diff --git a/themes/blackburn/theme.lua b/themes/blackburn/theme.lua
index 16f5a70..cfc209d 100644
--- a/themes/blackburn/theme.lua
+++ b/themes/blackburn/theme.lua
@@ -5,11 +5,13 @@
 
 --]]
 
-local gears   = require("gears")
-local lain    = require("lain")
-local awful   = require("awful")
-local wibox   = require("wibox")
-local os      = { getenv = os.getenv }
+local gears = require("gears")
+local lain  = require("lain")
+local awful = require("awful")
+local wibox = require("wibox")
+
+local os = { getenv = os.getenv }
+local my_table = awful.util.table or gears.table -- 4.{0,1} compatibility
 
 local theme                                     = {}
 theme.dir                                       = os.getenv("HOME") .. "/.config/awesome/themes/blackburn"
@@ -222,7 +224,7 @@ function theme.at_screen_connect(s)
     -- Create an imagebox widget which will contains an icon indicating which layout we're using.
     -- We need one layoutbox per screen.
     s.mylayoutbox = awful.widget.layoutbox(s)
-    s.mylayoutbox:buttons(gears.table.join(
+    s.mylayoutbox:buttons(my_table.join(
                            awful.button({ }, 1, function () awful.layout.inc( 1) end),
                            awful.button({ }, 3, function () awful.layout.inc(-1) end),
                            awful.button({ }, 4, function () awful.layout.inc( 1) end),
diff --git a/themes/copland/theme.lua b/themes/copland/theme.lua
index 7484a01..703460d 100644
--- a/themes/copland/theme.lua
+++ b/themes/copland/theme.lua
@@ -5,12 +5,14 @@
 
 --]]
 
-local gears   = require("gears")
-local lain    = require("lain")
-local awful   = require("awful")
-local wibox   = require("wibox")
-local os      = { getenv = os.getenv, setlocale = os.setlocale }
+local gears = require("gears")
+local lain  = require("lain")
+local awful = require("awful")
+local wibox = require("wibox")
+
+local os = { getenv = os.getenv, setlocale = os.setlocale }
 local awesome, client = awesome, client
+local my_table = awful.util.table or gears.table -- 4.{0,1} compatibility
 
 local theme                                     = {}
 theme.dir                                       = os.getenv("HOME") .. "/.config/awesome/themes/copland"
@@ -252,7 +254,7 @@ theme.volume = lain.widget.alsabar({
     }
 })
 theme.volume.tooltip.wibox.fg = theme.fg_focus
-theme.volume.bar:buttons(gears.table.join (
+theme.volume.bar:buttons(my_table.join (
           awful.button({}, 1, function()
             awful.spawn.with_shell(string.format("%s -e alsamixer", awful.util.terminal))
           end),
@@ -316,7 +318,7 @@ function theme.at_screen_connect(s)
     -- Create an imagebox widget which will contains an icon indicating which layout we're using.
     -- We need one layoutbox per screen.
     s.mylayoutbox = awful.widget.layoutbox(s)
-    s.mylayoutbox:buttons(gears.table.join(
+    s.mylayoutbox:buttons(my_table.join(
                            awful.button({ }, 1, function () awful.layout.inc( 1) end),
                            awful.button({ }, 3, function () awful.layout.inc(-1) end),
                            awful.button({ }, 4, function () awful.layout.inc( 1) end),
diff --git a/themes/dremora/theme.lua b/themes/dremora/theme.lua
index c1eff2a..4f30a97 100644
--- a/themes/dremora/theme.lua
+++ b/themes/dremora/theme.lua
@@ -5,11 +5,13 @@
 
 --]]
 
