diff --git a/R/ggsurvplot_core.R b/R/ggsurvplot_core.R
index 23fe85a..ebe8f96 100644
--- a/R/ggsurvplot_core.R
+++ b/R/ggsurvplot_core.R
@@ -435,12 +435,12 @@ ggsurvplot_core <- function(fit, data = NULL, fun = NULL,
         h_line_data <- data.frame(x = 0, y = max(df$y2), xend = max(df$x1), yend = max(df$y2))
         p <- p +
           geom_segment(aes(x = .data$x, y = .data$y, xend = .data$xend, yend = .data$yend),
-                       data = h_line_data, linetype = linetype, size = size, color = color) # horizontal segment
+                       data = h_line_data, linetype = linetype, linewidth = size, color = color) # horizontal segment
       }
 
       if(type %in% c("hv", "v"))
         p <- p + geom_segment(aes(x = .data$x1, y = .data$y1, xend = .data$x2, yend = .data$y2), data = df,
-                              linetype = linetype, size = size, color = color) # vertical segments
+                              linetype = linetype, linewidth = size, color = color) # vertical segments
     }
     else warning("Median survival not reached.")
   }
diff --git a/R/ggsurvplot_df.R b/R/ggsurvplot_df.R
index 6dc4f43..e506e54 100644
--- a/R/ggsurvplot_df.R
+++ b/R/ggsurvplot_df.R
@@ -177,7 +177,7 @@ ggsurvplot_df <- function(fit, fun = NULL,
   df[, .strata.var] <- factor( df[, .strata.var], levels = .levels(.strata), labels = legend.labs)
 
   p <- ggplot2::ggplot(df, ggplot2::aes(x = !!sym("time"), y = !!sym("surv"))) +
-    ggpubr::geom_exec(surv.geom, data = df, size = size, color = color, linetype = linetype, ...) +
+    ggpubr::geom_exec(surv.geom, data = df, linewidth = size, color = color, linetype = linetype, ...) +
     ggplot2::scale_y_continuous(breaks = y.breaks, labels = scale_labels, limits = ylim, expand = .expand) +
     ggplot2::coord_cartesian(xlim = xlim)+
     ggtheme
diff --git a/R/utilities.R b/R/utilities.R
index 1fc2025..ff50f7b 100644
--- a/R/utilities.R
+++ b/R/utilities.R
@@ -21,6 +21,11 @@ is_pkg_version_sup<- function(pkg, version){
   cc
 }
 
+# shim for ggplot2 prior to 3.5.2
+if (!exists("is_ggplot") && exists("is.ggplot")) {
+  is_ggplot <- is.ggplot
+}
+
 # Count the number of ggplots in a list
 .count_ggplots <- function(list.objects){
   nplot <- 0
diff --git a/tests/testthat/test-ggsurvplot_basic.R b/tests/testthat/test-ggsurvplot_basic.R
new file mode 100644
index 0000000..e8fe864
--- /dev/null
+++ b/tests/testthat/test-ggsurvplot_basic.R
@@ -0,0 +1,25 @@
+test_that("basic KM plot runs without {lifecycle} warnings", {
+  rlang::local_options(lifecycle_verbosity = "warning")
+
+  expect_no_warning(
+    {
+      ggsurvplot(
+        fit = survfit(Surv(time = time, event = status) ~ x, data = aml),
+        surv.median.line = "hv"
+      )
+    },
+    class = "lifecycle_warning_deprecated"
+  )
+})
+
+test_that("basic KM plot runs without {lifecycle} errors", {
+  expect_no_error(
+    {
+      ggsurvplot(
+        fit = survfit(Surv(time = time, event = status) ~ x, data = aml),
+        surv.median.line = "hv"
+      )
+    },
+    class = "lifecycle_error_deprecated"
+  )
+})