diff --git a/.travis.yml b/.travis.yml
index 1f4ade6..7471745 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,35 +1,20 @@
-## Documentation: http://docs.travis-ci.com/user/languages/julia/
+# Documentation: http://docs.travis-ci.com/user/languages/julia/
 language: julia
 os:
   - linux
   - osx
 julia:
-  - 0.6
+  - 1.0
   - nightly
-notifications:
-  email: false
-git:
-  depth: 99999999
-
-## uncomment the following lines to allow failures on nightly julia
-## (tests will run but not make your overall status red)
 matrix:
   allow_failures:
-  - julia: nightly
-
-## uncomment and modify the following lines to manually install system packages
-#addons:
-#  apt: # apt-get for linux
-#    packages:
-#    - gfortran
-#before_script: # homebrew for mac
-#  - if [ $TRAVIS_OS_NAME = osx ]; then brew install gcc; fi
-
-## uncomment the following lines to override the default test script
+    - julia: nightly
+notifications:
+  email: false
+# uncomment the following lines to override the default test script
 #script:
+#  - if [[ -a .git/shallow ]]; then git fetch --unshallow; fi
 #  - julia -e 'Pkg.clone(pwd()); Pkg.build("LASindex"); Pkg.test("LASindex"; coverage=true)'
+
 after_success:
-  # push coverage results to Coveralls
-  - julia -e 'cd(Pkg.dir("LASindex")); Pkg.add("Coverage"); using Coverage; Coveralls.submit(Coveralls.process_folder())'
-  # push coverage results to Codecov
-  - julia -e 'cd(Pkg.dir("LASindex")); Pkg.add("Coverage"); using Coverage; Codecov.submit(Codecov.process_folder())'
+- julia -e 'cd(Pkg.dir("LASindex")); Pkg.add("Coverage"); using Coverage; Codecov.submit(Codecov.process_folder())'
diff --git a/REQUIRE b/REQUIRE
index 8ce40fd..11bbfbf 100644
--- a/REQUIRE
+++ b/REQUIRE
@@ -1,3 +1,4 @@
-julia 0.6
-RegionTrees 0.1.0
+julia 0.7
+RegionTrees 0.2.0
 FileIO
+StaticArrays
diff --git a/appveyor.yml b/appveyor.yml
index 1a57883..9aa56ab 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -1,16 +1,17 @@
 environment:
   matrix:
-  - JULIA_URL: "https://julialang-s3.julialang.org/bin/winnt/x86/0.6/julia-0.6-latest-win32.exe"
-  - JULIA_URL: "https://julialang-s3.julialang.org/bin/winnt/x64/0.6/julia-0.6-latest-win64.exe"
-  - JULIA_URL: "https://julialangnightlies-s3.julialang.org/bin/winnt/x86/julia-latest-win32.exe"
-  - JULIA_URL: "https://julialangnightlies-s3.julialang.org/bin/winnt/x64/julia-latest-win64.exe"
-
-## uncomment the following lines to allow failures on nightly julia
-## (tests will run but not make your overall status red)
-matrix:
-  allow_failures:
-  - JULIA_URL: "https://julialangnightlies-s3.julialang.org/bin/winnt/x86/julia-latest-win32.exe"
-  - JULIA_URL: "https://julialangnightlies-s3.julialang.org/bin/winnt/x64/julia-latest-win64.exe"
+  - julia_version: 1.0
+  - julia_version: nightly
+
+platform:
+  - x86 # 32-bit
+  - x64 # 64-bit
+
+# # Uncomment the following lines to allow failures on nightly julia
+# # (tests will run but not make your overall status red)
+# matrix:
+#   allow_failures:
+#   - julia_version: nightly
 
 branches:
   only:
@@ -24,24 +25,18 @@ notifications:
     on_build_status_changed: false
 
 install:
-  - ps: "[System.Net.ServicePointManager]::SecurityProtocol = [System.Net.SecurityProtocolType]::Tls12"
-# If there's a newer build queued for the same PR, cancel this one
-  - ps: if ($env:APPVEYOR_PULL_REQUEST_NUMBER -and $env:APPVEYOR_BUILD_NUMBER -ne ((Invoke-RestMethod `
-        https://ci.appveyor.com/api/projects/$env:APPVEYOR_ACCOUNT_NAME/$env:APPVEYOR_PROJECT_SLUG/history?recordsNumber=50).builds | `
-        Where-Object pullRequestId -eq $env:APPVEYOR_PULL_REQUEST_NUMBER)[0].buildNumber) { `
-        throw "There are newer queued builds for this pull request, failing early." }
-# Download most recent Julia Windows binary
-  - ps: (new-object net.webclient).DownloadFile(
-        $env:JULIA_URL,
-        "C:\projects\julia-binary.exe")
-# Run installer silently, output to C:\projects\julia
-  - C:\projects\julia-binary.exe /S /D=C:\projects\julia
+  - ps: iex ((new-object net.webclient).DownloadString("https://raw.githubusercontent.com/JuliaCI/Appveyor.jl/version-1/bin/install.ps1"))
 
 build_script:
-# Need to convert from shallow to complete for Pkg.clone to work
-  - IF EXIST .git\shallow (git fetch --unshallow)
-  - C:\projects\julia\bin\julia -e "versioninfo();
-      Pkg.clone(pwd(), \"LASindex\"); Pkg.build(\"LASindex\")"
+  - echo "%JL_BUILD_SCRIPT%"
+  - C:\julia\bin\julia -e "%JL_BUILD_SCRIPT%"
 
