diff --git a/.lintr b/.lintr
index 4194039..8463a82 100644
--- a/.lintr
+++ b/.lintr
@@ -1,10 +1,9 @@
-linters: with_defaults(
-    line_length_linter(100),
-    assignment_linter = NULL,
-    undesirable_operator_linter = undesirable_operator_linter(
-        with_defaults(
-                default_undesirable_operators,
-                "<-" = "Use =, not <-, for assignment."
-        )
-    )
-  )
+linters: linters_with_defaults(
+  assignment_linter = NULL,
+  indentation_linter = NULL,
+  commented_code_linter = NULL,
+  object_length_linter = NULL,
+  line_length_linter(100),
+  cyclocomp_linter(complexity_limit = 15),
+  undesirable_operator_linter = undesirable_operator_linter(
+    op = list("<-" = "Please use '=' for assignment")))
diff --git a/DESCRIPTION b/DESCRIPTION
index 8308fa4..ceaa0bf 100644
--- a/DESCRIPTION
+++ b/DESCRIPTION
@@ -1,11 +1,11 @@
 Package: datasauRus
 Title: Datasets from the Datasaurus Dozen
-Version: 0.1.8
+Version: 0.1.9
 Authors@R: c(
     person("Colin", "Gillespie", , "colin@jumpingrivers.com", role = c("cre", "aut")),
     person("Steph", "Locke", , "stephanie.g.locke@gmail.com", role = "aut"),
     person("Alberto", "Cairo", , "alberto.cairo@gmail.com", role = "dtc"),
-    person("Rhian", "Davies", , "statsrhian@gmail.com", role = c("aut")),
+    person("Rhian", "Davies", , "statsrhian@gmail.com", role = "aut"),
     person("Justin", "Matejka", , "Justin.Matejka@autodesk.com", role = "dtc"),
     person("George", "Fitzmaurice", , "George.Fitzmaurice@autodesk.com", role = "dtc"),
     person("Lucy", "D'Agostino McGowan", , "ld.mcgowan@vanderbilt.edu", role = "aut"),
@@ -42,7 +42,7 @@ Suggests:
 VignetteBuilder: 
     knitr
 Encoding: UTF-8
+Language: en-US
 LazyData: true
 Roxygen: list(markdown = TRUE)
-RoxygenNote: 7.2.3
-Language: en-US
+RoxygenNote: 7.3.2
diff --git a/Datasaurus.Rproj b/Datasaurus.Rproj
index 30e02be..3084ca7 100644
--- a/Datasaurus.Rproj
+++ b/Datasaurus.Rproj
@@ -1,4 +1,5 @@
 Version: 1.0
+ProjectId: 16075796-80fe-42ac-87e0-61c1c1ac3f33
 
 RestoreWorkspace: No
 SaveWorkspace: No
diff --git a/NEWS.md b/NEWS.md
index b4c7bf5..ef4065d 100644
--- a/NEWS.md
+++ b/NEWS.md
@@ -1,3 +1,6 @@
+# datasauRus 0.1.9
+* Spring clean: linting
+
 # datasauRus 0.1.8
 
 * Update maintainer
diff --git a/tests/testthat/test-datasets.R b/tests/testthat/test-datasets.R
index 91c1e31..3e7d0ed 100644
--- a/tests/testthat/test-datasets.R
+++ b/tests/testthat/test-datasets.R
@@ -1,10 +1,10 @@
 context("datasets")
 
 datashapetests = function(df, ncols, nrows, uniquecol = NULL, nuniques = NULL) {
-  expect_equal(ncol(df), ncols)
-  expect_equal(nrow(df), nrows)
+  testthat::expect_equal(ncol(df), ncols)
+  testthat::expect_equal(nrow(df), nrows)
   if (!is.null(uniquecol)) {
-    expect_equal(nrow(unique(df[uniquecol])), nuniques)
+    testthat::expect_equal(nrow(unique(df[uniquecol])), nuniques)
   }
 }
 
diff --git a/vignettes/Datasaurus.Rmd b/vignettes/Datasaurus.Rmd
index 59a1921..cd8adc3 100644
--- a/vignettes/Datasaurus.Rmd
+++ b/vignettes/Datasaurus.Rmd
@@ -24,10 +24,10 @@ To see that statistics are (almost) the same for each sub-dataset, you can use `
 
 ```{r}
 library(datasauRus)
-if(requireNamespace("dplyr")){
+if (requireNamespace("dplyr")) {
   suppressPackageStartupMessages(library(dplyr))
-  datasaurus_dozen %>% 
-    group_by(dataset) %>% 
+  datasaurus_dozen %>%
+    group_by(dataset) %>%
     summarize(
       mean_x    = mean(x),
       mean_y    = mean(y),
@@ -41,12 +41,12 @@ if(requireNamespace("dplyr")){
 To see that each sub-dataset looks very different, you can draw scatter plots.
 
 ```{r fig.height=12, fig.width=9}
-if(requireNamespace("ggplot2")){
+if (requireNamespace("ggplot2")) {
   library(ggplot2)
-  ggplot(datasaurus_dozen, aes(x = x, y = y, colour = dataset))+
-    geom_point()+
-    theme_void()+
-    theme(legend.position = "none")+
+  ggplot(datasaurus_dozen, aes(x = x, y = y, colour = dataset)) +
+    geom_point() +
+    theme_void() +
+    theme(legend.position = "none") +
     facet_wrap(~dataset, ncol = 3)
 }
 ```