diff --git a/REQUIRE b/REQUIRE
index a69ea5d..2270289 100644
--- a/REQUIRE
+++ b/REQUIRE
@@ -1,4 +1,4 @@
-julia 0.6
+julia 0.7
 
 StaticArrays 0.6.0
 GeometryTypes 0.4.1
@@ -29,3 +29,5 @@ Images 0.9.0 # first version working on 0.6
 AxisArrays
 ImageAxes
 IndirectArrays
+
+Statistics
diff --git a/src/GLVisualize.jl b/src/GLVisualize.jl
index fe7db82..5d18cee 100644
--- a/src/GLVisualize.jl
+++ b/src/GLVisualize.jl
@@ -16,7 +16,7 @@ using Packing
 using SignedDistanceFields
 using FreeType
 import IterTools
-using Base.Markdown
+using Markdown
 using FreeTypeAbstraction
 
 import ColorVectorSpace
diff --git a/src/boundingbox.jl b/src/boundingbox.jl
index 15c08c5..82a73e7 100644
--- a/src/boundingbox.jl
+++ b/src/boundingbox.jl
@@ -46,7 +46,7 @@ function (B::Type{AABB{T}})(
         return primitive
     end
     tsr::Tuple{Point3f0, Vec3f0, Mat4f0}, state = next(ti, state)
-    points = decompose(Point3f0, primitive)::Vector{Point3f0}
+    points = decompose(Point3f0, primitive) #::Vector{Point3f0}
     bb = transform(tsr[1], tsr[2], tsr[3], points)
     while !done(ti, state)
         tsr, state = next(ti, state)
diff --git a/src/camera.jl b/src/camera.jl
index 09a6c2b..d3abd15 100644
--- a/src/camera.jl
+++ b/src/camera.jl
@@ -1,3 +1,5 @@
+using Statistics
+
 function cubeside_const_lift(_, id, mousehover)
     h_id, h_index = value(mousehover)
     if h_id == id && h_index >= 1 && h_index <= 6
@@ -28,7 +30,7 @@ function colored_cube()
     ydir    = Vec3f0(0f0,1f0,0f0)
     zdir    = Vec3f0(0f0,0f0,1f0)
     origin  = Vec3f0(-0.5)
-    const quads = [
+    quads = [
         (Quad(origin + zdir,   xdir, ydir), RGBA(1.0f0,0f0,0f0,1f0)), # Top
         (Quad(origin,          ydir, xdir), RGBA(0.5f0,0f0,0f0,1f0)), # Bottom
         (Quad(origin + ydir,   zdir, xdir), RGBA(0f0,1.0f0,0f0,1f0)), #Front
@@ -39,7 +41,7 @@ function colored_cube()
     cube_steering = merge(map(GLNormalMesh, quads))
 end
 
-Base.middle(r::SimpleRectangle{T}) where {T} = Point{2, T}(r.x+(r.w/T(2)), r.y+(r.mousehover/T(2)))
+middle(r::SimpleRectangle{T}) where {T} = Point{2, T}(r.x+(r.w/T(2)), r.y+(r.mousehover/T(2)))
 
 
 function get_rotation(m)
diff --git a/src/documentation.jl b/src/documentation.jl
index fa78da1..22500e1 100644
--- a/src/documentation.jl
+++ b/src/documentation.jl
@@ -13,7 +13,7 @@ end
 function print_type(x::TypeVar)
     string(x.name)
 end
-print_type(x::TypeName) = print_type(x.name)
+#print_type(x::TypeName) = print_type(x.name)
 print_type(x::UnionAll) = sprint(io-> show(io, x))
 print_type(x) = print_type(x.name)
 function print_type(x::Union)
diff --git a/src/gui/buttons.jl b/src/gui/buttons.jl
index 2ce6d44..f9ef281 100644
--- a/src/gui/buttons.jl
+++ b/src/gui/buttons.jl
@@ -144,7 +144,7 @@ end
 function widget(
         r::Signal{T}, screen::Screen;
         args...
-    ) where T <: Range
+    ) where T <: AbstractRange
     slider(value(r), screen; args...)
 end
 function playbutton(screen; icon_size = 10mm)
diff --git a/src/gui/numbers.jl b/src/gui/numbers.jl
index ceb83c5..87cffb4 100644
--- a/src/gui/numbers.jl
+++ b/src/gui/numbers.jl
@@ -1,3 +1,4 @@
+using Printf
 
 drag_x(drag_id) = drag_id[1][1]
 
