diff --git a/Project.toml b/Project.toml
index c529ed31..81aed21a 100644
--- a/Project.toml
+++ b/Project.toml
@@ -42,7 +42,7 @@ Measures = "0.3"
 NaNMath = "0.3"
 PGFPlotsX = "1.2.0"
 PlotThemes = "2"
-PlotUtils = "0.7"
+PlotUtils = "1"
 RecipesBase = "1"
 RecipesPipeline = "0.1.3"
 Reexport = "0.2"
diff --git a/src/backends/gr.jl b/src/backends/gr.jl
index 04166e3f..fe24d05f 100644
--- a/src/backends/gr.jl
+++ b/src/backends/gr.jl
@@ -1668,7 +1668,7 @@ function gr_display(sp::Subplot{GRBackend}, w, h, viewport_canvas)
                         @warn "GR: transparency not supported in non-uniform heatmaps. Alpha values ignored."
                     end
                     colors = get(fillgrad, z, clims)
-                    z_normalized = map(c -> c == invisible() ? 256/255 : getinverse(fillgrad, c), colors)
+                    z_normalized = map(c -> c == invisible() ? 256/255 : PlotUtils.getinverse(fillgrad, c), colors)
                     rgba = Int32[round(Int32, 1000 + _i * 255) for _i in z_normalized]
                     GR.nonuniformcellarray(x, y, w, h, rgba)
                 end
@@ -1685,7 +1685,7 @@ function gr_display(sp::Subplot{GRBackend}, w, h, viewport_canvas)
                     @warn "Right now only the maximum value of y (r) is taken into account."
                 end
                 colors = get(fillgrad, z, clims)
-                z_normalized = map(c -> c == invisible() ? 256/255 : getinverse(fillgrad.colors, c), colors)
+                z_normalized = map(c -> c == invisible() ? 256/255 : PlotUtils.getinverse(fillgrad.colors, c), colors)
                 rgba = Int32[round(Int32, 1000 + _i * 255) for _i in z_normalized]
                 # GR.polarcellarray(0, 0, phimin, phimax, ymin, ymax, nx, ny, colors)
                 GR.polarcellarray(0, 0, phimin, phimax, 0, ymax, nx, ny, rgba)