diff --git a/docs/sphinx/phoenix_theme/theme.conf b/docs/sphinx/phoenix_theme/theme.conf
deleted file mode 100644
index 6ae2b098..00000000
--- a/docs/sphinx/phoenix_theme/theme.conf
+++ /dev/null
@@ -1,38 +0,0 @@
-[theme]
-
-inherit = basic
-stylesheet = phoenix.css
-pygments_style = sphinx
-
-[options]
-
-disqus_comments = false
-google_analytics = false
-
-rightsidebar = false
-collapsiblesidebar = true
-headerheight = 30px
-
-externalrefs = false
-
-footerbgcolor    = #11303d
-footertextcolor  = #ffffff
-sidebarbgcolor   = #1c4e63
-sidebarbtncolor  = #3c6e83
-sidebartextcolor = #ffffff
-sidebarlinkcolor = #98dbcc
-relbarbgcolor    = #133f52
-relbartextcolor  = #ffffff
-relbarlinkcolor  = #ffffff
-bgcolor          = #ffffff
-textcolor        = #000000
-headbgcolor      = #f2f2f2
-headtextcolor    = #20435c
-headlinkcolor    = #c60f0f
-linkcolor        = #355f7c
-visitedlinkcolor = #355f7c
-codebgcolor      = #eeffcc
-codetextcolor    = #333333
-
-bodyfont = sans-serif
-headfont = 'Trebuchet MS', Verdana, Arial, Helvetica, sans-serif
\ No newline at end of file
diff --git a/docs/sphinx/phoenix_theme/theme.toml b/docs/sphinx/phoenix_theme/theme.toml
new file mode 100644
index 00000000..71ee4a4a
--- /dev/null
+++ b/docs/sphinx/phoenix_theme/theme.toml
@@ -0,0 +1,35 @@
+[theme]
+inherit = "basic"
+stylesheets = [
+    "phoenix.css",
+]
+pygments_style = { default = "sphinx" }
+
+[options]
+disqus_comments = "false"
+google_analytics = "false"
+rightsidebar = "false"
+collapsiblesidebar = "true"
+headerheight = "30px"
+externalrefs = "false"
+footerbgcolor = "#11303d"
+footertextcolor = "#ffffff"
+sidebarbgcolor = "#1c4e63"
+sidebarbtncolor = "#3c6e83"
+sidebartextcolor = "#ffffff"
+sidebarlinkcolor = "#98dbcc"
+relbarbgcolor = "#133f52"
+relbartextcolor = "#ffffff"
+relbarlinkcolor = "#ffffff"
+bgcolor = "#ffffff"
+textcolor = "#000000"
+headbgcolor = "#f2f2f2"
+headtextcolor = "#20435c"
+headlinkcolor = "#c60f0f"
+linkcolor = "#355f7c"
+visitedlinkcolor = "#355f7c"
+codebgcolor = "#eeffcc"
+codetextcolor = "#333333"
+bodyfont = "sans-serif"
+headfont = "'Trebuchet MS', Verdana, Arial, Helvetica, sans-serif"
+