diff --git a/wetb/fast/fast_io.py b/wetb/fast/fast_io.py
index 78e4859f016d3e1ff218fed3b532d16aba65e909..706420b1ef5152977a7496d5c7c69d2eea1439f6 100644
--- a/wetb/fast/fast_io.py
+++ b/wetb/fast/fast_io.py
@@ -7,7 +7,7 @@ from __future__ import division
 from __future__ import unicode_literals
 from __future__ import print_function
 from __future__ import absolute_import
-from builtins import open
+from io import open
 from builtins import map
 from builtins import range
 from future import standard_library
diff --git a/wetb/hawc2/Hawc2io.py b/wetb/hawc2/Hawc2io.py
index a07fa475fb5e17ba9cc240c1e0b2cbaba625978d..c22c6767b2124ea18d9bd637d26e63e8276fb8a7 100644
--- a/wetb/hawc2/Hawc2io.py
+++ b/wetb/hawc2/Hawc2io.py
@@ -33,7 +33,7 @@ from __future__ import unicode_literals
 from __future__ import absolute_import
 from builtins import int
 from builtins import range
-from builtins import open
+from io import open
 from builtins import str
 from future import standard_library
 standard_library.install_aliases()
diff --git a/wetb/hawc2/ae_file.py b/wetb/hawc2/ae_file.py
index 6d9c81f2cf13f2b918987e5ca4c4526665eb5f64..cee13d9f107fea4ad249ad514e480e70d61d2233 100644
--- a/wetb/hawc2/ae_file.py
+++ b/wetb/hawc2/ae_file.py
@@ -7,7 +7,7 @@ from __future__ import print_function
 from __future__ import unicode_literals
 from __future__ import division
 from __future__ import absolute_import
-from builtins import open
+from io import open
 from builtins import range
 from builtins import int
 from future import standard_library
diff --git a/wetb/hawc2/ascii2bin/ascii2bin.py b/wetb/hawc2/ascii2bin/ascii2bin.py
index f8280ae9ada6c572eb4c207591e8995786e0bf63..4922fe4af2deb4ca0005981a280bd9b1816ece10 100644
--- a/wetb/hawc2/ascii2bin/ascii2bin.py
+++ b/wetb/hawc2/ascii2bin/ascii2bin.py
@@ -2,7 +2,7 @@ from __future__ import print_function
 from __future__ import unicode_literals
 from __future__ import division
 from __future__ import absolute_import
-from builtins import open
+from io import open
 from builtins import int
 from future import standard_library
 standard_library.install_aliases()
diff --git a/wetb/hawc2/ascii2bin/pandas_dat_ascii2bin.py b/wetb/hawc2/ascii2bin/pandas_dat_ascii2bin.py
index 059d581171e59e61b364bebcf9a412e77401a4c1..b6fe5e460f9aa15ecf8d920bb528f079763fb1f2 100644
--- a/wetb/hawc2/ascii2bin/pandas_dat_ascii2bin.py
+++ b/wetb/hawc2/ascii2bin/pandas_dat_ascii2bin.py
@@ -7,7 +7,7 @@ from __future__ import division
 from __future__ import unicode_literals
 from __future__ import print_function
 from __future__ import absolute_import
-from builtins import open
+from io import open
 from future import standard_library
 standard_library.install_aliases()
 
diff --git a/wetb/hawc2/at_time_file.py b/wetb/hawc2/at_time_file.py
index 38cbff60dd6c82d728fc53c2d3ab1a1bcb5418d9..f42519d7a8b6b0fc22607a336f552de8df5f38d8 100644
--- a/wetb/hawc2/at_time_file.py
+++ b/wetb/hawc2/at_time_file.py
@@ -7,7 +7,7 @@ from __future__ import print_function
 from __future__ import unicode_literals
 from __future__ import division
 from __future__ import absolute_import
-from builtins import open
+from io import open
 from builtins import range
 from future import standard_library
 standard_library.install_aliases()
diff --git a/wetb/hawc2/cmp_test_cases.py b/wetb/hawc2/cmp_test_cases.py
index 1745aa455e66087649a605f2586c76d150fca2e4..c8c6dfa3da8b0b600388c08d74a24d8b7db0ec09 100644
--- a/wetb/hawc2/cmp_test_cases.py
+++ b/wetb/hawc2/cmp_test_cases.py
@@ -2,7 +2,7 @@ from __future__ import division
 from __future__ import print_function
 from __future__ import unicode_literals
 from __future__ import absolute_import
-from builtins import open
+from io import open
 from builtins import range
 from builtins import str
 from builtins import zip
diff --git a/wetb/hawc2/htc_file.py b/wetb/hawc2/htc_file.py
index 7893858db89cd7587f141775dc6702bf1b018f17..d7fb82edb116745282959a938331a03e2592533e 100644
