diff --git a/REQUIRE b/REQUIRE
index 04b7f31e..0871e558 100644
--- a/REQUIRE
+++ b/REQUIRE
@@ -1,4 +1,4 @@
-julia 0.4
+julia 0.3
 
 Colors
 Reexport
diff --git a/src/colors.jl b/src/colors.jl
index 9c2fd3d5..2c6dc78a 100644
--- a/src/colors.jl
+++ b/src/colors.jl
@@ -337,7 +337,7 @@ function generate_colorgradient(bgcolor = colorant"white";
   gradient_from_list(colors)
 end
 
-function get_color_palette(palette, bgcolor::Union{Colorant,ColorWrapper}, numcolors::Integer)
+function get_color_palette(palette, bgcolor::@compat(Union{Colorant,ColorWrapper}), numcolors::Integer)
   grad = if palette == :auto
     generate_colorgradient(bgcolor)
   else
diff --git a/test/REQUIRE b/test/REQUIRE
index 8dbd52ff..a5de3587 100644
--- a/test/REQUIRE
+++ b/test/REQUIRE
@@ -1,4 +1,4 @@
-julia 0.4
+julia 0.3
 
 Colors
 Reexport