diff --git a/.github/workflows/CI.yml b/.github/workflows/CI.yml
index 1725041..fe17277 100644
--- a/.github/workflows/CI.yml
+++ b/.github/workflows/CI.yml
@@ -13,10 +13,12 @@ jobs:
       fail-fast: false
       matrix:
         version:
-          - '1.1'
-#          - 'nightly'
+          - '1.6'
+          - '1'
         os:
           - ubuntu-latest
+          - windows-latest
+          - macOS-latest
         arch:
           - x64
     steps:
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..1d1d02a
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,2 @@
+
+Manifest.toml
diff --git a/Project.toml b/Project.toml
index ea546e3..b874d36 100644
--- a/Project.toml
+++ b/Project.toml
@@ -1,7 +1,7 @@
 name = "RFFT"
 uuid = "3bd9afcd-55df-531a-9b34-dc642dce7b95"
 authors = ["Tim Holy <tim.holy@gmail.com>"]
-version = "0.1.0"
+version = "1.0.0"
 
 [deps]
 FFTW = "7a1cc6ca-52ef-59f5-83cd-3a7055c09341"
diff --git a/REQUIRE b/REQUIRE
deleted file mode 100644
index 859ad46..0000000
--- a/REQUIRE
+++ /dev/null
@@ -1 +0,0 @@
-julia 0.7
diff --git a/src/RFFT.jl b/src/RFFT.jl
index 8ff8194..93eee73 100644
--- a/src/RFFT.jl
+++ b/src/RFFT.jl
@@ -9,39 +9,40 @@ import Base: real, complex, copy, copy!
 mutable struct RCpair{T<:AbstractFloat,N,RType<:AbstractArray{T,N},CType<:AbstractArray{Complex{T},N}}
     R::RType
     C::CType
-    region::Vector{Int}
+    dims::Vector{Int}
 end
 
-function RCpair{T}(::UndefInitializer, realsize::Dims{N}, region=1:length(realsize)) where {T<:AbstractFloat,N}
+function RCpair{T}(::UndefInitializer, realsize::Dims{N}, dims=1:length(realsize)) where {T<:AbstractFloat,N}
     sz = [realsize...]
-    firstdim = region[1]
+    firstdim = dims[1]
     sz[firstdim] = realsize[firstdim]>>1 + 1
     sz2 = copy(sz)
     sz2[firstdim] *= 2
     R = Array{T,N}(undef, (sz2...,)::Dims{N})
     C = unsafe_wrap(Array, convert(Ptr{Complex{T}}, pointer(R)), (sz...,)::Dims{N}) # work around performance problems of reinterpretarray
-    RCpair(view(R, map(n->1:n, realsize)...), C, [region...])
+    RCpair(view(R, map(n->1:n, realsize)...), C, [dims...])
 end
 
-RCpair(A::Array{T}, region=1:ndims(A)) where {T<:AbstractFloat} = copy!(RCpair{T}(undef, size(A), region), A)
+RCpair(A::Array{T}, dims=1:ndims(A)) where {T<:AbstractFloat} = copy!(RCpair{T}(undef, size(A), dims), A)
 
 real(RC::RCpair)    = RC.R
 complex(RC::RCpair) = RC.C
 
 copy!(RC::RCpair, A::AbstractArray{T}) where {T<:Real} = (copy!(RC.R, A); RC)
+copy!(RC::RCpair, A::AbstractArray{T}) where {T<:Complex} = (copy!(RC.C, A); RC)
 function copy(RC::RCpair{T,N}) where {T,N}
     C = copy(RC.C)
     R = reshape(reinterpret(T, C), size(parent(RC.R)))
-    RCpair(view(R, RC.R.indices...), C, copy(RC.region))
+    RCpair(view(R, RC.R.indices...), C, copy(RC.dims))
 end
 
