diff --git a/Project.toml b/Project.toml
index 87f0be3..f65df0a 100644
--- a/Project.toml
+++ b/Project.toml
@@ -1,7 +1,7 @@
 name = "NeutralLandscapes"
 uuid = "71847384-8354-4223-ac08-659a5128069f"
 authors = ["Timothée Poisot <timothee.poisot@umontreal.ca>", "Michael Krabbe Borregaard <mkborregaard@sund.ku.dk>", "Michael David Catchen <michael.catchen@mail.mcgill.ca>", "Rafael Schouten <rafaelschouten@gmail.com>", "Virgile Baudrot <virgile.baudrot@posteo.net>"]
-version = "0.1.4"
+version = "0.1.5"
 
 [deps]
 DataStructures = "864edb3b-99cc-5e75-8d2d-829cb0a9cfe8"
@@ -10,16 +10,14 @@ HaltonSequences = "13907d55-377f-55d6-a9d6-25ac19e11b95"
 NaNMath = "77ba4419-2d1f-58cd-9bb1-8ffee604a2e3"
 NearestNeighbors = "b8a86587-4115-5ab1-83bc-aa920d37bbce"
 Random = "9a3f8284-a2c9-5f02-9a11-845980a1fd5c"
-Requires = "ae029012-a4dd-5104-9daa-d747884805df"
 Statistics = "10745b16-79ce-11e8-11f9-7d13ad32a3b2"
 StatsBase = "2913bbd2-ae8a-5f71-8c99-4fb6c76f3a91"
 
 [compat]
 DataStructures = "0.18"
+Distributions = "0.25"
+HaltonSequences = "0.2"
 NaNMath = "0.3, 1.0"
 NearestNeighbors = "0.4"
 StatsBase = "0.3, 0.34"
 julia = "1.9"
-HaltonSequences = "0.2"
-Distributions = "0.25"
-Requires = "1.3"
diff --git a/src/NeutralLandscapes.jl b/src/NeutralLandscapes.jl
index 8b66e1e..7d890af 100644
--- a/src/NeutralLandscapes.jl
+++ b/src/NeutralLandscapes.jl
@@ -55,11 +55,6 @@ export SpatiotemporallyAutocorrelatedUpdater
 export rate, variability
 export normalize
 
-using Requires
-function __init__()
-    @require SpeciesDistributionToolkit="72b53823-5c0b-4575-ad0e-8e97227ad13b" include(joinpath("integrations", "simplesdmlayers.jl"))
-end
-
 end # module
 
 
diff --git a/src/integrations/simplesdmlayers.jl b/src/integrations/simplesdmlayers.jl
deleted file mode 100644
index 378c196..0000000
--- a/src/integrations/simplesdmlayers.jl
+++ /dev/null
@@ -1,14 +0,0 @@
-@info "Loading NeutralLandscapes support for SimpleSDMLayers.jl..."
-
-"""
-    NeutralLandscapes.mask!(array::AbstractArray{<:Float64}, masklayer::T) where {T<:SimpleSDMLayers.SimpleSDMLayer} 
-
-Masks an `array` by the values of `nothing` in `masklayer`, where `masklayer` is
-a `SimpleSDMLayer`
-
-"""
-function NeutralLandscapes.mask!(array::AbstractArray{<:Float64}, masklayer::T) where {T<:SpeciesDistributionToolkit.SimpleSDMLayers.SimpleSDMLayer} 
-    I = findall(isnothing, masklayer.grid)
-    array[I] .= NaN
-    return array
-end
diff --git a/test/Project.toml b/test/Project.toml
index 04348f3..4e8527a 100644
--- a/test/Project.toml
+++ b/test/Project.toml
@@ -1,4 +1,3 @@
 [deps]
 SafeTestsets = "1bc83da4-3b8d-516f-aca4-4fe02f6d838f"
-SpeciesDistributionToolkit = "72b53823-5c0b-4575-ad0e-8e97227ad13b"
 Test = "8dfed614-e22c-5e08-85e1-65c5234f0b40"
diff --git a/test/integrations.jl b/test/integrations.jl
deleted file mode 100644
index 6a4c9b7..0000000
--- a/test/integrations.jl
+++ /dev/null
@@ -1,10 +0,0 @@
-using NeutralLandscapes
-using Test
-using SpeciesDistributionToolkit
-
-
-bbox = (left=-83.0, bottom=46.4, right=-55.2, top=63.7)
-temp = SimpleSDMPredictor(RasterData(WorldClim2, AverageTemperature); bbox...) 
-
-mpd = rand(MidpointDisplacement(), size(temp), mask=temp)
-@test findall(isnan, mpd) == findall(isnothing, temp.grid)
diff --git a/test/runtests.jl b/test/runtests.jl
index 2da45d1..dcabf80 100644
--- a/test/runtests.jl
+++ b/test/runtests.jl
@@ -2,5 +2,4 @@ using Test, SafeTestsets
 
 @time @safetestset "updaters" begin include("updaters.jl") end
 @time @safetestset "planar gradient" begin include("planar.jl") end
-@time @safetestset "integrations" begin include("integrations.jl") end
 @time @safetestset "rand" begin include("rand.jl") end