diff --git a/.travis.yml b/.travis.yml
index f6dc47d8297175..8263d0286adfea 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -7,6 +7,9 @@ x-ccache-setup-steps: &ccache-setup-steps
 os: linux
 dist: xenial
 language: cpp
+env:
+  global:
+    - PYTHON_VERSION="2.7.15"
 jobs:
   include:
     - stage: "Compile"
@@ -20,7 +23,7 @@ jobs:
             - g++-6
       install: *ccache-setup-steps
       script:
-        - pyenv global 2.7.15
+        - pyenv global ${PYTHON_VERSION}
         - ./configure
         - make -j2 -C out V=1 v8
 
@@ -34,7 +37,7 @@ jobs:
             - g++-6
       install: *ccache-setup-steps
       script:
-        - pyenv global 2.7.15
+        - pyenv global ${PYTHON_VERSION}
         - ./configure
         - make -j2 V=1
         - cp out/Release/node /home/travis/.ccache
@@ -47,7 +50,7 @@ jobs:
         - mkdir -p out/Release
         - cp /home/travis/.ccache/node out/Release/node
       script:
-        - pyenv global 2.7.15
+        - pyenv global ${PYTHON_VERSION}
         - python tools/test.py -j 2 -p dots --report --mode=release --flaky-tests=dontcare default
 
     - name: "Test C++ Suites"
@@ -63,7 +66,7 @@ jobs:
         - cp /home/travis/.ccache/cctest out/Release/cctest
         - touch config.gypi
       script:
-        - pyenv global 2.7.15
+        - pyenv global ${PYTHON_VERSION}
         - out/Release/cctest
         - make -j1 V=1 test/addons/.buildstamp test/js-native-api/.buildstamp test/node-api/.buildstamp
         - python tools/test.py -j 2 -p dots --report --mode=release --flaky-tests=dontcare addons js-native-api node-api
@@ -72,7 +75,7 @@ jobs:
       language: node_js
       node_js: "node"
       install:
-        - pyenv global 2.7.15
+        - pyenv global ${PYTHON_VERSION}
         - make lint-py-build || true
       script:
         - NODE=$(which node) make lint lint-py
diff --git a/LICENSE b/LICENSE
index 1f2435a7225834..fe7f7b1c886878 100644
--- a/LICENSE
+++ b/LICENSE
@@ -1506,4 +1506,4 @@ The externally maintained libraries used by Node.js are:
     WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
     ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
     OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
-  """
+  """
\ No newline at end of file
diff --git a/configure.py b/configure.py
index 6a0bfd08609cd6..ad62925c86dfc4 100755
--- a/configure.py
+++ b/configure.py
@@ -11,7 +11,6 @@
 import shlex
 import subprocess
 import shutil
-import string
 from distutils.spawn import find_executable as which
 
 # If not run from node/, cd to node/.
@@ -675,8 +674,8 @@ def try_check_compiler(cc, lang):
   except OSError:
     return (False, False, '', '')
 
-  proc.stdin.write('__clang__ __GNUC__ __GNUC_MINOR__ __GNUC_PATCHLEVEL__ '
-                   '__clang_major__ __clang_minor__ __clang_patchlevel__')
+  proc.stdin.write(b'__clang__ __GNUC__ __GNUC_MINOR__ __GNUC_PATCHLEVEL__ '
+                   b'__clang_major__ __clang_minor__ __clang_patchlevel__')
 
   values = (proc.communicate()[0].split() + ['0'] * 7)[0:7]
   is_clang = values[0] == '1'
@@ -753,7 +752,7 @@ def get_gas_version(cc):
        consider adjusting the CC environment variable if you installed
        it in a non-standard prefix.''')
 
-  gas_ret = proc.communicate()[1]
+  gas_ret = str(proc.communicate()[1])
   match = re.match(r"GNU assembler version ([2-9]\.[0-9]+)", gas_ret)
 
   if match:
@@ -818,7 +817,7 @@ def cc_macros(cc=None):
        consider adjusting the CC environment variable if you installed
        it in a non-standard prefix.''')
 