-local gears   = require("gears")
-local lain    = require("lain")
-local awful   = require("awful")
-local wibox   = require("wibox")
-local os      = { getenv = os.getenv }
+local gears = require("gears")
+local lain  = require("lain")
+local awful = require("awful")
+local wibox = require("wibox")
+
+local os = { getenv = os.getenv }
+local my_table = awful.util.table or gears.table -- 4.{0,1} compatibility
 
 local theme                                     = {}
 theme.dir                                       = os.getenv("HOME") .. "/.config/awesome/themes/dremora"
@@ -204,7 +206,7 @@ function theme.at_screen_connect(s)
     -- Create an imagebox widget which will contains an icon indicating which layout we're using.
     -- We need one layoutbox per screen.
     s.mylayoutbox = awful.widget.layoutbox(s)
-    s.mylayoutbox:buttons(gears.table.join(
+    s.mylayoutbox:buttons(my_table.join(
                            awful.button({ }, 1, function () awful.layout.inc( 1) end),
                            awful.button({ }, 3, function () awful.layout.inc(-1) end),
                            awful.button({ }, 4, function () awful.layout.inc( 1) end),
diff --git a/themes/holo/theme.lua b/themes/holo/theme.lua
index b33b0da..2d28dc0 100644
--- a/themes/holo/theme.lua
+++ b/themes/holo/theme.lua
@@ -5,12 +5,14 @@
 
 --]]
 
-local gears  = require("gears")
-local lain   = require("lain")
-local awful  = require("awful")
-local wibox  = require("wibox")
+local gears = require("gears")
+local lain  = require("lain")
+local awful = require("awful")
+local wibox = require("wibox")
+
 local string = string
-local os     = { getenv = os.getenv }
+local os = { getenv = os.getenv }
+local my_table = awful.util.table or gears.table -- 4.{0,1} compatibility
 
 local theme                                     = {}
 theme.default_dir                               = require("awful.util").get_themes_dir() .. "default"
@@ -174,25 +176,25 @@ theme.mpd = lain.widget.mpd({
 local musicbg = wibox.container.background(theme.mpd.widget, theme.bg_focus, gears.shape.rectangle)
 local musicwidget = wibox.container.margin(musicbg, 0, 0, 5, 5)
 
-musicwidget:buttons(gears.table.join(awful.button({ }, 1,
+musicwidget:buttons(my_table.join(awful.button({ }, 1,
 function () awful.spawn(theme.musicplr) end)))
-prev_icon:buttons(gears.table.join(awful.button({}, 1,
+prev_icon:buttons(my_table.join(awful.button({}, 1,
 function ()
     awful.spawn.with_shell("mpc prev")
     theme.mpd.update()
 end)))
-next_icon:buttons(gears.table.join(awful.button({}, 1,
+next_icon:buttons(my_table.join(awful.button({}, 1,
 function ()
     awful.spawn.with_shell("mpc next")
     theme.mpd.update()
 end)))
-stop_icon:buttons(gears.table.join(awful.button({}, 1,
+stop_icon:buttons(my_table.join(awful.button({}, 1,
 function ()
     play_pause_icon:set_image(theme.play)
     awful.spawn.with_shell("mpc stop")
     theme.mpd.update()
 end)))
-play_pause_icon:buttons(gears.table.join(awful.button({}, 1,
+play_pause_icon:buttons(my_table.join(awful.button({}, 1,
 function ()
     awful.spawn.with_shell("mpc toggle")
     theme.mpd.update()
@@ -303,7 +305,7 @@ function theme.at_screen_connect(s)
     -- Create an imagebox widget which will contains an icon indicating which layout we're using.
     -- We need one layoutbox per screen.
     s.mylayoutbox = awful.widget.layoutbox(s)
-    s.mylayoutbox:buttons(gears.table.join(
+    s.mylayoutbox:buttons(my_table.join(
                            awful.button({ }, 1, function () awful.layout.inc( 1) end),
                            awful.button({ }, 3, function () awful.layout.inc(-1) end),
                            awful.button({ }, 4, function () awful.layout.inc( 1) end),
diff --git a/themes/multicolor/theme.lua b/themes/multicolor/theme.lua
index 426b254..d67b985 100644
--- a/themes/multicolor/theme.lua
+++ b/themes/multicolor/theme.lua
@@ -5,12 +5,13 @@
 
