diff --git a/.config/dotnet-tools.json b/.config/dotnet-tools.json
index ed069c9..0e01bac 100644
--- a/.config/dotnet-tools.json
+++ b/.config/dotnet-tools.json
@@ -15,7 +15,7 @@
       ]
     },
     "fable": {
-      "version": "4.0.0-snake-island-alpha-014",
+      "version": "4.0.0-snake-island-alpha-019",
       "commands": [
         "fable"
       ]
diff --git a/README.md b/README.md
index 011c8b8..914ba2e 100644
--- a/README.md
+++ b/README.md
@@ -30,7 +30,7 @@ how to deal with Python version handling.
 Prerequisite for compiling F# to Python using Fable:
 
 ```sh
-> dotnet tool install --global fable --version 4.0.0-snake-island-alpha-014
+> dotnet tool install --global fable --version 4.0.0-snake-island-alpha-019
 > dotnet add package Fable.Core --version 4.0.0-snake-island-alpha-007
 ```
 
diff --git a/examples/timeflies/poetry.lock b/examples/timeflies/poetry.lock
index 14419cb..c963fc0 100644
--- a/examples/timeflies/poetry.lock
+++ b/examples/timeflies/poetry.lock
@@ -4,12 +4,7 @@ version = "0.8.0"
 description = "Fable library for Python"
 category = "main"
 optional = false
-python-versions = "^3.8"
-develop = true
-
-[package.source]
-type = "directory"
-url = "fable_modules/fable-library"
+python-versions = ">=3.9,<4.0"
 
 [[package]]
 name = "fable-python"
@@ -17,11 +12,11 @@ version = "0.1.0"
 description = "Python bindings for Fable"
 category = "main"
 optional = false
-python-versions = "^3.9"
+python-versions = "^3.8"
 develop = true
 
 [package.dependencies]
-fable-library = ""
+fable-library = "^0.8.0"
 
 [package.source]
 type = "directory"
@@ -29,7 +24,7 @@ url = "fable_modules/fable-python"
 
 [[package]]
 name = "fsharp-control-async-rx"
-version = "1.6.1"
+version = "1.6.2"
 description = "Async Observables for F# and Fable"
 category = "main"
 optional = false
@@ -37,7 +32,7 @@ python-versions = ">=3.9,<4"
 develop = true
 
 [package.dependencies]
-fable-library = ">=0.7.0"
+fable-library = "^0.8.0"
 
 [package.source]
 type = "directory"
@@ -46,9 +41,12 @@ url = "fable_modules/fsharp-control-async-rx"
 [metadata]
 lock-version = "1.1"
 python-versions = "^3.9"
-content-hash = "9ad00f12227f18e36ca297125065785ba9fa41f301eba68b117a0a965b8034a8"
+content-hash = "db0f580c2ccd5fc8cd4bb94bd108b4420d5d3bb0cf34f568fa3e6d5c740cc14e"
 
 [metadata.files]
-fable-library = []
+fable-library = [
+    {file = "fable-library-0.8.0.tar.gz", hash = "sha256:ce47fc9438da626836a14127bd8ced1359b017cf34f550289f3201b19fb478e3"},
+    {file = "fable_library-0.8.0-py3-none-any.whl", hash = "sha256:16bd71b33064fe1c34d604f0a0180b5f61d530f0fd6c52f6f2ef3b30b6078f2e"},
+]
 fable-python = []
 fsharp-control-async-rx = []
diff --git a/examples/timeflies/pyproject.toml b/examples/timeflies/pyproject.toml
index 1efa6e0..5d69936 100644
--- a/examples/timeflies/pyproject.toml
+++ b/examples/timeflies/pyproject.toml
@@ -8,12 +8,11 @@ license = "MIT"
 
 [tool.poetry.dependencies]
 python = "^3.9"
-fable-library = ""
+fable-library = ">=0.8.0"
 fable-python = ""
 fsharp-control-async-rx = ""
 
