diff --git a/BUNDLER_VERSION.txt b/BUNDLER_VERSION.txt
new file mode 100644
index 0000000..bbf649f
--- /dev/null
+++ b/BUNDLER_VERSION.txt
@@ -0,0 +1 @@
+1.7.3
\ No newline at end of file
diff --git a/linux/build b/linux/build
index 33f4839..3738189 100755
--- a/linux/build
+++ b/linux/build
@@ -118,6 +118,7 @@ exec docker run \
 	-e "APP_UID=`id -u`" \
 	-e "APP_GID=`id -g`" \
 	-e "RUBY_VERSION=`cat \"$SELFDIR/../RUBY_VERSION.txt\"`" \
+	-e "BUNDLER_VERSION=`cat \"$SELFDIR/../BUNDLER_VERSION.txt\"`" \
 	-e "ARCHITECTURE=$ARCHITECTURE" \
 	-e "CONCURRENCY=$CONCURRENCY" \
 	-e "SETUP_SOURCE=$SETUP_SOURCE" \
diff --git a/linux/internal/build b/linux/internal/build
index bc91f61..0abdfb2 100755
--- a/linux/internal/build
+++ b/linux/internal/build
@@ -24,6 +24,7 @@ echo $ARCHITECTURE > $ROOT/system/NAME
 echo $APP_UID > $ROOT/system/APP_UID
 echo $APP_GID > $ROOT/system/APP_GID
 echo $RUBY_VERSION > $ROOT/system/RUBY_VERSION
+echo $BUNDLER_VERSION > $ROOT/system/BUNDLER_VERSION
 echo $CONCURRENCY > $ROOT/system/CONCURRENCY
 echo $SETUP_SOURCE > $ROOT/system/SETUP_SOURCE
 echo $COMPILE > $ROOT/system/COMPILE
diff --git a/linux/internal/build-inside-mock b/linux/internal/build-inside-mock
index e548296..219487f 100755
--- a/linux/internal/build-inside-mock
+++ b/linux/internal/build-inside-mock
@@ -7,6 +7,7 @@ NAME=`cat /system/NAME`
 APP_UID=`cat /system/APP_UID`
 APP_GID=`cat /system/APP_GID`
 RUBY_VERSION=`cat /system/RUBY_VERSION`
+BUNDLER_VERSION=`cat /system/BUNDLER_VERSION`
 CONCURRENCY=`cat /system/CONCURRENCY`
 SETUP_SOURCE=`cat /system/SETUP_SOURCE`
 COMPILE=`cat /system/COMPILE`
@@ -171,7 +172,7 @@ echo $GEM_EXTENSION_API_VERSION > /tmp/ruby/info/GEM_EXTENSION_API_VERSION
 run rm -rf /tmp/ruby/lib/ruby/gems/$RUBY_COMPAT_VERSION/gems/{test-unit,rdoc}-*
 
 if [[ -e /system/Gemfile ]]; then
-	run /tmp/ruby/bin/gem install bundler --no-rdoc --no-ri
+	run /tmp/ruby/bin/gem install bundler -v $BUNDLER_VERSION --no-rdoc --no-ri
 	run cp /system/Gemfile* /tmp/ruby
 	echo "+ Entering /tmp/ruby"
 	pushd /tmp/ruby >/dev/null
diff --git a/osx/build b/osx/build
index f17c69f..1141388 100755
--- a/osx/build
+++ b/osx/build
@@ -5,6 +5,7 @@ SELFDIR=`dirname "$0"`
 SELFDIR=`cd "$SELFDIR" && pwd`
 source "$SELFDIR/internal/reset_environment.sh"
 source "$SELFDIR/../shared/library.sh"
+BUNDLER_VERSION=`cat "$SELFDIR/../BUNDLER_VERSION.txt"`
 
 WORKDIR=
 OWNS_WORKDIR=true
@@ -263,10 +264,10 @@ if [[ "$GEMFILE" != "" ]]; then
 	fi
 
 	# Install Bundler, either from cache or directly.
-	if [[ -e "$RUNTIME_DIR/vendor/cache/bundler-1.7.3.gem" ]]; then
-		run /tmp/ruby/bin/gem install "$RUNTIME_DIR/vendor/cache/bundler-1.7.3.gem" --no-rdoc --no-ri
+	if [[ -e "$RUNTIME_DIR/vendor/cache/bundler-$BUNDLER_VERSION.gem" ]]; then
+		run /tmp/ruby/bin/gem install "$RUNTIME_DIR/vendor/cache/bundler-$BUNDLER_VERSION.gem" --no-rdoc --no-ri
 	else
-		run /tmp/ruby/bin/gem install bundler -v 1.7.3 --no-rdoc --no-ri
+		run /tmp/ruby/bin/gem install bundler -v $BUNDLER_VERSION --no-rdoc --no-ri
 	fi
 
 	# Run bundle install.
@@ -281,7 +282,7 @@ if [[ "$GEMFILE" != "" ]]; then
 	run /tmp/ruby/bin/bundle package
 	run rm -rf "$RUNTIME_DIR/vendor"
 	run mv vendor "$RUNTIME_DIR/"
-	run cp /tmp/ruby/lib/ruby/gems/$RUBY_COMPAT_VERSION/cache/bundler-1.7.3.gem "$RUNTIME_DIR/vendor/cache/"
+	run cp /tmp/ruby/lib/ruby/gems/$RUBY_COMPAT_VERSION/cache/bundler-$BUNDLER_VERSION.gem "$RUNTIME_DIR/vendor/cache/"
 	run rm -rf Gemfile* .bundle
 	echo "+ Leaving /tmp/ruby"
 	popd >/dev/null
diff --git a/shared/package b/shared/package
index c0e0bf9..82e7097 100755
--- a/shared/package
+++ b/shared/package
@@ -4,6 +4,7 @@ set -e
 SELFDIR=`dirname "$0"`
 SELFDIR=`cd "$SELFDIR" && pwd`
 source "$SELFDIR/library.sh"
+BUNDLER_VERSION=`cat "$SELFDIR/../BUNDLER_VERSION.txt"`
 
 BUILD_OUTPUT_DIR=
 RUBY_PACKAGE=
@@ -108,7 +109,9 @@ if [[ "$RUBY_PACKAGE" != "" ]]; then
 		--exclude "lib/ruby/gems/$RUBY_COMPAT_VERSION/specifications/" \
 		.
 	run tar -rf "$RUBY_PACKAGE.tmp" -C "$BUILD_OUTPUT_DIR" \
-		"./lib/ruby/gems/$RUBY_COMPAT_VERSION/specifications/default/"
+		"./lib/ruby/gems/$RUBY_COMPAT_VERSION/gems/bundler-$BUNDLER_VERSION" \
+		"./lib/ruby/gems/$RUBY_COMPAT_VERSION/specifications/bundler-$BUNDLER_VERSION.gemspec" \
+		"./lib/ruby/gems/$RUBY_COMPAT_VERSION/specifications/default"
 	echo "+ gzip --best --no-name -c $RUBY_PACKAGE.tmp > $RUBY_PACKAGE"
 	gzip --best --no-name -c "$RUBY_PACKAGE.tmp" > "$RUBY_PACKAGE"
 	run rm "$RUBY_PACKAGE.tmp"