diff --git a/R/geom_half_point.R b/R/geom_half_point.R
index 0f0a7d9..0fd7018 100644
--- a/R/geom_half_point.R
+++ b/R/geom_half_point.R
@@ -18,7 +18,7 @@ geom_half_point <- function(
   stat = "HalfPoint", position = "dodge2",
   ...,
   side = "r",
-  transformation = position_jitter(),
+  transformation = position_jitter(height = 0),
   # transformation_params = list(width = NULL, height = NULL),
   range_scale = .75,
   na.rm = FALSE,
diff --git a/R/geom_half_point_panel.R b/R/geom_half_point_panel.R
index 6c34b57..63ee4e3 100644
--- a/R/geom_half_point_panel.R
+++ b/R/geom_half_point_panel.R
@@ -14,7 +14,7 @@ geom_half_point_panel <- function(
   stat = "identity", position = "identity",
   ...,
   side = "r",
-  transformation = position_jitter(),
+  transformation = position_jitter(height = 0),
   range_scale = .75,
   na.rm = FALSE,
   show.legend = NA,