diff --git a/.github/workflows/CI.yml b/.github/workflows/CI.yml
index 89ec53f..cd8e511 100644
--- a/.github/workflows/CI.yml
+++ b/.github/workflows/CI.yml
@@ -6,6 +6,12 @@ on:
       - main
   pull_request:
 
+concurrency:
+  # Skip intermediate builds: always.
+  # Cancel intermediate builds: only if it is a pull request build.
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: ${{ startsWith(github.ref, 'refs/pull/') }}
+
 jobs:
   test:
     name: Julia ${{ matrix.version }} - ${{ matrix.os }} - ${{ matrix.arch }} - ${{ (matrix.python && 'system Python') || 'conda' }}
@@ -38,9 +44,6 @@ jobs:
           python-version: '3.x'
           architecture: ${{ matrix.arch }}
         if: matrix.python
-      # Limitation of pip: https://pythonot.github.io/index.html#pip-installation
-      - run: python -m pip install cython numpy
-        if: matrix.python
       - run: python -m pip install pot
         if: matrix.python
       - uses: julia-actions/setup-julia@v1
@@ -67,7 +70,7 @@ jobs:
           PYTHON: ${{ matrix.python }}
       - uses: julia-actions/julia-processcoverage@v1
         if: matrix.coverage
-      - uses: codecov/codecov-action@v1
+      - uses: codecov/codecov-action@v2
         if: matrix.coverage
         with:
           file: lcov.info
diff --git a/.github/workflows/Docs.yml b/.github/workflows/Docs.yml
index de026fa..47d567f 100644
--- a/.github/workflows/Docs.yml
+++ b/.github/workflows/Docs.yml
@@ -7,6 +7,12 @@ on:
     tags: '*'
   pull_request:
 
+concurrency:
+  # Skip intermediate builds: always.
+  # Cancel intermediate builds: only if it is a pull request build.
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: ${{ startsWith(github.ref, 'refs/pull/') }}
+
 jobs:
   docs:
     name: Documentation
@@ -16,14 +22,7 @@ jobs:
       - uses: julia-actions/setup-julia@v1
         with:
           version: '1'
-      - run: |
-          julia --project=docs -e '
-            using Pkg
-            Pkg.develop(PackageSpec(path=pwd()))
-            Pkg.instantiate()'
-        env:
-          PYTHON: ''
-      - run: julia --project=docs docs/make.jl
+      - uses: julia-actions/julia-docdeploy@v1
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
           DOCUMENTER_KEY: ${{ secrets.DOCUMENTER_KEY }}
diff --git a/.github/workflows/JuliaNightly.yml b/.github/workflows/JuliaNightly.yml
index 1879a04..24677c2 100644
--- a/.github/workflows/JuliaNightly.yml
+++ b/.github/workflows/JuliaNightly.yml
@@ -9,6 +9,12 @@ on:
       - main
   pull_request:
 
