diff --git a/contrib/gitian-descriptors/boost-win32.yml b/contrib/gitian-descriptors/boost-win32.yml
index 61ea50e4f..2af91d1ed 100644
--- a/contrib/gitian-descriptors/boost-win32.yml
+++ b/contrib/gitian-descriptors/boost-win32.yml
@@ -11,12 +11,12 @@ packages:
 reference_datetime: "2011-01-30 00:00:00"
 remotes: []
 files:
-- "boost_1_47_0.tar.bz2"
+- "boost_1_49_0.tar.bz2"
 script: |
   TMPDIR="$HOME/tmpdir"
   mkdir -p $TMPDIR/bin/$GBUILD_BITS $TMPDIR/include
-  tar xjf boost_1_47_0.tar.bz2
-  cd boost_1_47_0
+  tar xjf boost_1_49_0.tar.bz2
+  cd boost_1_49_0
   echo "using gcc : 4.4 : i586-mingw32msvc-g++
         :
         <rc>i586-mingw32msvc-windres
@@ -34,5 +34,5 @@ script: |
   cd $TMPDIR
   export LD_PRELOAD=/usr/lib/faketime/libfaketime.so.1
   export FAKETIME=$REFERENCE_DATETIME
-  zip -r boost-win32-1.47.0-gitian.zip *
-  cp boost-win32-1.47.0-gitian.zip $OUTDIR
+  zip -r boost-win32-1.49.0-gitian.zip *
+  cp boost-win32-1.49.0-gitian.zip $OUTDIR
diff --git a/contrib/gitian-descriptors/gitian-win32.yml b/contrib/gitian-descriptors/gitian-win32.yml
index 9752626d6..21b03b387 100644
--- a/contrib/gitian-descriptors/gitian-win32.yml
+++ b/contrib/gitian-descriptors/gitian-win32.yml
@@ -16,7 +16,7 @@ remotes:
   "dir": "bitcoin"
 files:
 - "qt-win32-4.7.4-gitian.zip"
-- "boost-win32-1.47.0-gitian.zip"
+- "boost-win32-1.49.0-gitian.zip"
 - "bitcoin-deps-0.0.4.zip"
 script: |
   #
@@ -26,10 +26,10 @@ script: |
   cd $HOME/build/
   export PATH=$PATH:$HOME/qt/bin/
   #
-  mkdir boost_1_47_0
-  cd boost_1_47_0
+  mkdir boost_1_49_0
+  cd boost_1_49_0
   mkdir -p stage/lib
-  unzip ../boost-win32-1.47.0-gitian.zip
+  unzip ../boost-win32-1.49.0-gitian.zip
   cd bin/$GBUILD_BITS
   for lib in *; do
     i586-mingw32msvc-ar rc ../../stage/lib/libboost_${lib}-mt-s.a $lib/*.o
diff --git a/src/makefile.linux-mingw b/src/makefile.linux-mingw
index 51f49bb3c..3e7b301ca 100644
--- a/src/makefile.linux-mingw
+++ b/src/makefile.linux-mingw
@@ -7,14 +7,14 @@ DEPSDIR:=/usr/i586-mingw32msvc
 USE_UPNP:=0
 
 INCLUDEPATHS= \
- -I"$(DEPSDIR)/boost_1_47_0" \
+ -I"$(DEPSDIR)/boost_1_49_0" \
  -I"$(DEPSDIR)/db-4.8.30.NC/build_unix" \
  -I"$(DEPSDIR)/openssl-1.0.1b/include" \
  -I"$(DEPSDIR)" \
  -I"$(CURDIR)"/obj \
 
 LIBPATHS= \
- -L"$(DEPSDIR)/boost_1_47_0/stage/lib" \
+ -L"$(DEPSDIR)/boost_1_49_0/stage/lib" \
  -L"$(DEPSDIR)/db-4.8.30.NC/build_unix" \
  -L"$(DEPSDIR)/openssl-1.0.1b"
 
diff --git a/src/makefile.mingw b/src/makefile.mingw
index 577c77b7d..92dfa3b16 100644
--- a/src/makefile.mingw
+++ b/src/makefile.mingw
@@ -5,20 +5,20 @@
 USE_UPNP:=0
 
 INCLUDEPATHS= \
- -I"C:\boost-1.47.0-mgw" \
+ -I"C:\boost-1.49.0-mgw" \
  -I"C:\db-4.8.30.NC-mgw\build_unix" \
  -I"C:\openssl-1.0.0d-mgw\include"
 
 LIBPATHS= \
- -L"C:\boost-1.47.0-mgw\stage\lib" \
+ -L"C:\boost-1.49.0-mgw\stage\lib" \
  -L"C:\db-4.8.30.NC-mgw\build_unix" \
  -L"C:\openssl-1.0.0d-mgw"
 
 LIBS= \
- -l boost_system-mgw45-mt-s-1_47 \
- -l boost_filesystem-mgw45-mt-s-1_47 \
- -l boost_program_options-mgw45-mt-s-1_47 \
- -l boost_thread-mgw45-mt-s-1_47 \
+ -l boost_system-mgw45-mt-s-1_49 \
+ -l boost_filesystem-mgw45-mt-s-1_49 \
+ -l boost_program_options-mgw45-mt-s-1_49 \
+ -l boost_thread-mgw45-mt-s-1_49 \
  -l db_cxx \
  -l ssl \
  -l crypto