diff --git a/Project.toml b/Project.toml
index aa143d1..2f0d34c 100644
--- a/Project.toml
+++ b/Project.toml
@@ -1,7 +1,7 @@
 name = "ImageView"
 uuid = "86fae568-95e7-573e-a6b2-d8a6b900c9ef"
 author = ["Tim Holy <tim.holy@gmail.com"]
-version = "0.12.5"
+version = "0.12.6"
 
 [deps]
 AxisArrays = "39de3d68-74b9-583c-8d2d-e117c070f3a9"
@@ -24,7 +24,7 @@ Cairo = "0.6, 0.7, 0.8, 1"
 Compat = "3, 4"
 Graphics = "0.2, 0.3, 0.4, 1"
 GtkObservables = "2.1"
-Gtk4 = "0.6.2"
+Gtk4 = "0.6.2, 0.7"
 ImageBase = "0.1"
 ImageCore = "0.9, 0.10"
 ImageMetadata = "0.9"
diff --git a/src/contrast_gui.jl b/src/contrast_gui.jl
index 3272b30..bc82c4b 100644
--- a/src/contrast_gui.jl
+++ b/src/contrast_gui.jl
@@ -83,7 +83,7 @@ function contrast_gui(enabled::Observable{Bool}, hist::Observable, clim::Observa
     end
     updateclim = map(smin, smax) do cmin, cmax
         # if min/max is outside the current range, update the sliders
-        adj = Gtk4.GtkAdjustment(widget(cgui["slider_min"]))
+        adj = Gtk4.adjustment(widget(cgui["slider_min"]))
         rmin, rmax = Gtk4.G_.get_lower(adj), Gtk4.G_.get_upper(adj)
         if cmin < rmin || cmax > rmax || cmax-cmin < Δ
             # Also, don't cross the sliders