 # New API
-rplan_fwd(R, C, region, flags, tlim) =
-    FFTW.rFFTWPlan{eltype(R),FFTW.FORWARD,true,ndims(R)}(R, C, region, flags, tlim)
-rplan_inv(R, C, region, flags, tlim) =
-   FFTW.rFFTWPlan{eltype(R),FFTW.BACKWARD,true,ndims(R)}(R, C, region, flags, tlim)
+rplan_fwd(R, C, dims, flags, tlim) =
+    FFTW.rFFTWPlan{eltype(R),FFTW.FORWARD,true,ndims(R)}(R, C, dims, flags, tlim)
+rplan_inv(R, C, dims, flags, tlim) =
+   FFTW.rFFTWPlan{eltype(R),FFTW.BACKWARD,true,ndims(R)}(R, C, dims, flags, tlim)
 function plan_rfft!(RC::RCpair{T}; flags::Integer = FFTW.ESTIMATE, timelimit::Real = FFTW.NO_TIMELIMIT) where T
-    p = rplan_fwd(RC.R, RC.C, RC.region, flags, timelimit)
+    p = rplan_fwd(RC.R, RC.C, RC.dims, flags, timelimit)
     return Z::RCpair -> begin
         FFTW.assert_applicable(p, Z.R, Z.C)
         FFTW.unsafe_execute!(p, Z.R, Z.C)
@@ -49,26 +50,24 @@ function plan_rfft!(RC::RCpair{T}; flags::Integer = FFTW.ESTIMATE, timelimit::Re
     end
 end
 function plan_irfft!(RC::RCpair{T}; flags::Integer = FFTW.ESTIMATE, timelimit::Real = FFTW.NO_TIMELIMIT) where T
-    p = rplan_inv(RC.C, RC.R, RC.region, flags, timelimit)
+    p = rplan_inv(RC.C, RC.R, RC.dims, flags, timelimit)
     return Z::RCpair -> begin
         FFTW.assert_applicable(p, Z.C, Z.R)
         FFTW.unsafe_execute!(p, Z.C, Z.R)
-        rmul!(Z.R, 1 / prod(size(Z.R)[Z.region]))
+        rmul!(Z.R, 1 / prod(size(Z.R)[Z.dims]))
         return Z
     end
 end
 function rfft!(RC::RCpair{T}) where T
-    p = rplan_fwd(RC.R, RC.C, RC.region, FFTW.ESTIMATE, FFTW.NO_TIMELIMIT)
+    p = rplan_fwd(RC.R, RC.C, RC.dims, FFTW.ESTIMATE, FFTW.NO_TIMELIMIT)
     FFTW.unsafe_execute!(p, RC.R, RC.C)
     return RC
 end
 function irfft!(RC::RCpair{T}) where T
-    p = rplan_inv(RC.C, RC.R, RC.region, FFTW.ESTIMATE, FFTW.NO_TIMELIMIT)
+    p = rplan_inv(RC.C, RC.R, RC.dims, FFTW.ESTIMATE, FFTW.NO_TIMELIMIT)
     FFTW.unsafe_execute!(p, RC.C, RC.R)
-    rmul!(RC.R, 1 / prod(size(RC.R)[RC.region]))
+    rmul!(RC.R, 1 / prod(size(RC.R)[RC.dims]))
     return RC
 end
 
-@deprecate RCpair(realtype::Type{T}, realsize, region=1:length(realsize)) where T<:AbstractFloat RCpair{T}(undef, realsize, region)
-
 end
diff --git a/test/runtests.jl b/test/runtests.jl
index 0bbfe8b..e049cd2 100644
--- a/test/runtests.jl
+++ b/test/runtests.jl
@@ -1,14 +1,16 @@
 import RFFT
 using Test, FFTW, LinearAlgebra
 
-@testset begin
-    for region in (1:2, 1, 2)
+@testset "RFFT.jl" begin
+    for dims in (1:2, 1, 2)
         for sz in ((5,6), (6,5))
-            pair = RFFT.RCpair{Float64}(undef, sz, region)
+            pair = RFFT.RCpair{Float64}(undef, sz, dims)
             r = @inferred(real(pair))
             c = @inferred(complex(pair))
             b = rand(eltype(r), size(r))
+            pair = RFFT.RCpair(b, dims)
             copyto!(r, b)
+            copy!(pair, c) # for coverage
             RFFT.rfft!(pair)
             RFFT.irfft!(pair)
             @test r ≈ b