diff --git a/README.md b/README.md
index ed86c74..4bc0eca 100644
--- a/README.md
+++ b/README.md
@@ -86,7 +86,7 @@ If you need full functionality of any plugin, please use it directly with your p
 - [pgsql](https://github.com/exu/pgsql.vim) (syntax, ftdetect)
 - [php](https://github.com/StanAngeloff/php.vim) (syntax)
 - [plantuml](https://github.com/aklt/plantuml-syntax) (syntax, indent, ftplugin, ftdetect)
-- [powershell](https://github.com/Persistent13/vim-ps1) (syntax, indent, ftplugin, ftdetect)
+- [powershell](https://github.com/PProvost/vim-ps1) (syntax, indent, ftplugin, ftdetect)
 - [protobuf](https://github.com/uarun/vim-protobuf) (syntax, indent, ftdetect)
 - [pug](https://github.com/digitaltoad/vim-pug) (syntax, indent, ftplugin, ftdetect)
 - [puppet](https://github.com/voxpupuli/vim-puppet) (syntax, indent, ftplugin, ftdetect)
diff --git a/build b/build
index da7962d..cf083e7 100755
--- a/build
+++ b/build
@@ -159,7 +159,7 @@ PACKS="
   pgsql:exu/pgsql.vim
   php:StanAngeloff/php.vim
   plantuml:aklt/plantuml-syntax
-  powershell:Persistent13/vim-ps1
+  powershell:PProvost/vim-ps1
   protobuf:uarun/vim-protobuf
   pug:digitaltoad/vim-pug
   puppet:voxpupuli/vim-puppet
diff --git a/ftdetect/polyglot.vim b/ftdetect/polyglot.vim
index 386086d..721fd06 100644
--- a/ftdetect/polyglot.vim
+++ b/ftdetect/polyglot.vim
@@ -658,6 +658,7 @@ if !exists('g:polyglot_disabled') || index(g:polyglot_disabled, 'powershell') ==
 au BufNewFile,BufRead   *.ps1   set ft=ps1
 au BufNewFile,BufRead   *.psd1  set ft=ps1
 au BufNewFile,BufRead   *.psm1  set ft=ps1
+au BufNewFile,BufRead   *.pssc  set ft=ps1
 
 endif
 
@@ -673,7 +674,6 @@ if !exists('g:polyglot_disabled') || index(g:polyglot_disabled, 'powershell') ==
 
 au BufNewFile,BufRead   *.ps1xml   set ft=ps1xml
 
-
 endif
 
 " ftdetect/pug.vim
@@ -1018,4 +1018,19 @@ au BufNewFile,BufRead *.vue setf vue.html.javascript.css
 
 endif
 
+" ftdetect/xml.vim
+if !exists('g:polyglot_disabled') || index(g:polyglot_disabled, 'powershell') == -1
+  
+" Vim ftdetect plugin file
+" Language:           Windows PowerShell
+" Maintainer:         Peter Provost <peter@provost.org>
+" Version:            2.10
+" Project Repository: https://github.com/PProvost/vim-ps1
+" Vim Script Page:    http://www.vim.org/scripts/script.php?script_id=1327
+
+au BufNewFile,BufRead   *.cdxml    set ft=xml
+au BufNewFile,BufRead   *.psc1     set ft=xml
+
+endif
+
 augroup END
diff --git a/syntax/ps1.vim b/syntax/ps1.vim
index e935d58..f69c0ce 100644
--- a/syntax/ps1.vim
+++ b/syntax/ps1.vim
@@ -10,6 +10,7 @@ if !exists('g:polyglot_disabled') || index(g:polyglot_disabled, 'powershell') ==
 " The following settings are available for tuning syntax highlighting:
 "    let ps1_nofold_blocks = 1
 "    let ps1_nofold_sig = 1
+"    let ps1_nofold_region = 1
 
 " Compatible VIM syntax file start
 if version < 600
@@ -18,6 +19,9 @@ elseif exists("b:current_syntax")
 	finish
 endif
 
+" Operators contain dashes
+setlocal iskeyword+=-
+
 " PowerShell doesn't care about case
 syn case ignore
 
@@ -25,7 +29,7 @@ syn case ignore
 syn sync minlines=100
 
 " Certain tokens can't appear at the top level of the document
-syn cluster ps1NotTop contains=@ps1Comment,ps1CDocParam,ps1Function
+syn cluster ps1NotTop contains=@ps1Comment,ps1CDocParam,ps1FunctionDeclaration
 
 " Comments and special comment words
 syn keyword ps1CommentTodo TODO FIXME XXX TBD HACK NOTE contained
@@ -42,10 +46,9 @@ syn match ps1Repeat /\<foreach\>/ nextgroup=ps1Block skipwhite
 syn match ps1Keyword /\<while\>/ nextgroup=ps1Block skipwhite
 syn match ps1Keyword /\<where\>/ nextgroup=ps1Block skipwhite
 
