diff --git a/DESCRIPTION b/DESCRIPTION
index ea463e4..52032f3 100644
--- a/DESCRIPTION
+++ b/DESCRIPTION
@@ -34,4 +34,4 @@ Suggests:
     rmarkdown
 VignetteBuilder: knitr
 Config/roxygen2/markdown: TRUE
-Config/roxygen2/version: 8.1.0
+Config/roxygen2/version: 8.1.1
diff --git a/R/formatoutput.R b/R/formatoutput.R
index a6dc2dc..63486cf 100644
--- a/R/formatoutput.R
+++ b/R/formatoutput.R
@@ -22,9 +22,13 @@ print.pc_ops = \(x,...) {
 plot.pc_single = \(x, family = "serif", ...){
   causdf = x$summary
   
-  ggplot2::ggplot(causdf, ggplot2::aes(x = type, y = strength, fill = type)) +
+  ggplot2::ggplot(causdf, 
+                  ggplot2::aes(x = .data[["type"]], 
+                               y = .data[["strength"]], 
+                               fill = .data[["type"]])) +
     ggplot2::geom_col() +
-    ggplot2::geom_text(ggplot2::aes(label = round(strength, 3)), vjust = -0.5) +
+    ggplot2::geom_text(ggplot2::aes(label = round(.data[["strength"]], 3)), 
+                       vjust = -0.5) +
     ggplot2::scale_y_continuous(
       limits = c(0, max(causdf$strength) * 1.1),
       expand = ggplot2::expansion(mult = c(0, 0.1)),
@@ -52,7 +56,10 @@ plot.pc_boot = \(x, family = "serif",
   if(is.null(xlimits)) xlimits = c(min(xbreaks) - 1,max(xbreaks) + 1)
   if(is.null(ylimits)) ylimits = c(-0.01, max(causdf$q50) + 0.1)
 
-  ggplot2::ggplot(causdf, ggplot2::aes(x = libsizes, y = q50, color = type)) +
+  ggplot2::ggplot(causdf, 
+                  ggplot2::aes(x = .data[["libsizes"]], 
+                               y = .data[["q50"]], 
+                               color = .data[["type"]])) +
     ggplot2::geom_line(linewidth = 1.25) +
     ggplot2::scale_color_manual(name = NULL,
                                 values = c("dark" = "#6A0DAD", 
diff --git a/R/globals.R b/R/globals.R
deleted file mode 100644
index e04a6f9..0000000
--- a/R/globals.R
+++ /dev/null
@@ -1 +0,0 @@
-utils::globalVariables(c("libsizes", "strength", "type", "q50"))
\ No newline at end of file
diff --git a/R/pc-package.R b/R/pc-package.R
index 0e5c32b..cbbf396 100644
--- a/R/pc-package.R
+++ b/R/pc-package.R
@@ -2,3 +2,9 @@
 #' @useDynLib pc, .registration = TRUE
 ## usethis namespace: end
 NULL
+
+utils::globalVariables(".data")
+
+.onLoad = \(...) {
+  requireNamespace("Rcpp", quietly = TRUE)
+}
diff --git a/R/zzz.R b/R/zzz.R
deleted file mode 100644
index f45e1d2..0000000
--- a/R/zzz.R
+++ /dev/null
@@ -1,3 +0,0 @@
-.onLoad = \(...) {
-  requireNamespace("Rcpp", quietly = TRUE)
-}