 [tool.poetry.dev-dependencies]
-fable-library = {path = "./fable_modules/fable-library", develop = true}
 fable-python = {path = "./fable_modules/fable-python", develop = true}
 fsharp-control-async-rx = {path = "./fable_modules/fsharp-control-async-rx", develop = true}
 
diff --git a/poetry.lock b/poetry.lock
index e4c7ad2..de7cbc2 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -8,17 +8,17 @@ python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
 
 [[package]]
 name = "attrs"
-version = "21.4.0"
+version = "22.1.0"
 description = "Classes Without Boilerplate"
 category = "dev"
 optional = false
-python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
+python-versions = ">=3.5"
 
 [package.extras]
-dev = ["coverage[toml] (>=5.0.2)", "hypothesis", "pympler", "pytest (>=4.3.0)", "six", "mypy", "pytest-mypy-plugins", "zope.interface", "furo", "sphinx", "sphinx-notfound-page", "pre-commit", "cloudpickle"]
+dev = ["coverage[toml] (>=5.0.2)", "hypothesis", "pympler", "pytest (>=4.3.0)", "mypy (>=0.900,!=0.940)", "pytest-mypy-plugins", "zope.interface", "furo", "sphinx", "sphinx-notfound-page", "pre-commit", "cloudpickle"]
 docs = ["furo", "sphinx", "zope.interface", "sphinx-notfound-page"]
-tests = ["coverage[toml] (>=5.0.2)", "hypothesis", "pympler", "pytest (>=4.3.0)", "six", "mypy", "pytest-mypy-plugins", "zope.interface", "cloudpickle"]
-tests_no_zope = ["coverage[toml] (>=5.0.2)", "hypothesis", "pympler", "pytest (>=4.3.0)", "six", "mypy", "pytest-mypy-plugins", "cloudpickle"]
+tests = ["coverage[toml] (>=5.0.2)", "hypothesis", "pympler", "pytest (>=4.3.0)", "mypy (>=0.900,!=0.940)", "pytest-mypy-plugins", "zope.interface", "cloudpickle"]
+tests_no_zope = ["coverage[toml] (>=5.0.2)", "hypothesis", "pympler", "pytest (>=4.3.0)", "mypy (>=0.900,!=0.940)", "pytest-mypy-plugins", "cloudpickle"]
 
 [[package]]
 name = "colorama"
@@ -28,19 +28,6 @@ category = "dev"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
 
-[[package]]
-name = "fable-library"
-version = "0.8.0"
-description = "Fable library for Python"
-category = "main"
-optional = false
-python-versions = ">= 3.9, < 4.0"
-develop = true
-
-[package.source]
-type = "directory"
-url = "build/fable_modules/fable-library"
-
 [[package]]
 name = "iniconfig"
 version = "1.1.1"
@@ -123,19 +110,18 @@ python-versions = ">=2.6, !=3.0.*, !=3.1.*, !=3.2.*"
 [metadata]
 lock-version = "1.1"
 python-versions = ">= 3.9, < 4.0"
-content-hash = "62fed915dffc4a50bd630ea2c9e7378ce18497742eeecbaa8fb81a198ee8b665"
+content-hash = "abd68141e3acd087250e3abe39e63564bd0a86278af048729e90ccbbda39a869"
 
