diff --git a/var/spack/repos/builtin/packages/r-bookdown/package.py b/var/spack/repos/builtin/packages/r-bookdown/package.py
index ae6df416dc..896039cdad 100644
--- a/var/spack/repos/builtin/packages/r-bookdown/package.py
+++ b/var/spack/repos/builtin/packages/r-bookdown/package.py
@@ -7,20 +7,26 @@
 
 
 class RBookdown(RPackage):
-    """Output formats and utilities for authoring books and technical
+    """Authoring Books and Technical Documents with R Markdown
+
+    Output formats and utilities for authoring books and technical
     documents with R Markdown."""
 
     homepage = "https://cloud.r-project.org/package=bookdown"
     url      = "https://cloud.r-project.org/src/contrib/bookdown_0.5.tar.gz"
     list_url = "https://cloud.r-project.org/src/contrib/Archive/bookdown"
 
+    version('0.21', sha256='47c0fa7a65da83753c2f445e0e972913f9203460f1daae3ab255d0d4b30eba76')
     version('0.12', sha256='38eb4c5b877ccd85b16cfe74a48c3bc53de2f276da98e5515f37e7a06e065bb0')
     version('0.5', sha256='b7331fd56f64bd2bddc34e2a188fc491f9ff5308f44f7e3151721247f21ca67e')
 
-    depends_on('r-yaml@2.1.14:', when='@:0.10', type=('build', 'run'))
-    depends_on('r-rmarkdown@1.12:', type=('build', 'run'))
-    depends_on('r-knitr@1.22:', type=('build', 'run'))
-    depends_on('r-htmltools@0.3.6:', type=('build', 'run'))
-    depends_on('r-xfun@0.6:', when='@0.12:', type=('build', 'run'))
-    depends_on('r-tinytex@0.12:', when='@0.12:', type=('build', 'run'))
     depends_on('pandoc@1.17.2:')
+    depends_on('r-htmltools@0.3.6:', type=('build', 'run'))
+    depends_on('r-knitr@1.22:', type=('build', 'run'))
+    depends_on('r-rmarkdown@1.12:', when='@:0.12', type=('build', 'run'))
+    depends_on('r-rmarkdown@2.4:', when='@0.21:', type=('build', 'run'))
+    depends_on('r-xfun@0.6:', when='@:0.12', type=('build', 'run'))
+    depends_on('r-xfun@0.13:', when='@0.21:', type=('build', 'run'))
+    depends_on('r-tinytex@0.12:', when='@0.12:', type=('build', 'run'))
+    depends_on('r-yaml@2.1.14:', when='@:0.12', type=('build', 'run'))
+    depends_on('r-yaml@2.1.19:', when='@0.21:', type=('build', 'run'))