 --]]
 
-
 local gears = require("gears")
 local lain  = require("lain")
 local awful = require("awful")
 local wibox = require("wibox")
-local os    = { getenv = os.getenv, setlocale = os.setlocale }
+
+local os = { getenv = os.getenv, setlocale = os.setlocale }
+local my_table = awful.util.table or gears.table -- 4.{0,1} compatibility
 
 local theme                                     = {}
 theme.confdir                                   = os.getenv("HOME") .. "/.config/awesome/themes/multicolor"
@@ -268,7 +269,7 @@ function theme.at_screen_connect(s)
     -- Create an imagebox widget which will contains an icon indicating which layout we're using.
     -- We need one layoutbox per screen.
     s.mylayoutbox = awful.widget.layoutbox(s)
-    s.mylayoutbox:buttons(gears.table.join(
+    s.mylayoutbox:buttons(my_table.join(
                            awful.button({ }, 1, function () awful.layout.inc( 1) end),
                            awful.button({ }, 3, function () awful.layout.inc(-1) end),
                            awful.button({ }, 4, function () awful.layout.inc( 1) end),
diff --git a/themes/powerarrow-dark/theme.lua b/themes/powerarrow-dark/theme.lua
index 797d364..2e6dec9 100644
--- a/themes/powerarrow-dark/theme.lua
+++ b/themes/powerarrow-dark/theme.lua
@@ -9,7 +9,9 @@ local gears = require("gears")
 local lain  = require("lain")
 local awful = require("awful")
 local wibox = require("wibox")
-local os    = { getenv = os.getenv }
+
+local os = { getenv = os.getenv }
+local my_table = awful.util.table or gears.table -- 4.{0,1} compatibility
 
 local theme                                     = {}
 theme.dir                                       = os.getenv("HOME") .. "/.config/awesome/themes/powerarrow-dark"
@@ -110,7 +112,7 @@ theme.cal = lain.widget.calendar({
 -- Mail IMAP check
 local mailicon = wibox.widget.imagebox(theme.widget_mail)
 --[[ commented because it needs to be set before use
-mailicon:buttons(gears.table.join(awful.button({ }, 1, function () awful.spawn(mail) end)))
+mailicon:buttons(my_table.join(awful.button({ }, 1, function () awful.spawn(mail) end)))
 local mail = lain.widget.imap({
     timeout  = 180,
     server   = "server",
@@ -131,7 +133,7 @@ local mail = lain.widget.imap({
 -- MPD
 local musicplr = awful.util.terminal .. " -title Music -g 130x34-320+16 -e ncmpcpp"
 local mpdicon = wibox.widget.imagebox(theme.widget_music)
-mpdicon:buttons(gears.table.join(
+mpdicon:buttons(my_table.join(
     awful.button({ modkey }, 1, function () awful.spawn.with_shell(musicplr) end),
     awful.button({ }, 1, function ()
         awful.spawn.with_shell("mpc prev")
@@ -275,7 +277,7 @@ function theme.at_screen_connect(s)
     -- Create an imagebox widget which will contains an icon indicating which layout we're using.
     -- We need one layoutbox per screen.
     s.mylayoutbox = awful.widget.layoutbox(s)
-    s.mylayoutbox:buttons(gears.table.join(
+    s.mylayoutbox:buttons(my_table.join(
                            awful.button({ }, 1, function () awful.layout.inc( 1) end),
                            awful.button({ }, 3, function () awful.layout.inc(-1) end),
                            awful.button({ }, 4, function () awful.layout.inc( 1) end),
diff --git a/themes/powerarrow/theme.lua b/themes/powerarrow/theme.lua
index 87a23e9..547e56f 100644
--- a/themes/powerarrow/theme.lua
+++ b/themes/powerarrow/theme.lua
@@ -9,7 +9,9 @@ local gears = require("gears")
 local lain  = require("lain")
 local awful = require("awful")
 local wibox = require("wibox")
+
 local os, math, string = os, math, string
+local my_table = awful.util.table or gears.table -- 4.{0,1} compatibility
 