--- a/wetb/hawc2/htc_file.py
+++ b/wetb/hawc2/htc_file.py
@@ -10,7 +10,7 @@ from __future__ import print_function
 from __future__ import unicode_literals
 from __future__ import division
 from __future__ import absolute_import
-from builtins import open
+from io import open
 from builtins import str
 from future import standard_library
 standard_library.install_aliases()
diff --git a/wetb/hawc2/log_file.py b/wetb/hawc2/log_file.py
index fec59087fb398479ed90fe18e49ed113250d5263..e6ba440670e524ab1cd13cee945837ffb34880f8 100644
--- a/wetb/hawc2/log_file.py
+++ b/wetb/hawc2/log_file.py
@@ -7,7 +7,7 @@ from __future__ import print_function
 from __future__ import division
 from __future__ import unicode_literals
 from __future__ import absolute_import
-from builtins import open
+from io import open
 from builtins import int
 from future import standard_library
 standard_library.install_aliases()
diff --git a/wetb/hawc2/pc_file.py b/wetb/hawc2/pc_file.py
index 49893db698c55ff2117995addaae22ae7e9b802a..4383d78331fbe3f6f69d8094bb7353c39e460e6c 100644
--- a/wetb/hawc2/pc_file.py
+++ b/wetb/hawc2/pc_file.py
@@ -7,7 +7,7 @@ from __future__ import division
 from __future__ import print_function
 from __future__ import unicode_literals
 from __future__ import absolute_import
-from builtins import open
+from io import open
 from builtins import range
 from builtins import int
 from future import standard_library
diff --git a/wetb/hawc2/sel_file.py b/wetb/hawc2/sel_file.py
index 891bc13a8805a8945f72b8bab972387048bd1154..efba5b45c6079a0ff40d3a50f7cf25282d181538 100644
--- a/wetb/hawc2/sel_file.py
+++ b/wetb/hawc2/sel_file.py
@@ -2,7 +2,7 @@ from __future__ import unicode_literals
 from __future__ import print_function
 from __future__ import division
 from __future__ import absolute_import
-from builtins import open
+from io import open
 from builtins import str
 from builtins import int
 from future import standard_library
diff --git a/wetb/hawc2/shear_file.py b/wetb/hawc2/shear_file.py
index 4cccd759f56599d6d625137294b254cf975478fa..94d5deb027a43b68e9733b8a11ac4890f3da8e00 100644
--- a/wetb/hawc2/shear_file.py
+++ b/wetb/hawc2/shear_file.py
@@ -8,7 +8,7 @@ from __future__ import print_function
 from __future__ import division
 from __future__ import absolute_import
 from builtins import range
-from builtins import open
+from io import open
 from future import standard_library
 standard_library.install_aliases()
 
diff --git a/wetb/hawc2/simulation.py b/wetb/hawc2/simulation.py
index 151f29b0a8fff5a0ae4b470d8bc2916ab1248181..1fbe49b72dbb17847ca3b0513feebb3441225cb6 100644
--- a/wetb/hawc2/simulation.py
+++ b/wetb/hawc2/simulation.py
@@ -2,7 +2,7 @@ from __future__ import print_function
 from __future__ import division
 from __future__ import unicode_literals
 from __future__ import absolute_import
-from builtins import open
+from io import open
 from builtins import str
 from future import standard_library
 standard_library.install_aliases()
diff --git a/wetb/hawc2/tests/test_htc_file.py b/wetb/hawc2/tests/test_htc_file.py
index d12ddae628259dbd5abb4c20934fd2448c127130..bed55c39204af90f62d920b44e085d1409640884 100644
--- a/wetb/hawc2/tests/test_htc_file.py
+++ b/wetb/hawc2/tests/test_htc_file.py
@@ -7,7 +7,7 @@ from __future__ import print_function
 from __future__ import unicode_literals
 from __future__ import division
 from __future__ import absolute_import
-from builtins import open
+from io import open
 from builtins import str
 from builtins import zip
 from future import standard_library
diff --git a/wetb/hawc2/tests/test_logfile.py b/wetb/hawc2/tests/test_logfile.py
index 1760c98bb336502d7c470b3783a6b2caecd65fc8..54bbca8fea5ece19a1d263fecaad1585205f0b98 100644
--- a/wetb/hawc2/tests/test_logfile.py
+++ b/wetb/hawc2/tests/test_logfile.py
@@ -7,7 +7,7 @@ from __future__ import unicode_literals
 from __future__ import print_function