@@ -39,9 +40,9 @@ function add_mouse_drags(t0, mouse_down1, mouseposition1, objectid, id_tolookfor
     (accum, mouse_down1, Vec2f0(0), 0, accum, 0)
 end
 
-Base.clamp(x, r::Range) = clamp(x, first(r), last(r))
+Base.clamp(x, r::AbstractRange) = clamp(x, first(r), last(r))
 
-function slide(startvalue, slide_pos, range::Range)
+function slide(startvalue, slide_pos, range::AbstractRange)
     val = startvalue + (slide_pos*step(range))
     clamp(val, range)
 end
diff --git a/src/parallel.jl b/src/parallel.jl
index 4465dcb..f4936bf 100644
--- a/src/parallel.jl
+++ b/src/parallel.jl
@@ -14,6 +14,7 @@ using FileIO
 using Packing
 using SignedDistanceFields
 using FreeType
+using Distributed
 
 
 # Parallel helper function to launch our glvisualize operations on the process,
diff --git a/src/renderloop.jl b/src/renderloop.jl
index f3ea057..493ef06 100644
--- a/src/renderloop.jl
+++ b/src/renderloop.jl
@@ -108,7 +108,7 @@ function fold_loop(v0, _)
     (val, range, index)
 end
 
-function loop(range::Range, rate=60)
+function loop(range::AbstractRange, rate=60)
     t = get_timer_signal(rate)
     map(first, foldp(fold_loop, (first(range), range, 1), t))
 end
@@ -125,7 +125,7 @@ function fold_bounce(v0, _)
     (val, range, index, direction)
 end
 
-function bounce(range::Range{T}, rate=60) where T
+function bounce(range::AbstractRange{T}, rate=60) where T
     t = get_timer_signal(rate)
     map(first, foldp(fold_bounce, (first(range), range, 1, 1), t))
 end
diff --git a/src/texture_atlas.jl b/src/texture_atlas.jl
index 72ce5a0..3af6402 100644
--- a/src/texture_atlas.jl
+++ b/src/texture_atlas.jl
@@ -34,14 +34,15 @@ begin #basically a singleton for the textureatlas
     # random list of chars we cache
     # basically to make runtests fast, until we figure out a better way to cache
     # newly rendered chars.
-    const local _tobe_cached = [
+    #const local _tobe_cached = [
+    local _tobe_cached = [
         'π','∮','⋅','→','∞','∑','∏','∀','∈','ℝ','⌈','⌉','−','⌊','⌋','α','∧','β','∨','ℕ','⊆','₀',
         '⊂','ℤ','ℚ','ℂ','⊥','≠','≡','≤','≪','⊤','⇒','⇔','₂','⇌','Ω','⌀',
     ]
-    const local _atlas_cache = Dict{WeakRef, TextureAtlas}()
-    const local _cache_path = joinpath(dirname(@__FILE__), "..", ".cache", "texture_atlas.jls")
-    const local _default_font = Vector{Ptr{FreeType.FT_FaceRec}}[]
-    const local _alternative_fonts = Vector{Ptr{FreeType.FT_FaceRec}}[]
+    local _atlas_cache = Dict{WeakRef, TextureAtlas}()
+    local _cache_path = joinpath(dirname(@__FILE__), "..", ".cache", "texture_atlas.jls")
+    local _default_font = Vector{Ptr{FreeType.FT_FaceRec}}[]
+    local _alternative_fonts = Vector{Ptr{FreeType.FT_FaceRec}}[]
 
     function defaultfont()
         if isempty(_default_font)
@@ -79,13 +80,13 @@ begin #basically a singleton for the textureatlas
                     TextureAtlas(fields...)
                 end
             catch e
-                info("You can likely ignore the following warning, if you just switched Julia versions for GLVisualize")
+                @info("You can likely ignore the following warning, if you just switched Julia versions for GLVisualize")
                 warn(e)
                 rm(_cache_path)
             end
         end
         atlas = TextureAtlas()
-        info("Caching fonts, this may take a while. Needed only on first run!")
+        @info("Caching fonts, this may take a while. Needed only on first run!")
         for c in '\u0000':'\u00ff' #make sure all ascii is mapped linearly
             insert_glyph!(atlas, c, defaultfont())
         end
diff --git a/src/types.jl b/src/types.jl
index 28286de..e04ab3a 100644
--- a/src/types.jl
+++ b/src/types.jl
@@ -2,12 +2,12 @@
 @enum RaymarchAlgorithm IsoValue Absorption MaximumIntensityProjection AbsorptionRGBA IndexedAbsorptionRGBA
 @enum CubeSides TOP BOTTOM FRONT BACK RIGHT LEFT
 
