diff --git a/apache2/Makefile.win b/apache2/Makefile.win
index fe4a70ac..ca6cffb4 100644
--- a/apache2/Makefile.win
+++ b/apache2/Makefile.win
@@ -40,7 +40,7 @@ INCLUDES = $(INCLUDES) -I$(LUA)\include -I$(LUA) \
 
 # Yajl/Json is optional
 !IF "$(YAJL)" != ""
-LIBS = $(LIBS) $(YAJL)\yajl.lib
+LIBS = $(LIBS) $(YAJL)\lib\yajl.lib
 DEFS=$(DEFS) -DWITH_YAJL
 INCLUDES = $(INCLUDES) -I$(YAJL)\include -I$(YAJL) \
 !ENDIF
diff --git a/iis/Makefile.win b/iis/Makefile.win
index 8e81c287..578ea678 100644
--- a/iis/Makefile.win
+++ b/iis/Makefile.win
@@ -43,7 +43,7 @@ INCLUDES = $(INCLUDES) -I$(LUA)\include -I$(LUA) \
 
 # Yajl/Json is optional
 !IF "$(YAJL)" != ""
-LIBS = $(LIBS) $(YAJL)\yajl.lib
+LIBS = $(LIBS) $(YAJL)\lib\yajl.lib
 DEFS=$(DEFS) -DWITH_YAJL
 INCLUDES = $(INCLUDES) -I$(YAJL)\include -I$(YAJL) \
 !ENDIF
diff --git a/iis/ModSecurityIIS.vcxproj b/iis/ModSecurityIIS.vcxproj
index 5697fd51..abe9f630 100755
--- a/iis/ModSecurityIIS.vcxproj
+++ b/iis/ModSecurityIIS.vcxproj
@@ -83,7 +83,7 @@
   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
     <ClCompile>
       <Optimization>Disabled</Optimization>
-      <AdditionalIncludeDirectories>dependencies\build_dir\pcre\include;dependencies\build_dir\pcre;dependencies\build_dir\libxml2\include;dependencies\build_dir\apache24\include;..\apache2;..\standalone</AdditionalIncludeDirectories>
+      <AdditionalIncludeDirectories>dependencies\build_dir\pcre\include;dependencies\build_dir\pcre;dependencies\build_dir\libxml2\include;dependencies\build_dir\apache24\include;..\apache2;..\standalone;dependencies\build_dir\lloyd-yajl-f4b2b1a\build\yajl-2.0.1\include;</AdditionalIncludeDirectories>
       <PreprocessorDefinitions>_MBCS;%(PreprocessorDefinitions);WIN32;WINNT;inline=APR_INLINE;AP_DECLARE_STATIC;VERSION_IIS</PreprocessorDefinitions>
       <PrecompiledHeader>NotUsing</PrecompiledHeader>
       <PrecompiledHeaderFile>precomp.h</PrecompiledHeaderFile>
@@ -93,7 +93,7 @@
     <Link>
       <ModuleDefinitionFile>mymodule.def</ModuleDefinitionFile>
       <GenerateDebugInformation>true</GenerateDebugInformation>
-      <AdditionalDependencies>kernel32.lib;user32.lib;gdi32.lib;winspool.lib;comdlg32.lib;advapi32.lib;shell32.lib;ole32.lib;oleaut32.lib;uuid.lib;odbc32.lib;odbccp32.lib;ws2_32.lib;%(AdditionalDependencies);dependencies\build_dir\apache24\lib\libapr-1.lib;dependencies\build_dir\apache24\lib\libaprutil-1.lib;dependencies\build_dir\pcre\pcre.lib;dependencies\build_dir\libxml2\win32\bin.msvc\libxml2.lib</AdditionalDependencies>
+      <AdditionalDependencies>kernel32.lib;user32.lib;gdi32.lib;winspool.lib;comdlg32.lib;advapi32.lib;shell32.lib;ole32.lib;oleaut32.lib;uuid.lib;odbc32.lib;odbccp32.lib;ws2_32.lib;%(AdditionalDependencies);dependencies\build_dir\apache24\lib\libapr-1.lib;dependencies\build_dir\apache24\lib\libaprutil-1.lib;dependencies\build_dir\pcre\pcre.lib;dependencies\build_dir\libxml2\win32\bin.msvc\libxml2.lib;dependencies\build_dir\yajl\build\yajl-2.0.1\lib\yajl.lib</AdditionalDependencies>
     </Link>
     <PostBuildEvent>
       <Command>
@@ -103,7 +103,7 @@
   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
     <ClCompile>
       <Optimization>Disabled</Optimization>
