diff --git a/Protobuf.podspec b/Protobuf.podspec
index 84a37996ba930..24498a27ed7bc 100644
--- a/Protobuf.podspec
+++ b/Protobuf.podspec
@@ -5,7 +5,7 @@
 # dependent projects use the :git notation to refer to the library.
 Pod::Spec.new do |s|
   s.name     = 'Protobuf'
-  s.version  = '3.5.1'
+  s.version  = '3.5.2'
   s.summary  = 'Protocol Buffers v.3 runtime library for Objective-C.'
   s.homepage = 'https://github.com/google/protobuf'
   s.license  = '3-Clause BSD License'
diff --git a/configure.ac b/configure.ac
index 6283e317d205d..6e9ce1f5afa04 100644
--- a/configure.ac
+++ b/configure.ac
@@ -17,7 +17,7 @@ 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],[3.5.1],[protobuf@googlegroups.com],[protobuf])
+AC_INIT([Protocol Buffers],[3.5.2],[protobuf@googlegroups.com],[protobuf])
 
 AM_MAINTAINER_MODE([enable])
 
diff --git a/csharp/Google.Protobuf.Tools.nuspec b/csharp/Google.Protobuf.Tools.nuspec
index 62eb3b589b95d..4294949f661b0 100644
--- a/csharp/Google.Protobuf.Tools.nuspec
+++ b/csharp/Google.Protobuf.Tools.nuspec
@@ -5,7 +5,7 @@
     <title>Google Protocol Buffers tools</title>
     <summary>Tools for Protocol Buffers - Google's data interchange format.</summary>
     <description>See project site for more info.</description>
-    <version>3.5.1</version>
+    <version>3.5.2</version>
     <authors>Google Inc.</authors>
     <owners>protobuf-packages</owners>
     <licenseUrl>https://github.com/google/protobuf/blob/master/LICENSE</licenseUrl>
diff --git a/csharp/src/Google.Protobuf/Google.Protobuf.csproj b/csharp/src/Google.Protobuf/Google.Protobuf.csproj
index 4df0bda62ea00..6e4e1e2bceda3 100644
--- a/csharp/src/Google.Protobuf/Google.Protobuf.csproj
+++ b/csharp/src/Google.Protobuf/Google.Protobuf.csproj
@@ -4,7 +4,7 @@
     <Description>C# runtime library for Protocol Buffers - Google's data interchange format.</Description>
     <Copyright>Copyright 2015, Google Inc.</Copyright>
     <AssemblyTitle>Google Protocol Buffers</AssemblyTitle>
-    <VersionPrefix>3.5.1</VersionPrefix>
+    <VersionPrefix>3.5.2</VersionPrefix>
     <Authors>Google Inc.</Authors>
     <TargetFrameworks>netstandard1.0;net45</TargetFrameworks>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
diff --git a/java/core/pom.xml b/java/core/pom.xml
index 4b65e72e600d4..8139241b3ba9f 100644
--- a/java/core/pom.xml
+++ b/java/core/pom.xml
@@ -6,7 +6,7 @@
   <parent>
     <groupId>com.google.protobuf</groupId>
     <artifactId>protobuf-parent</artifactId>
-    <version>3.5.1</version>
+    <version>3.5.2</version>
   </parent>
 
   <artifactId>protobuf-java</artifactId>
diff --git a/java/pom.xml b/java/pom.xml
index b7c3e4857b39c..c42cae11d8383 100644
--- a/java/pom.xml
+++ b/java/pom.xml
@@ -11,7 +11,7 @@
 
   <groupId>com.google.protobuf</groupId>
   <artifactId>protobuf-parent</artifactId>
-  <version>3.5.1</version>
+  <version>3.5.2</version>
   <packaging>pom</packaging>
 
   <name>Protocol Buffers [Parent]</name>
diff --git a/java/util/pom.xml b/java/util/pom.xml
index 3de624fa8e547..4e55df0d29cb0 100644
--- a/java/util/pom.xml
+++ b/java/util/pom.xml
@@ -6,7 +6,7 @@
   <parent>
     <groupId>com.google.protobuf</groupId>
     <artifactId>protobuf-parent</artifactId>
-    <version>3.5.1</version>
+    <version>3.5.2</version>
   </parent>
 
   <artifactId>protobuf-java-util</artifactId>
diff --git a/js/package.json b/js/package.json
index 3c1c2a42c1d6f..39d99f9370841 100644
--- a/js/package.json
+++ b/js/package.json
@@ -1,6 +1,6 @@
 {
   "name": "google-protobuf",
-  "version": "3.5.1",
+  "version": "3.5.2",
   "description": "Protocol Buffers for JavaScript",
   "main": "google-protobuf.js",
   "files": [
diff --git a/php/ext/google/protobuf/package.xml b/php/ext/google/protobuf/package.xml
index 626eb46b1b740..3a556acf376d3 100644
--- a/php/ext/google/protobuf/package.xml
+++ b/php/ext/google/protobuf/package.xml
@@ -10,11 +10,11 @@
   <email>protobuf-opensource@google.com</email>
   <active>yes</active>
  </lead>
- <date>2017-12-11</date>
+ <date>2018-03-06</date>
  <time>11:02:07</time>
  <version>
-  <release>3.5.1</release>
-  <api>3.5.1</api>
+  <release>3.5.2</release>
+  <api>3.5.2</api>
  </version>
  <stability>
   <release>stable</release>
@@ -216,5 +216,21 @@ GA release.
 GA release.
    </notes>
   </release>
+  <release>
+   <version>
+    <release>3.5.2</release>
+    <api>3.5.2</api>
+   </version>
+   <stability>
+    <release>stable</release>
+    <api>stable</api>
+   </stability>
+   <date>2018-03-06</date>
+   <time>11:02:07</time>
+   <license uri="https://opensource.org/licenses/BSD-3-Clause">3-Clause BSD License</license>
+   <notes>
+G  A release.
+   </notes>
+  </release>
  </changelog>
 </package>
diff --git a/php/ext/google/protobuf/protobuf.h b/php/ext/google/protobuf/protobuf.h
index be1de5cf15266..c15bde2d19659 100644
--- a/php/ext/google/protobuf/protobuf.h
+++ b/php/ext/google/protobuf/protobuf.h
@@ -37,7 +37,7 @@
 #include "upb.h"
 