+concurrency:
+  # Skip intermediate builds: always.
+  # Cancel intermediate builds: only if it is a pull request build.
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: ${{ startsWith(github.ref, 'refs/pull/') }}
+
 jobs:
   test:
     name: Julia ${{ matrix.version }} - ${{ matrix.os }} - ${{ matrix.arch }} - ${{ (matrix.python && 'system Python') || 'conda' }}
@@ -35,9 +41,6 @@ jobs:
           python-version: '3.x'
           architecture: ${{ matrix.arch }}
         if: matrix.python
-      # Limitation of pip: https://pythonot.github.io/index.html#pip-installation
-      - run: python -m pip install cython numpy
-        if: matrix.python
       - run: python -m pip install pot
         if: matrix.python
       - uses: julia-actions/setup-julia@v1
diff --git a/.gitignore b/.gitignore
index 5d2e5b9..1c02e5e 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,6 +1,5 @@
 *.jl.*.cov
 *.jl.cov
 *.jl.mem
-/Manifest.toml
-/test/Manifest.toml
+Manifest.toml
 /docs/build/
diff --git a/docs/Manifest.toml b/docs/Manifest.toml
deleted file mode 100644
index bb59c6c..0000000
--- a/docs/Manifest.toml
+++ /dev/null
@@ -1,123 +0,0 @@
-# This file is machine-generated - editing it directly is not advised
-
-[[Base64]]
-uuid = "2a0f44e3-6c83-55bd-87e4-b1978d98bd5f"
-
-[[Conda]]
-deps = ["JSON", "VersionParsing"]
-git-tree-sha1 = "299304989a5e6473d985212c28928899c74e9421"
-uuid = "8f4d0f93-b110-5947-807f-2305c1781a2d"
-version = "1.5.2"
-
-[[Dates]]
-deps = ["Printf"]
-uuid = "ade2ca70-3891-5945-98fb-dc099432e06a"
-
-[[DocStringExtensions]]
-deps = ["LibGit2"]
-git-tree-sha1 = "a32185f5428d3986f47c2ab78b1f216d5e6cc96f"
-uuid = "ffbed154-4ef7-542d-bbb7-c09d3a79fcae"
-version = "0.8.5"
-
-[[Documenter]]
-deps = ["Base64", "Dates", "DocStringExtensions", "IOCapture", "InteractiveUtils", "JSON", "LibGit2", "Logging", "Markdown", "REPL", "Test", "Unicode"]
-git-tree-sha1 = "5acbebf1be22db43589bc5aa1bb5fcc378b17780"
-uuid = "e30172f5-a6a5-5a46-863b-614d45cd2de4"
-version = "0.27.0"
-
-[[IOCapture]]
-deps = ["Logging"]
-git-tree-sha1 = "1868e4e7ad2f93d8de0904d89368c527b46aa6a1"
-uuid = "b5f81e59-6552-4d32-b1f0-c071b021bf89"
-version = "0.2.1"
-
-[[InteractiveUtils]]
-deps = ["Markdown"]
-uuid = "b77e0a4c-d291-57a0-90e8-8db25a27a240"
-
-[[JSON]]
-deps = ["Dates", "Mmap", "Parsers", "Unicode"]
-git-tree-sha1 = "81690084b6198a2e1da36fcfda16eeca9f9f24e4"
-uuid = "682c06a0-de6a-54ab-a142-c8b1cf79cde6"
-version = "0.21.1"
-
-[[LibGit2]]
-deps = ["Base64", "NetworkOptions", "Printf", "SHA"]
-uuid = "76f85450-5226-5b5a-8eaa-529ad045b433"
-
-[[Libdl]]
-uuid = "8f399da3-3557-5675-b5ff-fb832c97cbdb"
-
-[[LinearAlgebra]]
-deps = ["Libdl"]
-uuid = "37e2e46d-f89d-539d-b4ee-838fcccc9c8e"
-
-[[Logging]]
-uuid = "56ddb016-857b-54e1-b83d-db4d58db5568"
-
-[[MacroTools]]
-deps = ["Markdown", "Random"]
-git-tree-sha1 = "6a8a2a625ab0dea913aba95c11370589e0239ff0"
-uuid = "1914dd2f-81c6-5fcd-8719-6d5c9610ff09"
-version = "0.5.6"
-
-[[Markdown]]
-deps = ["Base64"]
-uuid = "d6f4376e-aef5-505a-96c1-9c027394607a"
-
-[[Mmap]]
-uuid = "a63ad114-7e13-5084-954f-fe012c677804"
-
-[[NetworkOptions]]
-uuid = "ca575930-c2e3-43a9-ace4-1e988b2c1908"
-
-[[Parsers]]
-deps = ["Dates"]
-git-tree-sha1 = "c8abc88faa3f7a3950832ac5d6e690881590d6dc"
-uuid = "69de0a69-1ddd-5017-9359-2bf0b02dc9f0"
-version = "1.1.0"
-
-[[Printf]]
-deps = ["Unicode"]
-uuid = "de0858da-6303-5e67-8744-51eddeeeb8d7"
-
-[[PyCall]]
-deps = ["Conda", "Dates", "Libdl", "LinearAlgebra", "MacroTools", "Serialization", "VersionParsing"]
-git-tree-sha1 = "169bb8ea6b1b143c5cf57df6d34d022a7b60c6db"
-uuid = "438e738f-606a-5dbb-bf0a-cddfbfd45ab0"
-version = "1.92.3"
-
-[[PythonOT]]
-deps = ["PyCall"]
-path = ".."
-uuid = "3c485715-4278-42b2-9b5f-8f00e43c12ef"
-version = "0.1.4"
-
-[[REPL]]
-deps = ["InteractiveUtils", "Markdown", "Sockets", "Unicode"]
-uuid = "3fa0cd96-eef1-5676-8a61-b3b8758bbffb"
-
-[[Random]]
-deps = ["Serialization"]
-uuid = "9a3f8284-a2c9-5f02-9a11-845980a1fd5c"
-
-[[SHA]]
-uuid = "ea8e919c-243c-51af-8825-aaa63cd721ce"
-
-[[Serialization]]
-uuid = "9e88b42a-f829-5b0c-bbe9-9e923198166b"
-
-[[Sockets]]
-uuid = "6462fe0b-24de-5631-8697-dd941f90decc"
-
-[[Test]]
-deps = ["InteractiveUtils", "Logging", "Random", "Serialization"]
-uuid = "8dfed614-e22c-5e08-85e1-65c5234f0b40"
-
-[[Unicode]]
-uuid = "4ec0a83e-493e-50e2-b9ac-8f72acf5a8f5"
-
-[[VersionParsing]]
-git-tree-sha1 = "80229be1f670524750d905f8fc8148e5a8c4537f"
-uuid = "81def892-9a0e-5fdd-b105-ffc91e053289"
-version = "1.2.0"
diff --git a/src/lib.jl b/src/lib.jl
index 6e50f7e..0142528 100644
--- a/src/lib.jl
+++ b/src/lib.jl
@@ -222,9 +222,8 @@ julia> ν = [0.0, 1.0];
 
 julia> C = [0.0 1.0; 2.0 0.0; 0.5 1.5];
 
-julia> round.(sinkhorn2(μ, ν, C, 0.01); sigdigits=6)
-1-element Vector{Float64}:
- 0.95
+julia> round(sinkhorn2(μ, ν, C, 0.01); sigdigits=6)
+0.95
 ```
 
 It is possible to provide multiple target marginals as columns of a matrix.
@@ -258,17 +257,17 @@ in the Python Optimal Transport package. Keyword arguments are listed in the doc
 # Examples
 
 ```jldoctest
-julia> xsource = [1];
+julia> xsource = [1.0];
 
-julia> xtarget = [2, 3];
+julia> xtarget = [2.0, 3.0];
 
 julia> ε = 0.01;
 
 julia> empirical_sinkhorn_divergence(xsource, xtarget, ε) ≈
-       sinkhorn2([1], [0.5, 0.5], [1 4], ε) -
+       sinkhorn2([1], [0.5, 0.5], [1.0 4.0], ε) -
        (
            sinkhorn2([1], [1], zeros(1, 1), ε) +
-           sinkhorn2([0.5, 0.5], [0.5, 0.5], [0 1; 1 0], ε)
+           sinkhorn2([0.5, 0.5], [0.5, 0.5], Float64[0 1; 1 0], ε)
        ) / 2
 true
 ```