 local theme                                     = {}
 theme.dir                                       = os.getenv("HOME") .. "/.config/awesome/themes/powerarrow"
@@ -122,16 +124,16 @@ lain.widget.contrib.task.attach(task, {
     -- do not colorize output
     show_cmd = "task | sed -r 's/\\x1B\\[([0-9]{1,2}(;[0-9]{1,2})?)?[mGK]//g'"
 })
-task:buttons(gears.table.join(awful.button({}, 1, lain.widget.contrib.task.prompt)))
+task:buttons(my_table.join(awful.button({}, 1, lain.widget.contrib.task.prompt)))
 
 -- Scissors (xsel copy and paste)
 local scissors = wibox.widget.imagebox(theme.widget_scissors)
-scissors:buttons(gears.table.join(awful.button({}, 1, function() awful.spawn("xsel | xsel -i -b") end)))
+scissors:buttons(my_table.join(awful.button({}, 1, function() awful.spawn("xsel | xsel -i -b") end)))
 
 -- Mail IMAP check
 local mailicon = wibox.widget.imagebox(theme.widget_mail)
 --[[ commented because it needs to be set before use
-mailicon:buttons(gears.table.join(awful.button({ }, 1, function () awful.spawn(mail) end)))
+mailicon:buttons(my_table.join(awful.button({ }, 1, function () awful.spawn(mail) end)))
 local mail = lain.widget.imap({
     timeout  = 180,
     server   = "server",
@@ -158,7 +160,7 @@ theme.volume = lain.widget.alsabar({
 -- MPD
 local musicplr = awful.util.terminal .. " -title Music -g 130x34-320+16 -e ncmpcpp"
 local mpdicon = wibox.widget.imagebox(theme.widget_music)
-mpdicon:buttons(gears.table.join(
+mpdicon:buttons(my_table.join(
     awful.button({ modkey }, 1, function () awful.spawn.with_shell(musicplr) end),
     awful.button({ }, 1, function ()
         awful.spawn.with_shell("mpc prev")
@@ -311,7 +313,7 @@ function theme.at_screen_connect(s)
     -- Create an imagebox widget which will contains an icon indicating which layout we're using.
     -- We need one layoutbox per screen.
     s.mylayoutbox = awful.widget.layoutbox(s)
-    s.mylayoutbox:buttons(gears.table.join(
+    s.mylayoutbox:buttons(my_table.join(
                            awful.button({ }, 1, function () awful.layout.inc( 1) end),
                            awful.button({ }, 3, function () awful.layout.inc(-1) end),
                            awful.button({ }, 4, function () awful.layout.inc( 1) end),
diff --git a/themes/rainbow/theme.lua b/themes/rainbow/theme.lua
index fbd64f7..5b34a68 100644
--- a/themes/rainbow/theme.lua
+++ b/themes/rainbow/theme.lua
@@ -9,7 +9,9 @@ local gears = require("gears")
 local lain  = require("lain")
 local awful = require("awful")
 local wibox = require("wibox")
-local os    = { getenv = os.getenv }
+
+local os = { getenv = os.getenv }
+local my_table = awful.util.table or gears.table -- 4.{0,1} compatibility
 
