diff --git a/runtime/syntax/r.vim b/runtime/syntax/r.vim
index 9e25dae..a8100cf 100644
--- a/runtime/syntax/r.vim
+++ b/runtime/syntax/r.vim
@@ -5,7 +5,7 @@
 " 		      Tom Payne <tom@tompayne.org>
 " Contributor:        Johannes Ranke <jranke@uni-bremen.de>
 " Homepage:           https://github.com/jalvesaq/R-Vim-runtime
-" Last Change:	      Wed Aug 01, 2018  10:10PM
+" Last Change:	      Sun Mar 28, 2021  01:47PM
 " Filenames:	      *.R *.r *.Rhistory *.Rt
 "
 " NOTE: The highlighting of R functions might be defined in
@@ -53,12 +53,12 @@
 syn match rTodoParen contained "\(BUG\|FIXME\|NOTE\|TODO\)\s*(.\{-})\s*:" contains=rTodoKeyw,rTodoInfo transparent
 syn keyword rTodoKeyw BUG FIXME NOTE TODO contained
 syn match rTodoInfo "(\zs.\{-}\ze)" contained
-syn match rComment contains=@Spell,rCommentTodo,rTodoParen,rOBlock "#.*"
+syn match rComment contains=@Spell,rCommentTodo,rTodoParen "#.*"
 
 " Roxygen
 if g:r_syntax_hl_roxygen
   " A roxygen block can start at the beginning of a file (first version) and
-  " after a blank line (second version). It ends when a line that does not
+  " after a blank line (second version). It ends when a line appears that does not
   " contain a roxygen comment. In the following comments, any line containing
   " a roxygen comment marker (one or two hash signs # followed by a single
   " quote ' and preceded only by whitespace) is called a roxygen line. A
@@ -71,6 +71,12 @@
   syn match rOTitleBlock "\%^\(\s*#\{1,2}' .*\n\)\{1,}" contains=rOCommentKey,rOTitleTag
   syn match rOTitleBlock "^\s*\n\(\s*#\{1,2}' .*\n\)\{1,}" contains=rOCommentKey,rOTitleTag
 
+  " A title as part of a block is always at the beginning of the block, i.e.
+  " either at the start of a file or after a completely empty line.
+  syn match rOTitle "\%^\(\s*#\{1,2}' .*\n\)\{-1,}\s*#\{1,2}'\s*$" contained contains=rOCommentKey,rOTitleTag
+  syn match rOTitle "^\s*\n\(\s*#\{1,2}' .*\n\)\{-1,}\s*#\{1,2}'\s*$" contained contains=rOCommentKey,rOTitleTag
+  syn match rOTitleTag contained "@title"
+
   " When a roxygen block has a title and additional content, the title
   " consists of one or more roxygen lines (as little as possible are matched),
   " followed either by an empty roxygen line
@@ -87,16 +93,15 @@
   syn region rOBlockNoTitle start="\%^\(\s*#\{1,2}' .*\n\)\{-1,}\s*#\{1,2}'\s*\n\(\s*#\{1,2}'.*\n\)\{-}\s*#\{1,2}' @describeIn" end="^\s*\(#\{1,2}'\)\@!" contains=rOTag,rOExamples,@Spell keepend fold
   syn region rOBlockNoTitle start="^\s*\n\(\s*#\{1,2}' .*\n\)\{-1,}\s*#\{1,2}'\s*\n\(\s*#\{1,2}'.*\n\)\{-}\s*#\{1,2}' @describeIn" end="^\s*\(#\{1,2}'\)\@!" contains=rOTag,rOExamples,@Spell keepend fold
 
-  " A title as part of a block is always at the beginning of the block, i.e.
-  " either at the start of a file or after a completely empty line.
-  syn match rOTitle "\%^\(\s*#\{1,2}' .*\n\)\{-1,}\s*#\{1,2}'\s*$" contained contains=rOCommentKey,rOTitleTag
-  syn match rOTitle "^\s*\n\(\s*#\{1,2}' .*\n\)\{-1,}\s*#\{1,2}'\s*$" contained contains=rOCommentKey,rOTitleTag
-  syn match rOTitleTag contained "@title"
-
   syn match rOCommentKey "^\s*#\{1,2}'" contained
-  syn region rOExamples start="^#\{1,2}' @examples.*"rs=e+1,hs=e+1 end="^\(#\{1,2}' @.*\)\@=" end="^\(#\{1,2}'\)\@!" contained contains=rOTag fold
+  syn region rOExamples start="^\s*#\{1,2}' @examples.*"rs=e+1,hs=e+1 end="^\(#\{1,2}' @.*\)\@=" end="^\(#\{1,2}'\)\@!" contained contains=rOTag fold
 
-  " rOTag list generated from the lists in
+  " R6 classes may contain roxygen lines independent of roxygen blocks
+  syn region rOR6Class start=/R6Class(/ end=/)/ transparent contains=ALLBUT,rError,rBraceError,rCurlyError fold
+  syn match rOR6Block "#\{1,2}'.*" contains=rOTag,rOExamples,@Spell containedin=rOR6Class contained
+  syn match rOR6Block "^\s*#\{1,2}'.*" contains=rOTag,rOExamples,@Spell containedin=rOR6Class contained
+
+  " rOTag list originally generated from the lists that were available in
   " https://github.com/klutometis/roxygen/R/rd.R and
   " https://github.com/klutometis/roxygen/R/namespace.R
   " using s/^    \([A-Za-z0-9]*\) = .*/  syn match rOTag contained "@\1"/
@@ -155,7 +160,10 @@
   syn match rOTag contained "@S3method"
   syn match rOTag contained "@useDynLib"
   " other
+  syn match rOTag contained "@eval"
   syn match rOTag contained "@include"
+  syn match rOTag contained "@includeRmd"
+  syn match rOTag contained "@order"
 endif
 
 
@@ -186,6 +194,11 @@
 syn match rSpecial display contained "\\u{\x\{1,4}}"
 syn match rSpecial display contained "\\U{\x\{1,8}}"
 
+" Raw string
+syn region rRawString matchgroup=rRawStrDelim start=/[rR]\z(['"]\)\z(-*\)(/ end=/)\z2\z1/ keepend
+syn region rRawString matchgroup=rRawStrDelim start=/[rR]\z(['"]\)\z(-*\){/ end=/}\z2\z1/ keepend
+syn region rRawString matchgroup=rRawStrDelim start=/[rR]\z(['"]\)\z(-*\)\[/ end=/\]\z2\z1/ keepend
+
 " Statement
 syn keyword rStatement   break next return
 syn keyword rConditional if else
@@ -354,6 +367,8 @@
 hi def link rOpError     Error
 hi def link rParenError  Error
 hi def link rPreProc     PreProc
+hi def link rRawString   String
+hi def link rRawStrDelim Delimiter
 hi def link rRepeat      Repeat
 hi def link rSpecial     SpecialChar
 hi def link rStatement   Statement
@@ -366,6 +381,7 @@
   hi def link rOTitleBlock Title
   hi def link rOBlock         Comment
   hi def link rOBlockNoTitle  Comment
+  hi def link rOR6Block         Comment
   hi def link rOTitle      Title
   hi def link rOCommentKey Comment
   hi def link rOExamples   SpecialComment