>
-            <Export-Package>com.google.protobuf;version=3.0.0-alpha-2</Export-Package>
+            <Export-Package>com.google.protobuf;version=3.0.0-alpha-3-pre</Export-Package>
           </instructions>
         </configuration>
       </plugin>
diff --git a/javanano/pom.xml b/javanano/pom.xml
index 50056cd3beefd..53dd666515708 100644
--- a/javanano/pom.xml
+++ b/javanano/pom.xml
@@ -10,7 +10,7 @@
   </parent>
   <groupId>com.google.protobuf.nano</groupId>
   <artifactId>protobuf-javanano</artifactId>
-  <version>3.0.0-alpha-2</version>
+  <version>3.0.0-alpha-3-pre</version>
   <packaging>bundle</packaging>
   <name>Protocol Buffer JavaNano API</name>
   <description>
@@ -156,7 +156,7 @@
           <instructions>
             <Bundle-DocURL>https://developers.google.com/protocol-buffers/</Bundle-DocURL>
             <Bundle-SymbolicName>com.google.protobuf</Bundle-SymbolicName>
-            <Export-Package>com.google.protobuf;version=3.0.0-alpha-2</Export-Package>
+            <Export-Package>com.google.protobuf;version=3.0.0-alpha-3-pre</Export-Package>
           </instructions>
         </configuration>
       </plugin>
diff --git a/python/setup.py b/python/setup.py
index c6ff7454b9257..b97fdaea158d2 100755
--- a/python/setup.py
+++ b/python/setup.py
@@ -150,7 +150,7 @@ def run(self):
     os.environ['PROTOCOL_BUFFERS_PYTHON_IMPLEMENTATION'] = 'cpp'
 
   setup(name = 'protobuf',
-        version = '3.0.0-alpha-2',
+        version = '3.0.0-alpha-3-pre',
         packages = [ 'google' ],
         namespace_packages = [ 'google' ],
         google_test_dir = "google/protobuf/internal",
diff --git a/ruby/google-protobuf.gemspec b/ruby/google-protobuf.gemspec
index e294751f55699..01d27636566c2 100644
--- a/ruby/google-protobuf.gemspec
+++ b/ruby/google-protobuf.gemspec
@@ -7,7 +7,7 @@ end
 
 Gem::Specification.new do |s|
   s.name        = "google-protobuf"
-  s.version     = "3.0.0.alpha.2.0"
+  s.version     = "3.0.0.alpha.3.pre"
   s.licenses    = ["BSD"]
   s.summary     = "Protocol Buffers"
   s.description = "Protocol Buffers are Google's data interchange format."