-      <AdditionalIncludeDirectories>dependencies\build_dir\pcre\include;dependencies\build_dir\pcre;dependencies\build_dir\libxml2\include;..\apache2;..\standalone;dependencies\build_dir\apache24\include</AdditionalIncludeDirectories>
+      <AdditionalIncludeDirectories>dependencies\build_dir\pcre\include;dependencies\build_dir\pcre;dependencies\build_dir\libxml2\include;..\apache2;..\standalone;dependencies\build_dir\apache24\include;dependencies\build_dir\lloyd-yajl-f4b2b1a\build\yajl-2.0.1\include;</AdditionalIncludeDirectories>
       <PreprocessorDefinitions>_MBCS;%(PreprocessorDefinitions);WIN32;WINNT;inline=APR_INLINE;AP_DECLARE_STATIC</PreprocessorDefinitions>
       <PrecompiledHeader>NotUsing</PrecompiledHeader>
       <PrecompiledHeaderFile>precomp.h</PrecompiledHeaderFile>
@@ -113,7 +113,7 @@
     <Link>
       <ModuleDefinitionFile>mymodule.def</ModuleDefinitionFile>
       <GenerateDebugInformation>true</GenerateDebugInformation>
-      <AdditionalDependencies>kernel32.lib;IPHLPAPI.lib;user32.lib;gdi32.lib;winspool.lib;comdlg32.lib;advapi32.lib;shell32.lib;ole32.lib;oleaut32.lib;uuid.lib;odbc32.lib;odbccp32.lib;ws2_32.lib;%(AdditionalDependencies);dependencies\build_dir\apache24\lib\libapr-1.lib;dependencies\build_dir\apache24\lib\libaprutil-1.lib;dependencies\build_dir\pcre\pcre.lib;dependencies\build_dir\libxml2\win32\bin.msvc\libxml2.lib</AdditionalDependencies>
+      <AdditionalDependencies>kernel32.lib;IPHLPAPI.lib;user32.lib;gdi32.lib;winspool.lib;comdlg32.lib;advapi32.lib;shell32.lib;ole32.lib;oleaut32.lib;uuid.lib;odbc32.lib;odbccp32.lib;ws2_32.lib;%(AdditionalDependencies);dependencies\build_dir\apache24\lib\libapr-1.lib;dependencies\build_dir\apache24\lib\libaprutil-1.lib;dependencies\build_dir\pcre\pcre.lib;dependencies\build_dir\libxml2\win32\bin.msvc\libxml2.lib;dependencies\build_dir\yajl\build\yajl-2.0.1\lib\yajl.lib;</AdditionalDependencies>
       <AdditionalLibraryDirectories>C:\core__\ModSecurity\iis\release\x64</AdditionalLibraryDirectories>
       <AdditionalOptions> /LIBPATH:"C:\core__\ModSecurity\iis\release\x64" %(AdditionalOptions)</AdditionalOptions>
     </Link>
@@ -126,11 +126,11 @@
     <ClCompile>
       <PreprocessorDefinitions>_MBCS;%(PreprocessorDefinitions);WIN32;WINNT;inline=APR_INLINE;AP_DECLARE_STATIC;VERSION_IIS</PreprocessorDefinitions>
       <PrecompiledHeader>NotUsing</PrecompiledHeader>
-      <AdditionalIncludeDirectories>dependencies\build_dir\pcre\include;dependencies\build_dir\pcre;dependencies\build_dir\libxml2\include;..\apache2;..\standalone</AdditionalIncludeDirectories>
+      <AdditionalIncludeDirectories>dependencies\build_dir\pcre\include;dependencies\build_dir\pcre;dependencies\build_dir\libxml2\include;..\apache2;..\standalone;dependencies\build_dir\lloyd-yajl-f4b2b1a\build\yajl-2.0.1\include;</AdditionalIncludeDirectories>
     </ClCompile>
     <Link>
       <ModuleDefinitionFile>mymodule.def</ModuleDefinitionFile>
-      <AdditionalDependencies>kernel32.lib;user32.lib;gdi32.lib;winspool.lib;comdlg32.lib;advapi32.lib;shell32.lib;ole32.lib;oleaut32.lib;uuid.lib;odbc32.lib;odbccp32.lib;ws2_32.lib;%(AdditionalDependencies);dependencies\build_dir\apache24\lib\libapr-1.lib;dependencies\build_dir\apache24\lib\libaprutil-1.lib;dependencies\build_dir\pcre\pcre.lib;dependencies\build_dir\libxml2\win32\bin.msvc\libxml2.lib</AdditionalDependencies>
