diff --git a/DESCRIPTION b/DESCRIPTION
index 1a4dcc2..06142c8 100644
--- a/DESCRIPTION
+++ b/DESCRIPTION
@@ -20,11 +20,11 @@ Depends:
   R (>= 3.0.2)
 Imports:
     jsonlite (>= 0.9.16),
+    rmarkdown,
 Suggests:
     shiny (>= 1.5.0),
     fontawesome (>= 0.3.0),
     knitr,
-    rmarkdown,
     htmltools,
     testthat
 License: GPL-3 | file LICENSE
diff --git a/R/shinyModule.R b/R/shinyModule.R
index 830dd1f..05db796 100644
--- a/R/shinyModule.R
+++ b/R/shinyModule.R
@@ -16,44 +16,41 @@
 #' @rdname reactlog_module
 #' @export
 #' @examples
-#' if (!require("shiny")) {
-#'   message("`shiny` required to run example")
-#'   return()
-#' }
-#'
-#' library(shiny)
-#' # Enable reactlog
-#' reactlog_enable()
+#' if (requireNamespace("shiny", quietly = TRUE)) {
+#'   library(shiny)
+#'   # Enable reactlog
+#'   reactlog_enable()
 #'
-#' # Define UI for app that draws a histogram ----
-#' ui <- fluidPage(
-#'   tags$h1("Pythagorean theorem"),
-#'   numericInput("a", "A", 3),
-#'   numericInput("b", "B", 4),
-#'   "C:", verbatimTextOutput("c"),
-#' ### start ui module
-#'   reactlog_module_ui()
-#' ### end ui module
-#' )
+#'   # Define UI for app that draws a histogram ----
+#'   ui <- fluidPage(
+#'     tags$h1("Pythagorean theorem"),
+#'     numericInput("a", "A", 3),
+#'     numericInput("b", "B", 4),
+#'     "C:", verbatimTextOutput("c"),
+#'   ### start ui module
+#'     reactlog_module_ui()
+#'   ### end ui module
+#'   )
 #'
-#' server <- function(input, output, session) {
-#'   a2 <- reactive({a <- input$a; req(a); a * a}, label = "a^2")
-#'   b2 <- reactive({b <- input$b; req(b); b * b}, label = "b^2")
-#'   c2 <- reactive({a2() + b2()}, label = "c^2")
-#'   c_val <- reactive({sqrt(c2())}, label = "c")
+#'   server <- function(input, output, session) {
+#'     a2 <- reactive({a <- input$a; req(a); a * a}, label = "a^2")
+#'     b2 <- reactive({b <- input$b; req(b); b * b}, label = "b^2")
+#'     c2 <- reactive({a2() + b2()}, label = "c^2")
+#'     c_val <- reactive({sqrt(c2())}, label = "c")
 #'
-#'   output$c <- renderText({
-#'     c_val()
-#'   })
+#'     output$c <- renderText({
+#'       c_val()
+#'     })
 #'
-#' ### start server module
-#'   reactlog_module_server()
-#' ### end server module
+#'   ### start server module
+#'     reactlog_module_server()
+#'   ### end server module
 #'
-#' }
+#'   }
 #'
-#' if (interactive()) {
-#'   shinyApp(ui = ui, server = server)
+#'   if (interactive()) {
+#'     shinyApp(ui = ui, server = server)
+#'   }
 #' }
 reactlog_module_ui <- function(include_refresh = TRUE, id = "reactlog_module") {
   ns <- shiny::NS(id)
@@ -135,7 +132,7 @@ shiny_version_required <- function() {
 test_shiny_version <- function() {
   tryCatch({
     utils::packageVersion("shiny") >= shiny_version_required()
-  }, error = function() {
+  }, error = function(e) {
     # package not found
     FALSE
   })
diff --git a/man/reactlog_module.Rd b/man/reactlog_module.Rd
index 16dccf7..ca230b7 100644
--- a/man/reactlog_module.Rd
+++ b/man/reactlog_module.Rd
@@ -32,44 +32,41 @@ To open the reactlog at a particular step, be sure to mark your time points
 with \code{Cmd+Shift+F3} (Windows: \code{Ctrl+Shift+F3})
 }
 \examples{
-if (!require("shiny")) {
-  message("`shiny` required to run example")
-  return()
-}
-
-library(shiny)
-# Enable reactlog
-reactlog_enable()
+if (requireNamespace("shiny", quietly = TRUE)) {
+  library(shiny)
+  # Enable reactlog
+  reactlog_enable()
 
-# Define UI for app that draws a histogram ----
-ui <- fluidPage(
-  tags$h1("Pythagorean theorem"),
-  numericInput("a", "A", 3),
-  numericInput("b", "B", 4),
-  "C:", verbatimTextOutput("c"),
-### start ui module
-  reactlog_module_ui()
-### end ui module
-)
+  # Define UI for app that draws a histogram ----
+  ui <- fluidPage(
+    tags$h1("Pythagorean theorem"),
+    numericInput("a", "A", 3),
+    numericInput("b", "B", 4),
+    "C:", verbatimTextOutput("c"),
+  ### start ui module
+    reactlog_module_ui()
+  ### end ui module
+  )
 
-server <- function(input, output, session) {
-  a2 <- reactive({a <- input$a; req(a); a * a}, label = "a^2")
-  b2 <- reactive({b <- input$b; req(b); b * b}, label = "b^2")
-  c2 <- reactive({a2() + b2()}, label = "c^2")
-  c_val <- reactive({sqrt(c2())}, label = "c")
+  server <- function(input, output, session) {
+    a2 <- reactive({a <- input$a; req(a); a * a}, label = "a^2")
+    b2 <- reactive({b <- input$b; req(b); b * b}, label = "b^2")
+    c2 <- reactive({a2() + b2()}, label = "c^2")
+    c_val <- reactive({sqrt(c2())}, label = "c")
 
-  output$c <- renderText({
-    c_val()
-  })
+    output$c <- renderText({
+      c_val()
+    })
 
-### start server module
-  reactlog_module_server()
-### end server module
+  ### start server module
+    reactlog_module_server()
+  ### end server module
 
-}
+  }
 
-if (interactive()) {
-  shinyApp(ui = ui, server = server)
+  if (interactive()) {
+    shinyApp(ui = ui, server = server)
+  }
 }
 }
 \seealso{