-syn keyword ps1Exception begin process end exit
+syn keyword ps1Exception begin process end exit inlinescript parallel sequence
 syn keyword ps1Keyword try catch finally throw
 syn keyword ps1Keyword return filter in trap param data dynamicparam 
-syn match ps1Keyword /&/
 syn keyword ps1Constant $true $false $null
 syn match ps1Constant +\$?+
 syn match ps1Constant +\$_+
@@ -55,50 +58,70 @@ syn match ps1Constant +\$^+
 " Keywords reserved for future use
 syn keyword ps1Keyword class define from using var
 
-" Functions and Cmdlets
-syn match ps1Cmdlet /\w\+-\w\+/
-syn keyword ps1Keyword function nextgroup=ps1Function skipwhite
-syn keyword ps1Keyword filter nextgroup=ps1Function skipwhite
-syn match ps1Function /\w\+-*\w*/ contained
+" Function declarations
+syn keyword ps1Keyword function nextgroup=ps1FunctionDeclaration skipwhite
+syn keyword ps1Keyword filter nextgroup=ps1FunctionDeclaration skipwhite
+syn keyword ps1Keyword workflow nextgroup=ps1FunctionDeclaration skipwhite
+syn keyword ps1Keyword configuration nextgroup=ps1FunctionDeclaration skipwhite
+syn keyword ps1Keyword class nextgroup=ps1FunctionDeclaration skipwhite
+syn keyword ps1Keyword enum nextgroup=ps1FunctionDeclaration skipwhite
+syn match ps1FunctionDeclaration /\w\+\(-\w\+\)*/ contained
+
+" Function invocations
+syn match ps1FunctionInvocation /\w\+\(-\w\+\)\+/
 
 " Type declarations
-syn match ps1Type /\[[a-z0-9_:.]\+\(\[\]\)\?\]/
-syn match ps1StandaloneType /[a-z0-9_.]\+/ contained
-syn keyword ps1Scope global local private script contained
+syn match ps1Type /\[[a-z_][a-z0-9_.,\[\]]\+\]/
 
-" Variables and other user defined items
-syn match ps1Variable /\$\w\+/
-syn match ps1Variable /\${\w\+:\\\w\+}/
-syn match ps1ScopedVariable /\$\w\+:\w\+/ contains=ps1Scope
-syn match ps1VariableName /\w\+/ contained
+" Variable references
+syn match ps1ScopeModifier /\(global:\|local:\|private:\|script:\)/ contained
+syn match ps1Variable /\$\w\+\(:\w\+\)\?/ contains=ps1ScopeModifier
+syn match ps1Variable /\${\w\+\(:\w\+\)\?}/ contains=ps1ScopeModifier
 
-" Operators all start w/ dash
-syn match ps1OperatorStart /-c\?/ nextgroup=ps1Operator
-syn keyword ps1Operator eq ne ge gt lt le like notlike match notmatch replace split /contains/ notcontains contained
-syn keyword ps1Operator ieq ine ige igt ile ilt ilike inotlike imatch inotmatch ireplace isplit icontains inotcontains contained
-syn keyword ps1Operator ceq cne cge cgt clt cle clike cnotlike cmatch cnotmatch creplace csplit ccontains cnotcontains contained
-syn keyword ps1Operator is isnot as join contained
-syn keyword ps1Operator and or not xor band bor bnot bxor contained
-syn keyword ps1Operator f contained
+" Operators
+syn keyword ps1Operator -eq -ne -ge -gt -lt -le -like -notlike -match -notmatch -replace -split -contains -notcontains
+syn keyword ps1Operator -ieq -ine -ige -igt -ile -ilt -ilike -inotlike -imatch -inotmatch -ireplace -isplit -icontains -inotcontains
+syn keyword ps1Operator -ceq -cne -cge -cgt -clt -cle -clike -cnotlike -cmatch -cnotmatch -creplace -csplit -ccontains -cnotcontains
+syn keyword ps1Operator -in -notin
+syn keyword ps1Operator -is -isnot -as -join
+syn keyword ps1Operator -and -or -not -xor -band -bor -bnot -bxor
+syn keyword ps1Operator -f
+syn match ps1Operator /!/
+syn match ps1Operator /=/
+syn match ps1Operator /+=/
+syn match ps1Operator /-=/
+syn match ps1Operator /\*=/
+syn match ps1Operator /\/=/
+syn match ps1Operator /%=/
+syn match ps1Operator /+/
+syn match ps1Operator /-\(\s\|\d\|\.\|\$\|(\)\@=/
+syn match ps1Operator /\*/
+syn match ps1Operator /\//
+syn match ps1Operator /|/
+syn match ps1Operator /%/
+syn match ps1Operator /&/
+syn match ps1Operator /::/
+syn match ps1Operator /,/
+syn match ps1Operator /\(^\|\s\)\@<=\. \@=/
 