-  p.stdin.write('\n')
+  p.stdin.write(b'\n')
   out = p.communicate()[0]
 
   out = str(out).split('\n')
@@ -1311,7 +1310,7 @@ def glob_to_var(dir_base, dir_sub, patch_dir):
 
 def configure_intl(o):
   def icu_download(path):
-    depFile = 'tools/icu/current_ver.dep';
+    depFile = 'tools/icu/current_ver.dep'
     with open(depFile) as f:
       icus = json.load(f)
     # download ICU, if needed
@@ -1380,7 +1379,7 @@ def write_config(data, name):
     o['variables']['icu_small'] = b(True)
     locs = set(options.with_icu_locales.split(','))
     locs.add('root')  # must have root
-    o['variables']['icu_locales'] = string.join(locs,',')
+    o['variables']['icu_locales'] = ','.join(str(loc) for loc in locs)
     # We will check a bit later if we can use the canned deps/icu-small
   elif with_intl == 'full-icu':
     # full ICU
@@ -1520,7 +1519,7 @@ def write_config(data, name):
   elif int(icu_ver_major) < icu_versions['minimum_icu']:
     error('icu4c v%s.x is too old, v%d.x or later is required.' %
           (icu_ver_major, icu_versions['minimum_icu']))
-  icu_endianness = sys.byteorder[0];
+  icu_endianness = sys.byteorder[0]
   o['variables']['icu_ver_major'] = icu_ver_major
   o['variables']['icu_endianness'] = icu_endianness
   icu_data_file_l = 'icudt%s%s.dat' % (icu_ver_major, 'l')
diff --git a/deps/v8/third_party/inspector_protocol/code_generator.py b/deps/v8/third_party/inspector_protocol/code_generator.py
index 18777d0ff8951a..753bc5f825e6b2 100755
--- a/deps/v8/third_party/inspector_protocol/code_generator.py
+++ b/deps/v8/third_party/inspector_protocol/code_generator.py
@@ -62,15 +62,24 @@ def init_defaults(config_tuple, path, defaults):
         jinja_dir = arg_options.jinja_dir
         if not jinja_dir:
             raise Exception("jinja directory must be specified")
-        jinja_dir = jinja_dir.decode('utf8')
+        try:
+            jinja_dir = jinja_dir.decode('utf8')
+        except AttributeError:  # Python 3
+            pass
         output_base = arg_options.output_base
         if not output_base:
             raise Exception("Base output directory must be specified")
-        output_base = output_base.decode('utf8')
+        try:
+            output_base = output_base.decode('utf8')
+        except AttributeError:  # Python 3
+            pass
         config_file = arg_options.config
         if not config_file:
             raise Exception("Config file name must be specified")
-        config_file = config_file.decode('utf8')
+        try:
+            config_file = config_file.decode('utf8')
+        except AttributeError:  # Python 3
+            pass
         config_base = os.path.dirname(config_file)
         config_values = arg_options.config_value
         if not config_values:
diff --git a/deps/v8/tools/gen-postmortem-metadata.py b/deps/v8/tools/gen-postmortem-metadata.py
index 48265b24185e7b..d66c07b4f0a74b 100644
--- a/deps/v8/tools/gen-postmortem-metadata.py
+++ b/deps/v8/tools/gen-postmortem-metadata.py
@@ -636,9 +636,7 @@ def emit_config():
 
         out.write('/* class type information */\n');
         consts = [];
-        keys = typeclasses.keys();
-        keys.sort();
-        for typename in keys:
+        for typename in sorted(typeclasses):
                 klass = typeclasses[typename];
                 consts.append({
                     'name': 'type_%s__%s' % (klass, typename),
@@ -649,9 +647,7 @@ def emit_config():
 
         out.write('/* class hierarchy information */\n');
         consts = [];
-        keys = klasses.keys();
-        keys.sort();
-        for klassname in keys:
+        for klassname in sorted(klasses):
                 pklass = klasses[klassname]['parent'];
                 bklass = get_base_class(klassname);
                 if (bklass != 'Object'):
diff --git a/tools/configure.d/nodedownload.py b/tools/configure.d/nodedownload.py
index 53d2692ed15dca..dfd79c995a6dd8 100644
--- a/tools/configure.d/nodedownload.py
+++ b/tools/configure.d/nodedownload.py
@@ -2,27 +2,30 @@
 # Moved some utilities here from ../../configure
 
 from __future__ import print_function
-import urllib
 import hashlib
 import sys
 import zipfile
 import tarfile
-import fpformat
 import contextlib
+try:
+    from urllib.request import FancyURLopener, URLopener
+except ImportError:
+    from urllib import FancyURLopener, URLopener
 
 def formatSize(amt):
     """Format a size as a string in MB"""
-    return fpformat.fix(amt / 1024000., 1)
+    # return fpformat.fix(amt / 1024000., 1)
+    return "%.1f" % (amt / 1024000.)
 
 def spin(c):
     """print out an ASCII 'spinner' based on the value of counter 'c'"""
     spin = ".:|'"
     return (spin[c % len(spin)])
 
-class ConfigOpener(urllib.FancyURLopener):
+class ConfigOpener(FancyURLopener):
     """fancy opener used by retrievefile. Set a UA"""
     # append to existing version (UA)
-    version = '%s node.js/configure' % urllib.URLopener.version
+    version = '%s node.js/configure' % URLopener.version
 
 def reporthook(count, size, total):
     """internal hook used by retrievefile"""