 [metadata.files]
 atomicwrites = []
 attrs = [
-    {file = "attrs-21.4.0-py2.py3-none-any.whl", hash = "sha256:2d27e3784d7a565d36ab851fe94887c5eccd6a463168875832a1be79c82828b4"},
-    {file = "attrs-21.4.0.tar.gz", hash = "sha256:626ba8234211db98e869df76230a137c4c40a12d72445c45d5f5b716f076e2fd"},
+    {file = "attrs-22.1.0-py2.py3-none-any.whl", hash = "sha256:86efa402f67bf2df34f51a335487cf46b1ec130d02b8d39fd248abfd30da551c"},
+    {file = "attrs-22.1.0.tar.gz", hash = "sha256:29adc2665447e5191d0e7c568fde78b21f9672d344281d0c6e1ab085429b22b6"},
 ]
 colorama = [
     {file = "colorama-0.4.5-py2.py3-none-any.whl", hash = "sha256:854bf444933e37f5824ae7bfc1e98d5bce2ebe4160d46b5edf346a89358e99da"},
     {file = "colorama-0.4.5.tar.gz", hash = "sha256:e6c6b4334fc50988a639d9b98aa429a0b57da6e17b9a44f0451f930b6967b7a4"},
 ]
-fable-library = []
 iniconfig = [
     {file = "iniconfig-1.1.1-py2.py3-none-any.whl", hash = "sha256:011e24c64b7f47f6ebd835bb12a743f2fbe9a26d4cecaa7f53bc4f35ee9da8b3"},
     {file = "iniconfig-1.1.1.tar.gz", hash = "sha256:bc3af051d7d14b2ee5ef9969666def0cd1a000e121eaea580d4a313df4b37f32"},
@@ -156,7 +142,10 @@ pyparsing = [
     {file = "pyparsing-3.0.9-py3-none-any.whl", hash = "sha256:5026bae9a10eeaefb61dab2f09052b9f4307d44aee4eda64b309723d8d206bbc"},
     {file = "pyparsing-3.0.9.tar.gz", hash = "sha256:2b020ecf7d21b687f219b71ecad3631f644a47f01403fa1d1036b0c6416d70fb"},
 ]
-pytest = []
+pytest = [
+    {file = "pytest-6.2.5-py3-none-any.whl", hash = "sha256:7310f8d27bc79ced999e760ca304d69f6ba6c6649c0b60fb0e04a4a77cacc134"},
+    {file = "pytest-6.2.5.tar.gz", hash = "sha256:131b36680866a76e6781d13f101efb86cf674ebb9762eb70d3082b6f29889e89"},
+]
 toml = [
     {file = "toml-0.10.2-py2.py3-none-any.whl", hash = "sha256:806143ae5bfb6a3c6e736a764057db0e6a0e05e338b5630894a5f779cabb4f9b"},
     {file = "toml-0.10.2.tar.gz", hash = "sha256:b3bda1d108d5dd99f4a20d24d9c348e91c4db7ab1b749200bded2f839ccbe68f"},
diff --git a/pyproject.toml b/pyproject.toml
index 266c11b..c5e186b 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -9,10 +9,8 @@ homepage = "https://fable.io"
 
 [tool.poetry.dependencies]
 python = ">= 3.9, < 4.0"
-fable-library = ""
 
 [tool.poetry.dev-dependencies]
-fable-library = {path = "./build/fable_modules/fable-library", develop = true}
 pytest = "^6.2.4"
 
 [tool.pyright]
diff --git a/src/pyproject.toml b/src/pyproject.toml
index 623d3dc..fa2ae82 100644
--- a/src/pyproject.toml
+++ b/src/pyproject.toml
@@ -8,7 +8,7 @@ license = "MIT"
 
 [tool.poetry.dependencies]
 python = ">= 3.9, < 4.0"
-fable-library = "^0.8.0"
+fable-library = ">=0.8.0"
 
 [tool.poetry.dev-dependencies]
 
diff --git a/test/TestBuiltins.fs b/test/TestBuiltins.fs
index d06dfbd..6d6206c 100644
--- a/test/TestBuiltins.fs
+++ b/test/TestBuiltins.fs
@@ -13,4 +13,4 @@ let ``test __name__ works`` () = __name__ |> equal "test_builtins"
 [<Fact>]
 let ``test write works`` () =
     let result = builtins.``open``("test.txt", OpenTextMode.Write)
-    result.write "ABC" |> equal 3
\ No newline at end of file
+    result.write "ABC" |> equal 3