diff --git a/poetry.lock b/poetry.lock
index 2f94db9..9ac6e5f 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -761,4 +761,4 @@ type = ["pytest-mypy"]
 [metadata]
 lock-version = "2.1"
 python-versions = "^3.9"
-content-hash = "7d1940a61f15eb28630e5c74935e7b15e95fc48f6768a4f490d6ad5cb75604f7"
+content-hash = "282dcb01ac0d8a98f0f38e6d5efb26c8db3388900cb13cf70520a1e3b913b8f8"
diff --git a/pyproject.toml b/pyproject.toml
index 0d84277..daf532b 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -18,7 +18,7 @@ include = ["ni_python_styleguide/config.toml"]
 
 [tool.poetry.dependencies]
 python = "^3.9"
-pathspec = ">=0.11.1"
+pathspec = ">=0.11.1,<2.0"
 
 # Tools we aggregate
 flake8 = [
@@ -34,16 +34,16 @@ better-diff = "^0.1.3"
 
 # Additional support libraries
 # These dependencies were selected because they are already used by black.
-click = ">=7.1.2"
-toml = ">=0.10.1"
-isort = ">=5.10"
+click = ">=7.1.2,<9.0"
+toml = ">=0.10.1,<0.11"
+isort = ">=5.10,<10.0"
 
 # flake8 plugins should be listed here (in alphabetical order)
-flake8-black = ">=0.2.1"
-flake8-docstrings = ">=1.5.0"
-flake8-import-order = "^0.19.2"
-flake8-tidy-imports = ">=4.11.0"
-pep8-naming = ">=0.11.1"
+flake8-black = ">=0.2.1,<0.5"
+flake8-docstrings = ">=1.5.0,<2.0"
+flake8-import-order = ">=0.19.2,<0.20"
+flake8-tidy-imports = ">=4.11.0,<5.0"
+pep8-naming = ">=0.11.1,<0.16"
 
 # Rejected flake8 plugins should be listed here (in alphabetical order)
 # Also describe why it is rejected and/or add a link