-struct Grid{N, T <: Range}
+struct Grid{N, T <: AbstractRange}
     dims::NTuple{N, T}
 end
 Base.ndims(::Grid{N,T}) where {N,T} = N
 
-Grid(ranges::Range...) = Grid(ranges)
+Grid(ranges::AbstractRange...) = Grid(ranges)
 function Grid(a::Array{T, N}) where {N, T}
     s = Vec{N, Float32}(size(a))
     smax = maximum(s)
@@ -74,8 +74,8 @@ import Base: getindex, length, next, start, done
 to_cpu_mem(x) = x
 to_cpu_mem(x::GPUArray) = gpu_data(x)
 
-const ScaleTypes = Union{Vector, Vec, AbstractFloat, Void, Grid}
-const PositionTypes = Union{Vector, Point, AbstractFloat, Void, Grid}
+const ScaleTypes = Union{Vector, Vec, AbstractFloat, Nothing, Grid}
+const PositionTypes = Union{Vector, Point, AbstractFloat, Nothing, Grid}
 
 mutable struct ScalarRepeat{T}
     scalar::T
@@ -132,22 +132,22 @@ end
 
 
 
-function ArrayOrStructOfArray(::Type{T}, array::Void, a, elements...) where T
+function ArrayOrStructOfArray(::Type{T}, array::Nothing, a, elements...) where T
     StructOfArrays(T, a, elements...)
 end
 function ArrayOrStructOfArray(::Type{T}, array::StaticVector, a, elements...) where T
     StructOfArrays(T, a, elements...)
 end
-function ArrayOrStructOfArray(::Type{T}, scalar::StaticVector, a::Void, elements::Void...) where T
+function ArrayOrStructOfArray(::Type{T}, scalar::StaticVector, a::Nothing, elements::Nothing...) where T
     ScalarRepeat(transform_convert(T, scalar))
 end
-function ArrayOrStructOfArray(::Type{T1}, array::Array{T2}, a::Void, elements::Void...) where {T1,T2}
+function ArrayOrStructOfArray(::Type{T1}, array::Array{T2}, a::Nothing, elements::Nothing...) where {T1,T2}
     array
 end
-function ArrayOrStructOfArray(::Type{T1}, grid::Grid, x::Void, y::Void, z::Array) where T1<:Point
+function ArrayOrStructOfArray(::Type{T1}, grid::Grid, x::Nothing, y::Nothing, z::Array) where T1<:Point
     GridZRepeat(grid, z)
 end
-function ArrayOrStructOfArray(::Type{T1}, array::Grid, a::Void, elements::Void...) where T1<:Point
+function ArrayOrStructOfArray(::Type{T1}, array::Grid, a::Nothing, elements::Nothing...) where T1<:Point
     array
 end
 function ArrayOrStructOfArray(::Type{T}, scalar::T) where T
@@ -259,7 +259,7 @@ struct GLVisualizeShader <: AbstractLazyShader
     kw_args::Dict{Symbol, Any}
     function GLVisualizeShader(paths::String...; view = Dict{String, String}(), kw_args...)
         # TODO properly check what extensions are available
-        @static if !is_apple()
+        @static if !Sys.isapple()
             view["GLSL_EXTENSIONS"] = "#extension GL_ARB_conservative_depth: enable"
             view["SUPPORTED_EXTENSIONS"] = "#define DETPH_LAYOUT"
         end
diff --git a/src/utils.jl b/src/utils.jl
index 70de077..8d5d709 100644
--- a/src/utils.jl
+++ b/src/utils.jl
@@ -13,7 +13,7 @@ isa_image(x::Matrix) = isa_image(typeof(x))
 isa_image(x) = false
 
 # Splits a dictionary in two dicts, via a condition
-function Base.split(condition::Function, associative::Associative)
+function Base.split(condition::Function, associative::AbstractDict)
     A = similar(associative)
     B = similar(associative)
     for (key, value) in associative
@@ -170,7 +170,7 @@ function dragged_on(robj::RenderObject, button::MouseButton, window::Screen)
     end)
 end
 
