diff --git a/poetry.lock b/poetry.lock
index ca5bfdc..7b177d3 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -23,7 +23,7 @@ optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
 
 [package.extras]
-dev = ["coverage[toml] (>=5.0.2)", "hypothesis", "pympler", "pytest (>=4.3.0)", "six", "zope.interface", "furo", "sphinx", "pre-commit"]
+dev = ["coverage[toml] (>=5.0.2)", "furo", "hypothesis", "pre-commit", "pympler", "pytest (>=4.3.0)", "six", "sphinx", "zope.interface"]
 docs = ["furo", "sphinx", "zope.interface"]
 tests = ["coverage[toml] (>=5.0.2)", "hypothesis", "pympler", "pytest (>=4.3.0)", "six", "zope.interface"]
 tests_no_zope = ["coverage[toml] (>=5.0.2)", "hypothesis", "pympler", "pytest (>=4.3.0)", "six"]
@@ -75,9 +75,9 @@ optional = false
 python-versions = ">=3.6,<4.0"
 
 [package.extras]
-pipfile_deprecated_finder = ["pipreqs", "requirementslib"]
-requirements_deprecated_finder = ["pipreqs", "pip-api"]
 colors = ["colorama (>=0.4.3,<0.5.0)"]
+pipfile_deprecated_finder = ["pipreqs", "requirementslib"]
+requirements_deprecated_finder = ["pip-api", "pipreqs"]
 
 [[package]]
 name = "more-itertools"
@@ -206,7 +206,7 @@ python-versions = "*"
 [metadata]
 lock-version = "1.1"
 python-versions = "^3.8"
-content-hash = "3a88ec03d61919f6dcee0ea74ea2dce9f8e54175e5bc28e6b8390057d42c9d65"
+content-hash = "8f27050efbddc9426b2cf0fcf394b8b429d23684e1f65f8a71f608a3a439caa8"
 
 [metadata.files]
 appdirs = [
diff --git a/pyproject.toml b/pyproject.toml
index d8a5577..b0e6077 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "python-soql-parser"
-version = "0.2.0"
+version = "0.2.1"
 description = "A pyparsing-based library for parsing SOQL statements"
 license = "MIT"
 readme = "README.md"
@@ -13,7 +13,7 @@ packages = [
 
 [tool.poetry.dependencies]
 python = "^3.8"
-pyparsing = "^2.4.7"
+pyparsing = ">=2.4.7, <4"
 
 [tool.poetry.dev-dependencies]
 pytest = "^5.2"