+      <AdditionalDependencies>kernel32.lib;user32.lib;gdi32.lib;winspool.lib;comdlg32.lib;advapi32.lib;shell32.lib;ole32.lib;oleaut32.lib;uuid.lib;odbc32.lib;odbccp32.lib;ws2_32.lib;%(AdditionalDependencies);dependencies\build_dir\apache24\lib\libapr-1.lib;dependencies\build_dir\apache24\lib\libaprutil-1.lib;dependencies\build_dir\pcre\pcre.lib;dependencies\build_dir\libxml2\win32\bin.msvc\libxml2.lib;dependencies\build_dir\yajl\build\yajl-2.0.1\lib\yajl.lib</AdditionalDependencies>
     </Link>
     <PostBuildEvent>
       <Command>
@@ -141,11 +141,11 @@
     <ClCompile>
       <PreprocessorDefinitions>_MBCS;%(PreprocessorDefinitions);WIN32;WINNT;inline=APR_INLINE;AP_DECLARE_STATIC</PreprocessorDefinitions>
       <PrecompiledHeader>NotUsing</PrecompiledHeader>
-      <AdditionalIncludeDirectories>dependencies\build_dir\pcre\include;dependencies\build_dir\pcre;dependencies\build_dir\libxml2\include;..\apache2;..\standalone;dependencies\build_dir\apache24\include</AdditionalIncludeDirectories>
+      <AdditionalIncludeDirectories>dependencies\build_dir\pcre\include;dependencies\build_dir\pcre;dependencies\build_dir\libxml2\include;..\apache2;..\standalone;dependencies\build_dir\apache24\include;dependencies\build_dir\lloyd-yajl-f4b2b1a\build\yajl-2.0.1\include;</AdditionalIncludeDirectories>
     </ClCompile>
     <Link>
       <ModuleDefinitionFile>mymodule.def</ModuleDefinitionFile>
-      <AdditionalDependencies>kernel32.lib;IPHLPAPI.lib;user32.lib;gdi32.lib;winspool.lib;comdlg32.lib;advapi32.lib;shell32.lib;ole32.lib;oleaut32.lib;uuid.lib;odbc32.lib;odbccp32.lib;ws2_32.lib;%(AdditionalDependencies);dependencies\build_dir\apache24\lib\libapr-1.lib;dependencies\build_dir\apache24\lib\libaprutil-1.lib;dependencies\build_dir\pcre\pcre.lib;dependencies\build_dir\libxml2\win32\bin.msvc\libxml2.lib</AdditionalDependencies>
+      <AdditionalDependencies>kernel32.lib;IPHLPAPI.lib;user32.lib;gdi32.lib;winspool.lib;comdlg32.lib;advapi32.lib;shell32.lib;ole32.lib;oleaut32.lib;uuid.lib;odbc32.lib;odbccp32.lib;ws2_32.lib;%(AdditionalDependencies);dependencies\build_dir\apache24\lib\libapr-1.lib;dependencies\build_dir\apache24\lib\libaprutil-1.lib;dependencies\build_dir\pcre\pcre.lib;dependencies\build_dir\libxml2\win32\bin.msvc\libxml2.lib;dependencies\build_dir\yajl\build\yajl-2.0.1\lib\yajl.lib;</AdditionalDependencies>
       <AdditionalLibraryDirectories>
       </AdditionalLibraryDirectories>
       <GenerateDebugInformation>false</GenerateDebugInformation>
@@ -167,6 +167,7 @@
     <ClCompile Include="..\apache2\msc_crypt.c" />
     <ClCompile Include="..\apache2\msc_geo.c" />
     <ClCompile Include="..\apache2\msc_gsb.c" />
+    <ClCompile Include="..\apache2\msc_json.c" />
     <ClCompile Include="..\apache2\msc_logging.c" />
     <ClCompile Include="..\apache2\msc_lua.c" />
     <ClCompile Include="..\apache2\msc_multipart.c" />
@@ -216,6 +217,7 @@
     <ClInclude Include="..\apache2\msc_crypt.h" />
     <ClInclude Include="..\apache2\msc_geo.h" />
     <ClInclude Include="..\apache2\msc_gsb.h" />
+    <ClInclude Include="..\apache2\msc_json.h" />
     <ClInclude Include="..\apache2\msc_logging.h" />