 local theme                                     = {}
 theme.default_dir                               = require("awful.util").get_themes_dir() .. "default"
@@ -167,7 +169,7 @@ theme.volume = lain.widget.alsabar({
 })
 theme.volume.tooltip.wibox.fg = theme.fg_focus
 theme.volume.tooltip.wibox.font = theme.font
-theme.volume.bar:buttons(gears.table.join (
+theme.volume.bar:buttons(my_table.join (
           awful.button({}, 1, function()
             awful.spawn.with_shell(string.format("%s -e alsamixer", terminal))
           end),
@@ -228,7 +230,7 @@ function theme.at_screen_connect(s)
     s.mytxtlayoutbox = wibox.widget.textbox(theme["layout_txt_" .. awful.layout.getname(awful.layout.get(s))])
     awful.tag.attached_connect_signal(s, "property::selected", function () update_txt_layoutbox(s) end)
     awful.tag.attached_connect_signal(s, "property::layout", function () update_txt_layoutbox(s) end)
-    s.mytxtlayoutbox:buttons(gears.table.join(
+    s.mytxtlayoutbox:buttons(my_table.join(
                            awful.button({}, 1, function() awful.layout.inc(1) end),
                            awful.button({}, 3, function() awful.layout.inc(-1) end),
                            awful.button({}, 4, function() awful.layout.inc(1) end),
diff --git a/themes/steamburn/theme.lua b/themes/steamburn/theme.lua
index b08bf0f..0056979 100644
--- a/themes/steamburn/theme.lua
+++ b/themes/steamburn/theme.lua
@@ -9,7 +9,9 @@ local gears = require("gears")
 local lain  = require("lain")
 local awful = require("awful")
 local wibox = require("wibox")
-local os    = { getenv = os.getenv }
+
+local os = { getenv = os.getenv }
+local my_table = awful.util.table or gears.table -- 4.{0,1} compatibility
 
 local theme                                     = {}
 theme.zenburn_dir                               = require("awful.util").get_themes_dir() .. "zenburn"
@@ -222,7 +224,7 @@ function theme.at_screen_connect(s)
     s.mytxtlayoutbox = wibox.widget.textbox(theme["layout_txt_" .. awful.layout.getname(awful.layout.get(s))])
     awful.tag.attached_connect_signal(s, "property::selected", function () update_txt_layoutbox(s) end)
     awful.tag.attached_connect_signal(s, "property::layout", function () update_txt_layoutbox(s) end)
-    s.mytxtlayoutbox:buttons(gears.table.join(
+    s.mytxtlayoutbox:buttons(my_table.join(
                            awful.button({}, 1, function() awful.layout.inc(1) end),
                            awful.button({}, 3, function() awful.layout.inc(-1) end),
                            awful.button({}, 4, function() awful.layout.inc(1) end),
diff --git a/themes/vertex/theme.lua b/themes/vertex/theme.lua
index ac2eac8..b90738b 100644
--- a/themes/vertex/theme.lua
+++ b/themes/vertex/theme.lua
@@ -1,7 +1,7 @@
 --[[
 
- Vertex Awesome WM theme
- github.com/lcpz
+     Vertex Awesome WM theme
+     github.com/lcpz
 
 --]]
 
@@ -11,6 +11,7 @@ local awful = require("awful")
 local wibox = require("wibox")
 
 local math, string, tag, tonumber, type, os = math, string, tag, tonumber, type, os
+local my_table = awful.util.table or gears.table -- 4.{0,1} compatibility
 
 local theme                                     = {}
 theme.default_dir                               = require("awful.util").get_themes_dir() .. "default"
@@ -205,7 +206,7 @@ theme.volume = lain.widget.alsabar({
         volicon:set_image(theme[index])
     end
 })
-volicon:buttons(gears.table.join (
+volicon:buttons(my_table.join (
           awful.button({}, 1, function()
             awful.spawn.with_shell(string.format("%s -e alsamixer", awful.util.terminal))
           end),
@@ -404,7 +405,7 @@ function theme.at_screen_connect(s)
     -- Create an imagebox widget which will contains an icon indicating which layout we're using.
     -- We need one layoutbox per screen.
     s.mylayoutbox = awful.widget.layoutbox(s)
-    s.mylayoutbox:buttons(gears.table.join(
+    s.mylayoutbox:buttons(my_table.join(
                            awful.button({ }, 1, function () awful.layout.inc( 1) end),
                            awful.button({ }, 3, function () awful.layout.inc(-1) end),
                            awful.button({ }, 4, function () awful.layout.inc( 1) end),