-points2f0(positions::Vector{T}, range::Range) where {T} = Point2f0[Point2f0(range[i], positions[i]) for i=1:length(range)]
+points2f0(positions::Vector{T}, range::AbstractRange) where {T} = Point2f0[Point2f0(range[i], positions[i]) for i=1:length(range)]
 
 extrema2f0(x::Array{T,N}) where {T<:Intensity,N} = Vec2f0(extrema(reinterpret(Float32,x)))
 extrema2f0(x::Array{T,N}) where {T,N} = Vec2f0(extrema(x))
diff --git a/src/videotool.jl b/src/videotool.jl
index 00e7479..a428e34 100644
--- a/src/videotool.jl
+++ b/src/videotool.jl
@@ -2,7 +2,7 @@
 # ffmpeg version
 # ffmpeg -r 24 -pattern_type glob -i '*.png' -vcodec libx264 -crf 25  -pix_fmt yuv420p test.mp4
 
-immutable VideoStream
+struct VideoStream
     io
     buffer
     window
diff --git a/src/visualize/image_like.jl b/src/visualize/image_like.jl
index 39ad16d..7ccb8f9 100644
--- a/src/visualize/image_like.jl
+++ b/src/visualize/image_like.jl
@@ -1,7 +1,6 @@
 """
 A matrix of colors is interpreted as an image
 """
-
 _default(::Signal{Array{RGBA{N0f8}, 2}}, ::Style{:default}, ::Dict{Symbol,Any})
 
 
diff --git a/src/visualize/lines.jl b/src/visualize/lines.jl
index 6333bce..b182726 100644
--- a/src/visualize/lines.jl
+++ b/src/visualize/lines.jl
@@ -42,7 +42,10 @@ function ticks(points, resolution)
 end
 
 
-function _default(position::Union{VecTypes{T}, MatTypes{T}}, s::style"lines", data::Dict) where T<:Point
+_default(position::Union{VecTypes{T}, MatTypes{T}}, s::style"lines", data::Dict) where T<:Point = _default_l(position, s, data)
+_default(position::Union{Array{T,1}, GPUArray{T,1}, Signal{Array{T,1}}}, s::style"lines", data::Dict) where T<:Point = _default_l(position, s, data)
+
+function _default_l(position::Union{VecTypes{T}, MatTypes{T}}, s::style"lines", data::Dict) where T<:Point
     pv = value(position)
     p_vec = if isa(position, GPUArray)
         position
@@ -137,7 +140,7 @@ function _default(positions::VecTypes{T}, s::style"linesegment", data::Dict) whe
     data
 end
 
-function _default(positions::Vector{T}, range::Range, s::style"lines", data::Dict) where T <: AbstractFloat
+function _default(positions::Vector{T}, range::AbstractRange, s::style"lines", data::Dict) where T <: AbstractFloat
     length(positions) != length(range) && throw(
         DimensionMismatsch("length of $(typeof(positions)) $(length(positions)) and $(typeof(range)) $(length(range)) must match")
     )
diff --git a/src/visualize/particles.jl b/src/visualize/particles.jl
index 17e4d64..14d3695 100644
--- a/src/visualize/particles.jl
+++ b/src/visualize/particles.jl
@@ -361,8 +361,7 @@ primitive_scale(c) = Vec2f0(0.1)
 Extracts the offset from a primitive.
 """
 #primitive_offset(prim::GeometryPrimitive) = Vec2f0(minimum(prim))
-
-primitive_offset(x, scale::Void) = Vec2f0(0) # default offset
+primitive_offset(x, scale::Nothing) = Vec2f0(0) # default offset
 primitive_offset(x, scale) = const_lift(/, scale, -2f0)  # default offset
 
 
diff --git a/src/visualize/text.jl b/src/visualize/text.jl
index c73ac59..eafaf8d 100644
--- a/src/visualize/text.jl
+++ b/src/visualize/text.jl
@@ -54,7 +54,7 @@ function Base.setindex!(t::Text, value::Char, i::Integer)
     t.scales[i] = gs
 end
 
-function Base.setindex!(t::Text, value::Associative, i::Integer)
+function Base.setindex!(t::Text, value::AbstractDict, i::Integer)
     for (k,v) in value
         getfield(t, k)[i] = v
     end