 " Regular Strings
 " These aren't precisely correct and could use some work
-syn region ps1String start=/"/ skip=/`"/ end=/"/ contains=@ps1StringSpecial 
+syn region ps1String start=/"/ skip=/`"/ end=/"/ contains=@ps1StringSpecial,@Spell
 syn region ps1String start=/'/ skip=/''/ end=/'/
 
 " Here-Strings
-syn region ps1String start=/@"$/ end=/^"@/ contains=@ps1StringSpecial
+syn region ps1String start=/@"$/ end=/^"@/ contains=@ps1StringSpecial,@Spell
 syn region ps1String start=/@'$/ end=/^'@/
 
 " Interpolation
-syn match ps1Escape /`./ contained
+syn match ps1Escape /`./
 syn region ps1Interpolation matchgroup=ps1InterpolationDelimiter start="$(" end=")" contained contains=ALLBUT,@ps1NotTop
 syn region ps1NestedParentheses start="(" skip="\\\\\|\\)" matchgroup=ps1Interpolation end=")" transparent contained
-syn cluster ps1StringSpecial contains=ps1Escape,ps1Interpolation,ps1Variable,ps1Boolean,ps1Constant,ps1BuiltIn
+syn cluster ps1StringSpecial contains=ps1Escape,ps1Interpolation,ps1Variable,ps1Boolean,ps1Constant,ps1BuiltIn,@Spell
 
 " Numbers
-syn match   ps1Number		"\<\(0[xX]\x\+\|\d\+\)\([KMGTP][B]\)\=\>"
-syn match   ps1Number		"\(\<\d\+\.\d*\|\.\d\+\)\([eE][-+]\=\d\+\)\=[dD]\="
+syn match   ps1Number		"\(\<\|-\)\@<=\(0[xX]\x\+\|\d\+\)\([KMGTP][B]\)\=\(\>\|-\)\@="
+syn match   ps1Number		"\(\(\<\|-\)\@<=\d\+\.\d*\|\.\d\+\)\([eE][-+]\=\d\+\)\=[dD]\="
 syn match   ps1Number		"\<\d\+[eE][-+]\=\d\+[dD]\=\>"
 syn match   ps1Number		"\<\d\+\([eE][-+]\=\d\+\)\=[dD]\>"
 
@@ -115,6 +138,10 @@ if !exists('g:ps1_nofold_blocks')
 	syn region ps1Block start=/{/ end=/}/ transparent fold
 endif
 
+if !exists('g:ps1_nofold_region')
+	syn region ps1Region start=/#region/ end=/#endregion/ transparent fold keepend extend
+endif
+
 if !exists('g:ps1_nofold_sig')
 	syn region ps1Signature start=/# SIG # Begin signature block/ end=/# SIG # End signature block/ transparent fold
 endif
@@ -130,23 +157,21 @@ if version >= 508 || !exists("did_ps1_syn_inits")
 
 	HiLink ps1Number Number
 	HiLink ps1Block Block
+	HiLink ps1Region Region
 	HiLink ps1Exception Exception
 	HiLink ps1Constant Constant
 	HiLink ps1String String
 	HiLink ps1Escape SpecialChar
 	HiLink ps1InterpolationDelimiter Delimiter
 	HiLink ps1Conditional Conditional
-	HiLink ps1Function Function
+	HiLink ps1FunctionDeclaration Function
+	HiLink ps1FunctionInvocation Function
 	HiLink ps1Variable Identifier
-	HiLink ps1ScopedVariable Identifier
-	HiLink ps1VariableName Identifier
 	HiLink ps1Boolean Boolean
 	HiLink ps1Constant Constant
 	HiLink ps1BuiltIn StorageClass
 	HiLink ps1Type Type
-	HiLink ps1Scope Type
-	HiLink ps1StandaloneType Type
-	HiLink ps1Number Number
+	HiLink ps1ScopeModifier StorageClass
 	HiLink ps1Comment Comment
 	HiLink ps1CommentTodo Todo
 	HiLink ps1CommentDoc Tag
@@ -156,11 +181,9 @@ if version >= 508 || !exists("did_ps1_syn_inits")
 	HiLink ps1RepeatAndCmdlet Repeat
 	HiLink ps1Keyword Keyword
 	HiLink ps1KeywordAndCmdlet Keyword
-	HiLink ps1Cmdlet Statement
 	delcommand HiLink
 endif
 
 let b:current_syntax = "ps1"
 
-
 endif