 from __future__ import division
 from __future__ import absolute_import
-from builtins import open
+from io import open
 from future import standard_library
 standard_library.install_aliases()
 import unittest
diff --git a/wetb/hawc2/tests/test_shear_file.py b/wetb/hawc2/tests/test_shear_file.py
index 3418f98580441f053c6444d8d2aab346620f127e..6580a4ed79a6584b4b2eaa078b6742848fda77d0 100644
--- a/wetb/hawc2/tests/test_shear_file.py
+++ b/wetb/hawc2/tests/test_shear_file.py
@@ -7,7 +7,7 @@ from __future__ import unicode_literals
 from __future__ import print_function
 from __future__ import division
 from __future__ import absolute_import
-from builtins import open
+from io import open
 from future import standard_library
 standard_library.install_aliases()
 import unittest
diff --git a/wetb/prepost/Simulations.py b/wetb/prepost/Simulations.py
index 5594417c413749e25830ed6d1c088c860fe155d2..d0c0a984c579b8c7f1be2f39def07442c8d2d66d 100755
--- a/wetb/prepost/Simulations.py
+++ b/wetb/prepost/Simulations.py
@@ -11,7 +11,7 @@ from __future__ import division
 from __future__ import unicode_literals
 from __future__ import absolute_import
 from builtins import dict
-from builtins import open
+from io import open
 from builtins import zip
 from builtins import range
 from builtins import str
diff --git a/wetb/prepost/hawcstab2.py b/wetb/prepost/hawcstab2.py
index 5597f2c104548bb3bf1996695d74f38cefb5a71a..c90cb5bfd58a14f48568cb36983f2c05558d041c 100644
--- a/wetb/prepost/hawcstab2.py
+++ b/wetb/prepost/hawcstab2.py
@@ -9,7 +9,7 @@ from __future__ import print_function
 from __future__ import unicode_literals
 from __future__ import absolute_import
 from builtins import range
-from builtins import open
+from io import open
 from builtins import int
 from future import standard_library
 standard_library.install_aliases()
diff --git a/wetb/prepost/misc.py b/wetb/prepost/misc.py
index 965c24b7a26005dcc3ac87447fe9c2a6ecb7f9c3..c7b3a067aa917a163fd83d375b3edf9116e0f2bd 100644
--- a/wetb/prepost/misc.py
+++ b/wetb/prepost/misc.py
@@ -13,7 +13,7 @@ from __future__ import absolute_import
 from builtins import range
 from builtins import dict
 from builtins import int
-from builtins import open
+from io import open
 from builtins import str
 from future import standard_library
 standard_library.install_aliases()
diff --git a/wetb/prepost/prepost.py b/wetb/prepost/prepost.py
index 44898d13f894f046e64c86efeb97e850f9a16443..bb6a864633a2f837c53622ea8b5793f2a0395367 100644
--- a/wetb/prepost/prepost.py
+++ b/wetb/prepost/prepost.py
@@ -8,7 +8,7 @@ from __future__ import unicode_literals
 from __future__ import print_function
 from __future__ import division
 from __future__ import absolute_import
-from builtins import open
+from io import open
 from future import standard_library
 standard_library.install_aliases()
 
diff --git a/wetb/prepost/windIO.py b/wetb/prepost/windIO.py
index b166e14d2fed9850309691bbcc5697ea7d1d9614..168fbfbe9af62b550e6e7de00d76b4c44b794430 100755
--- a/wetb/prepost/windIO.py
+++ b/wetb/prepost/windIO.py
@@ -9,7 +9,7 @@ from __future__ import division
 from __future__ import unicode_literals
 from __future__ import absolute_import
 from builtins import dict
-from builtins import open
+from io import open
 from builtins import range
 from builtins import str
 from builtins import int
diff --git a/wetb/utils/cython_compile/cython_compile.py b/wetb/utils/cython_compile/cython_compile.py
index f05fe5d4570f37ec404298f4372e01f84089a8d7..af9146883099b7a27cb4e348b47eaf5c669a7a0e 100644
--- a/wetb/utils/cython_compile/cython_compile.py
+++ b/wetb/utils/cython_compile/cython_compile.py
@@ -12,7 +12,7 @@ from __future__ import unicode_literals
 from __future__ import division
 from __future__ import absolute_import
 from builtins import dict
-from builtins import open
+from io import open
 from builtins import zip
 from builtins import str
 from future import standard_library