diff --git a/poetry.lock b/poetry.lock
index db1fa17..4214897 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -172,8 +172,8 @@ python-versions = "!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*,!=3.4.*,>=2.7"
 zipp = ">=0.5"
 
 [package.extras]
-docs = ["sphinx", "rst.linker"]
-testing = ["packaging", "importlib-resources"]
+testing = ["importlib-resources", "packaging"]
+docs = ["rst.linker", "sphinx"]
 
 [[package]]
 name = "incremental"
@@ -415,11 +415,11 @@ python-versions = "*"
 
 [[package]]
 name = "tomlkit"
-version = "0.7.0"
+version = "0.11.3"
 description = "Style preserving TOML library"
 category = "main"
 optional = false
-python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
+python-versions = ">=3.6,<4.0"
 
 [[package]]
 name = "towncrier"
@@ -491,12 +491,12 @@ python-versions = ">=3.6"
 more-itertools = "*"
 
 [package.extras]
-docs = ["sphinx", "jaraco.packaging (>=3.2)", "rst.linker (>=1.9)"]
+docs = ["rst.linker (>=1.9)", "jaraco.packaging (>=3.2)", "sphinx"]
 
 [metadata]
 lock-version = "1.1"
 python-versions = "^3.7"
-content-hash = "029e391a7f17a36e16d86433b044fd534c2ad9649c335c9c4911f12dff39315e"
+content-hash = "a08172d2eddb9c92b35a01d729e13e6d2fbb190c9bb6c42e6d788d13b6ef610b"
 
 [metadata.files]
 appdirs = [
@@ -763,8 +763,8 @@ toml = [
     {file = "toml-0.10.0.tar.gz", hash = "sha256:229f81c57791a41d65e399fc06bf0848bab550a9dfd5ed66df18ce5f05e73d5c"},
 ]
 tomlkit = [
-    {file = "tomlkit-0.7.0-py2.py3-none-any.whl", hash = "sha256:6babbd33b17d5c9691896b0e68159215a9387ebfa938aa3ac42f4a4beeb2b831"},
-    {file = "tomlkit-0.7.0.tar.gz", hash = "sha256:ac57f29693fab3e309ea789252fcce3061e19110085aa31af5446ca749325618"},
+    {file = "tomlkit-0.11.3-py3-none-any.whl", hash = "sha256:800628e7705ff7c7cc4395c29836c7073e55b9ec820e1fc696080f9c5591a789"},
+    {file = "tomlkit-0.11.3.tar.gz", hash = "sha256:0ace4c975e0f3e6f71be8a2d61fe568777f1634bc80abff642cd3323ce709a0d"},
 ]
 towncrier = [
     {file = "towncrier-21.3.0-py2.py3-none-any.whl", hash = "sha256:e6ccec65418bbcb8de5c908003e130e37fe0e9d6396cb77c1338241071edc082"},
diff --git a/pyproject.toml b/pyproject.toml
index 223d59c..f9e280e 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -19,7 +19,7 @@ classifiers = [
 
 [tool.poetry.dependencies]
 python = "^3.7"
-tomlkit = ">=0.5.3,<0.8.0"
+tomlkit = ">=0.5.3,<0.12.0"
 cleo = ">=0.7.2,<0.9.0"
 licensename = "^0.4.2"
 requests = "^2.21"