     <ClInclude Include="..\apache2\msc_lua.h" />
     <ClInclude Include="..\apache2\msc_multipart.h" />
diff --git a/iis/build_dependencies.bat b/iis/build_dependencies.bat
index ef0ac23f..58e4ff51 100644
--- a/iis/build_dependencies.bat
+++ b/iis/build_dependencies.bat
@@ -17,6 +17,7 @@
 @set APACHE_SRC=httpd-2.4.6.tar.gz
 @set APACHE_BIN32=httpd-2.4.6-win32-VC11.zip
 @set APACHE_BIN64=httpd-2.4.6-win64-VC11.zip
+@set YAJL=lloyd-yajl-f4b2b1a.zip
 
 :: @set VCARGS32="C:\Program Files (x86)\Microsoft Visual Studio 12.0\VC\bin\vcvars32.bat"
 :: @set VCARGS64="C:\Program Files (x86)\Microsoft Visual Studio 12.0\VC\bin\x86_amd64\vcvarsx86_amd64.bat"
@@ -73,6 +74,11 @@ echo "b"
 @if NOT (%ERRORLEVEL%) == (0) goto build_failed_curl
 @cd "%CURRENT_DIR%"
 
+@echo # yajl - %YAJL%
+@call dependencies/build_yajl.bat
+@if NOT (%ERRORLEVEL%) == (0) goto build_failed_yajl
+@cd "%CURRENT_DIR%"
+
 @echo All dependencies were built successfully.
 @cd "%CURRENT_DIR%"
 @exit /B 0
@@ -109,6 +115,10 @@ echo "b"
 @echo Failed to setup %CURL%...
 @goto failed
 
+:build_failed_yajl
+@echo Failed to setup %YAJL%...
+@goto failed
+
 :failed
 @cd %CURRENT_DIR%
 @exit /B 1
diff --git a/iis/build_modsecurity.bat b/iis/build_modsecurity.bat
index c4874bb8..6def1326 100644
--- a/iis/build_modsecurity.bat
+++ b/iis/build_modsecurity.bat
@@ -15,7 +15,7 @@ set CURRENT_DIR=%cd%
 cd ..\apache2
 del *.obj *.dll *.lib
 del libinjection\*.obj libinjection\*.dll libinjection\*.lib
-NMAKE -f Makefile.win APACHE=..\iis\%DEPENDENCIES_DIR%\Apache24 PCRE=..\iis\%DEPENDENCIES_DIR%\pcre LIBXML2=..\iis\%DEPENDENCIES_DIR%\libxml2 LUA=..\iis\%DEPENDENCIES_DIR%\lua\src VERSION=VERSION_IIS
+NMAKE -f Makefile.win APACHE=..\iis\%DEPENDENCIES_DIR%\Apache24 PCRE=..\iis\%DEPENDENCIES_DIR%\pcre LIBXML2=..\iis\%DEPENDENCIES_DIR%\libxml2 LUA=..\iis\%DEPENDENCIES_DIR%\lua\src VERSION=VERSION_IIS YAJL=..\iis\%DEPENDENCIES_DIR%\yajl\build\yajl-2.0.1
 @if NOT (%ERRORLEVEL%) == (0) goto build_failed
 
 @echo mlogc...
@@ -29,7 +29,7 @@ nmake -f Makefile.win APACHE=..\iis\%DEPENDENCIES_DIR%\Apache24 PCRE=..\iis\%DEP
 cd ..\iis
 del *.obj *.dll *.lib
 nmake -f Makefile.win clean
-NMAKE -f Makefile.win APACHE=..\iis\%DEPENDENCIES_DIR%\Apache24 PCRE=..\iis\%DEPENDENCIES_DIR%\pcre LIBXML2=..\iis\%DEPENDENCIES_DIR%\libxml2 LUA=..\iis\%DEPENDENCIES_DIR%\lua\src VERSION=VERSION_IIS
+NMAKE -f Makefile.win APACHE=..\iis\%DEPENDENCIES_DIR%\Apache24 PCRE=..\iis\%DEPENDENCIES_DIR%\pcre LIBXML2=..\iis\%DEPENDENCIES_DIR%\libxml2 LUA=..\iis\%DEPENDENCIES_DIR%\lua\src VERSION=VERSION_IIS YAJL=..\iis\%DEPENDENCIES_DIR%\yajl\build\yajl-2.0.1
 @if NOT (%ERRORLEVEL%) == (0) goto build_failed
 
 cd %CURRENT_DIR%
diff --git a/iis/dependencies/build_yajl.bat b/iis/dependencies/build_yajl.bat
new file mode 100644
index 00000000..33ebc234
--- /dev/null
+++ b/iis/dependencies/build_yajl.bat
@@ -0,0 +1,39 @@
+cd "%WORK_DIR%"
+
+@if NOT EXIST "%SOURCE_DIR%\%YAJL%" goto file_not_found_bin
+
+7z.exe x "%SOURCE_DIR%\%YAJL%"
+set YAJL_DIR=%YAJL:~0,-4%
+
+move "%YAJL_DIR%" "yajl"
+
+cd "yajl"
+
+mkdir build
+@if NOT (%ERRORLEVEL%) == (0) goto build_failed
+cd build
+@if NOT (%ERRORLEVEL%) == (0) goto build_failed
+cmake -G"NMake Makefiles" -DCMAKE_BUILD_TYPE=Release ..
