diff --git a/.gitignore b/.gitignore
index ae86662..73d5e1f 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,3 +2,4 @@
 /htmlwidgets_1.2.tar.gz
 /htmlwidgets_1.3.tar.gz
 /htmlwidgets_1.5.1.tar.gz
+/htmlwidgets_1.5.3.tar.gz
diff --git a/R-htmlwidgets.spec b/R-htmlwidgets.spec
index 38cd550..fc9790c 100644
--- a/R-htmlwidgets.spec
+++ b/R-htmlwidgets.spec
@@ -1,3 +1,5 @@
+%bcond_without bootstrap
+
 %global packname  htmlwidgets
 %global rlibdir  %{_datadir}/R/library
 
@@ -5,8 +7,8 @@
 %global with_doc 0
 
 Name:             R-%{packname}
-Version:          1.5.1
-Release:          5%{?dist}
+Version:          1.5.3
+Release:          1%{?dist}
 Summary:          HTML Widgets for R
 
 License:          MIT
@@ -16,7 +18,7 @@ Source0:          https://cran.r-project.org/src/contrib/%{packname}_%{version}.
 # Here's the R view of the dependencies world:
 # Depends:
 # Imports:   R-grDevices, R-htmltools >= 0.3, R-jsonlite >= 0.9.16, R-yaml
-# Suggests:  R-knitr >= 1.8
+# Suggests:  R-knitr >= 1.8, R-rmarkdown, R-testthat
 # LinkingTo:
 # Enhances:
 
@@ -27,9 +29,13 @@ BuildRequires:    R-grDevices
 BuildRequires:    R-htmltools >= 0.3
 BuildRequires:    R-jsonlite >= 0.9.16
 BuildRequires:    R-yaml
+%if %{without bootstrap}
 %if %{with_doc}
 BuildRequires:    R-knitr >= 1.8
 %endif
+BuildRequires:    R-rmarkdown
+BuildRequires:    R-testthat
+%endif
 
 %description
 A framework for creating HTML widgets that render in various contexts
@@ -52,11 +58,13 @@ rm -f %{buildroot}%{rlibdir}/R.css
 
 
 %check
+%if %{without bootstrap}
 %if %{with_doc}
 %{_bindir}/R CMD check %{packname}
 %else
 _R_CHECK_FORCE_SUGGESTS_=0 %{_bindir}/R CMD check %{packname} --ignore-vignettes
 %endif
+%endif
 
 %files
 %dir %{rlibdir}/%{packname}
@@ -75,6 +83,11 @@ _R_CHECK_FORCE_SUGGESTS_=0 %{_bindir}/R CMD check %{packname} --ignore-vignettes
 
 
 %changelog
+* Fri Jun 11 2021 Tom Callaway <spot@fedoraproject.org> - 1.5.3-1
+- update to 1.5.3
+- Rebuilt for R 4.1.0
+- bootstrap
+
 * Mon Jan 25 2021 Fedora Release Engineering <releng@fedoraproject.org> - 1.5.1-5
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_34_Mass_Rebuild
 
diff --git a/sources b/sources
index e1842d8..07306f1 100644
--- a/sources
+++ b/sources
@@ -1 +1 @@
-SHA512 (htmlwidgets_1.5.1.tar.gz) = efd1351c0d1c41baed3d649c156ecd88643e4e9658075c97b0ec562c336ca11b8030945bbcf27a03b9b1a85c7e09b90e89e151763b5c7c3fa79848e04c38ba68
+SHA512 (htmlwidgets_1.5.3.tar.gz) = 6f7551f92f7ac76c99044651c763eb51fb5f82bd0d03b890698e0a3fca80e2ee010cdf5c0940c6b8a4ebebf9861d3c343d3cd1ac1953b08011fb3cddd11a6b75