 #define PHP_PROTOBUF_EXTNAME "protobuf"
-#define PHP_PROTOBUF_VERSION "3.5.1"
+#define PHP_PROTOBUF_VERSION "3.5.2"
 
 #define MAX_LENGTH_OF_INT64 20
 #define SIZEOF_INT64 8
diff --git a/protoc-artifacts/pom.xml b/protoc-artifacts/pom.xml
index f71d63b5c1ec9..298730a6e9e73 100644
--- a/protoc-artifacts/pom.xml
+++ b/protoc-artifacts/pom.xml
@@ -10,7 +10,7 @@
   </parent>
   <groupId>com.google.protobuf</groupId>
   <artifactId>protoc</artifactId>
-  <version>3.5.1-1</version>
+  <version>3.5.2</version>
   <packaging>pom</packaging>
   <name>Protobuf Compiler</name>
   <description>
diff --git a/python/google/protobuf/__init__.py b/python/google/protobuf/__init__.py
index 950f9b2d6cf27..d43607271c447 100755
--- a/python/google/protobuf/__init__.py
+++ b/python/google/protobuf/__init__.py
@@ -30,7 +30,7 @@
 
 # Copyright 2007 Google Inc. All Rights Reserved.
 
-__version__ = '3.5.1'
+__version__ = '3.5.2'
 
 if __name__ != '__main__':
   try:
diff --git a/python/setup.py b/python/setup.py
index 6f5315f7ac4b8..afe021fe95f1a 100755
--- a/python/setup.py
+++ b/python/setup.py
@@ -179,9 +179,6 @@ def get_option_from_sys_argv(option_str):
     # extension. Note that those libraries have to be compiled with
     # -fPIC for this to work.
     compile_static_ext = get_option_from_sys_argv('--compile_static_extension')
-    extra_compile_args = ['-Wno-write-strings',
-                          '-Wno-invalid-offsetof',
-                          '-Wno-sign-compare']
     libraries = ['protobuf']
     extra_objects = None
     if compile_static_ext:
@@ -190,6 +187,27 @@ def get_option_from_sys_argv(option_str):
                        '../src/.libs/libprotobuf-lite.a']
     test_conformance.target = 'test_python_cpp'
 
+    extra_compile_args = []
+
+    if sys.platform != 'win32':
+        extra_compile_args.append('-Wno-write-strings')
+        extra_compile_args.append('-Wno-invalid-offsetof')
+        extra_compile_args.append('-Wno-sign-compare')
+
+    # https://github.com/Theano/Theano/issues/4926
+    if sys.platform == 'win32':
+      extra_compile_args.append('-D_hypot=hypot')
+
+    # https://github.com/tpaviot/pythonocc-core/issues/48
+    if sys.platform == 'win32' and  '64 bit' in sys.version:
+      extra_compile_args.append('-DMS_WIN64')
+
+    # MSVS default is dymanic
+    if (sys.platform == 'win32' and
+        ((sys.version_info[0] == 3 and sys.version_info[1] == 5) or
+         (sys.version_info[0] == 3 and sys.version_info[1] == 6))):
+      extra_compile_args.append('/MT')
+
     if "clang" in os.popen('$CC --version 2> /dev/null').read():
       extra_compile_args.append('-Wno-shorten-64-to-32')
 
@@ -217,7 +235,7 @@ def get_option_from_sys_argv(option_str):
         Extension(
             "google.protobuf.internal._api_implementation",
             glob.glob('google/protobuf/internal/api_implementation.cc'),
-            extra_compile_args=['-DPYTHON_PROTO2_CPP_IMPL_V2'],
+            extra_compile_args=extra_compile_args + ['-DPYTHON_PROTO2_CPP_IMPL_V2'],
         ),
     ])
     os.environ['PROTOCOL_BUFFERS_PYTHON_IMPLEMENTATION'] = 'cpp'
diff --git a/ruby/google-protobuf.gemspec b/ruby/google-protobuf.gemspec
index 8fcf85c7f8816..c09a7f2451826 100644
--- a/ruby/google-protobuf.gemspec
+++ b/ruby/google-protobuf.gemspec
@@ -1,6 +1,6 @@
 Gem::Specification.new do |s|
   s.name        = "google-protobuf"
-  s.version     = "3.5.1.2"
+  s.version     = "3.5.2"
   s.licenses    = ["BSD-3-Clause"]
   s.summary     = "Protocol Buffers"
   s.description = "Protocol Buffers are Google's data interchange format."