+@if NOT (%ERRORLEVEL%) == (0) goto build_failed
+nmake
+@if NOT (%ERRORLEVEL%) == (0) goto build_failed
+
+cd "%WORK%"
+
+copy /y "%WORK_DIR%\yajl\build\yajl-2.0.1\lib\yajl.dll" "%OUTPUT_DIR%"
+copy /y "%WORK_DIR%\yajl\build\yajl-2.0.1\lib\yajl.pdb" "%OUTPUT_DIR%"
+copy /y "%WORK_DIR%\yajl\build\yajl-2.0.1\lib\yajl.lib" "%OUTPUT_DIR%"
+copy /y "%WORK_DIR%\yajl\build\yajl-2.0.1\lib\yajl_s.lib" "%OUTPUT_DIR%"
+
+@exit /B 0
+
+:file_not_found_bin
+@echo File not found: "%SOURCE_DIR%\%PCRE%"
+@goto failed
+
+:build_failed
+@echo Problems during the building phase
+@goto failed
+
+:failed
+@exit /B 1
diff --git a/iis/installer.wxs b/iis/installer.wxs
index 747f80f0..83bebf9e 100644
--- a/iis/installer.wxs
+++ b/iis/installer.wxs
@@ -542,6 +542,9 @@
             <Component Id="LUA5.1.DLL" DiskId="1" Guid="F2A09A92-F564-4C93-AB17-569A6FDA3A7C">
                 <File Id="LUA5.1.DLL" Name="lua5.1.dll" Source="Release\amd64\lua5.1.dll" />
             </Component>
+            <Component Id="YAJL.DLL" DiskId="1" Guid="F2A09A92-F564-4C93-AB17-5ZZA6FDA3A7C">
+                <File Id="AYJL.DLL" Name="yajl.dll" Source="Release\amd64\yajl.dll" />
+            </Component>
             <Component Id="MLOGC.EXE" DiskId="1" Guid="49A1606F-F374-453F-B968-C22CF6FBF9FF">
                 <File Id="MLOGC.EXE" Name="mlogc.exe" Source="Release\amd64\mlogc.exe" />
             </Component>
@@ -575,6 +578,9 @@
             <Component Id="LUA5.1.DLL" DiskId="1" Guid="F2A09A92-F564-4C93-AB17-569A6FDA3A71">
                 <File Id="LUA5.1.DLL" Name="lua5.1.dll" Source="Release\x86\lua5.1.dll" />
             </Component>
+            <Component Id="YAJL.DLL" DiskId="1" Guid="F2A09A92-F564-4CZ3-AB17-5ZZA6FDA3A7C">
+                <File Id="AYJL.DLL" Name="yajl.dll" Source="Release\x86\yajl.dll" />
+            </Component>
             <Component Id="MLOGC.EXE" DiskId="1" Guid="49A1606F-F374-453F-B968-C22CF6FBF9F1">
                 <File Id="MLOGC.EXE" Name="mlogc.exe" Source="Release\x86\mlogc.exe" />
             </Component>
@@ -598,6 +604,7 @@
             <ComponentRef Id="LIBCURL.DLL" />
             <ComponentRef Id="LIBXML2.DLL" />
             <ComponentRef Id="LUA5.1.DLL" />
+            <ComponentRef Id="YAJL.DLL" />
             <ComponentRef Id="MLOGC.EXE" />
             <ComponentRef Id="MODSECURITYIIS.DLL" />
             <ComponentRef Id="PCRE.DLL" />