diff --git a/R/binless.R b/R/binless.R
index a1c237c..9654b0e 100644
--- a/R/binless.R
+++ b/R/binless.R
@@ -276,7 +276,7 @@ binlessfit <- function(o, conf.level = .95, llam.quant = NULL, span = NULL, ...)
 }
 
 .binlessvpcstats <-  function(o, qpred=c(0.05, 0.5, 0.95), conf.level=0.95, quantile.type=7, vpc.type, ...){
-  y <- x <- blq <- fit <- . <- repl <- cprop <- rqssmed <- llam.med <- c.rqssmed <-  NULL
+  y <- x <- blq <- fit <- . <- repl <- cprop <- rqssmed <- llam.med <- c.rqssmed <- lloq <- uloq <- alq <- NULL
 
   obs.fits <- o$rqss.obs.fits
   sim.fits <- o$rqss.sim.fits
diff --git a/R/plot.R b/R/plot.R
index e4e56c7..7ddf450 100644
--- a/R/plot.R
+++ b/R/plot.R
@@ -194,6 +194,7 @@ plot.tidyvpcobj <- function(x,
 #'   single-value groups
 #' @noRd
 expand_vpc_stats_single_value <- function(vpc, xvar, width = 0.0001) {
+  n_xvar <- NULL
   d_vpc_stats <- vpc$stats
   if (!is.null(vpc$strat)) {
     d_vpc_stats[, n_xvar := length(unique(get(xvar))), by = names(vpc$strat)]
@@ -508,7 +509,7 @@ plot_censored <-
            show.binning) {
 
     stopifnot(inherits(vpc, "tidyvpcobj"))
-    hi <- lo <- md <- xbin <- y <- NULL
+    hi <- lo <- md <- xbin <- y <- x <- xleft <- xright <- blq <- alq <- NULL
     . <- list
 
     method <- vpc$vpc.method$method
diff --git a/R/vpcstats.R b/R/vpcstats.R
index c461410..708d789 100644
--- a/R/vpcstats.R
+++ b/R/vpcstats.R
@@ -372,7 +372,7 @@ binning <- function(o, ...) UseMethod("binning")
 #' @rdname binning
 #' @export
 binning.tidyvpcobj <- function(o, bin, data=o$data, xbin="xmedian", centers, breaks, nbins, altx, stratum=NULL, by.strata=TRUE,  ...) {
-  keep <- i <- NULL
+  keep <- i <- ypc <- y <- NULL
   . <- list
 
   # If xbin is numeric, then that is the bin