 test_script:
-  - C:\projects\julia\bin\julia -e "Pkg.test(\"LASindex\")"
+  - echo "%JL_TEST_SCRIPT%"
+  - C:\julia\bin\julia -e "%JL_TEST_SCRIPT%"
+
+# # Uncomment to support code coverage upload. Should only be enabled for packages
+# # which would have coverage gaps without running on Windows
+# on_success:
+#   - echo "%JL_CODECOV_SCRIPT%"
+#   - C:\julia\bin\julia -e "%JL_CODECOV_SCRIPT%"
diff --git a/src/LASindex.jl b/src/LASindex.jl
index 6347c19..35c0904 100644
--- a/src/LASindex.jl
+++ b/src/LASindex.jl
@@ -1,10 +1,8 @@
-__precompile__()
-
 module LASindex
 
     using FileIO
     using RegionTrees
-    using StaticArrays 
+    using StaticArrays
 
     export
     quadtree
diff --git a/src/fileio.jl b/src/fileio.jl
index b4007a5..27c3a8e 100644
--- a/src/fileio.jl
+++ b/src/fileio.jl
@@ -1,6 +1,6 @@
 using FileIO
 
-type LaxHeader
+struct LaxHeader
     version::UInt32
 end
 
@@ -10,7 +10,7 @@ function Base.read(io::IO, ::Type{LaxHeader})
         )
 end
 
-type LaxQuadtreeHeader
+struct LaxQuadtreeHeader
     ssignature::UInt32  # LASS
     stype::UInt32
     qsignature::UInt32  # LASQ
@@ -41,7 +41,7 @@ function Base.read(io::IO, ::Type{LaxQuadtreeHeader})
     )
 end
 
-type LaxIntervalHeader
+struct LaxIntervalHeader
     signature::UInt32
     version::UInt32
     number_cells::UInt32
@@ -55,7 +55,7 @@ function Base.read(io::IO, ::Type{LaxIntervalHeader})
     )
 end
 
-type LaxIntervalCell
+struct LaxIntervalCell
     cell_index::Int32
     number_intervals::UInt32
     number_points::UInt32
@@ -69,7 +69,7 @@ function Base.read(io::IO, ::Type{LaxIntervalCell})
     )
 end
 
-type LaxIntervalCellInterval
+struct LaxIntervalCellInterval
     _start::UInt32
     _end::UInt32
 end
@@ -112,7 +112,7 @@ function load(s::Stream{format"LAX"})
         # Read cell and its intervals
         qcell = read(s, LaxIntervalCell)
         total_points += qcell.number_points
-        intervals = Vector{UnitRange{Integer}}(qcell.number_intervals)
+        intervals = Vector{UnitRange{Integer}}(undef, qcell.number_intervals)
 
         for j = 1:qcell.number_intervals
             intervals[j] = read(s, UnitRange{Integer})
@@ -126,7 +126,7 @@ function load(s::Stream{format"LAX"})
     # assert we are at end of file
     @assert eof(s)
 
-    info("Processed $(get(s.filename, ".lax")) with $(total_points) points.")
+    @info("Processed $(s.filename) with $(total_points) points.")
 
     return qt
 end
diff --git a/src/quadtree.jl b/src/quadtree.jl
index 93261af..213e774 100644
--- a/src/quadtree.jl
+++ b/src/quadtree.jl
@@ -13,7 +13,7 @@ end
 """Split a quadtree until the requested index is reached."""
 function quadtree!(root::RegionTrees.Cell, index::Integer)
     places = zlevels(index)
-    places = flipdim(places, 1)  # bottom up
+    places = reverse(places, dims=1)  # bottom up
 
     for place in places
         (place != 0) && (isleaf(root)) && (split!(root))
diff --git a/src/util.jl b/src/util.jl
index efee036..07cbaee 100644
--- a/src/util.jl
+++ b/src/util.jl
@@ -1,5 +1,8 @@
 """Merge vector of UnitRanges into Vector of UnitRanges that do not overlap."""
 function merge(ranges::Vector{UnitRange{Integer}})
+    # prevent unwanted mutation
+    ranges = copy(ranges)
+
     # Skip if there's nothing to merge
     length(ranges) <= 1 && (return ranges)
 
diff --git a/test/runtests.jl b/test/runtests.jl
index 53ddcd1..5ed7b1f 100644
--- a/test/runtests.jl
+++ b/test/runtests.jl
@@ -2,7 +2,7 @@ using LASindex
 using FileIO
 using RegionTrees
 using StaticArrays
-using Base.Test 
+using Test
 
 workdir = dirname(@__FILE__)
 
@@ -54,6 +54,8 @@ LASindex.quadtree!(root, 1, [2:5])
 # Merge UnitRanges that do have overlap
 r = Vector{UnitRange{Integer}}([1:5, 2:4, 12:13, 14:16])
 @test LASindex.merge(r) == Vector{UnitRange{Integer}}([1:5, 12:16])
+# and again to make sure it's not mutating
+@test LASindex.merge(r) == Vector{UnitRange{Integer}}([1:5, 12:16])
 r = Vector{UnitRange{Integer}}([1:5, 2:6, 12:13, 14:16, -1:2])
 @test LASindex.merge(r) == Vector{UnitRange{Integer}}([-1:6, 12:16])
 r = Vector{UnitRange{Integer}}()