diff --git a/src/python_inspector/resolve_cli.py b/src/python_inspector/resolve_cli.py
index b9013a55..8081effd 100644
--- a/src/python_inspector/resolve_cli.py
+++ b/src/python_inspector/resolve_cli.py
@@ -31,12 +31,19 @@
 
 TRACE = False
 
-__version__ = "0.6.3"
+__version__ = "0.6.4"
 
 DEFAULT_PYTHON_VERSION = "38"
 PYPI_SIMPLE_URL = "https://pypi.org/simple"
 
 
+def print_version(ctx, param, value):
+    if not value or ctx.resilient_parsing:
+        return
+    click.echo(f"Python-inspector version: {__version__}")
+    ctx.exit()
+
+
 @click.command()
 @click.pass_context
 @click.option(
@@ -155,6 +162,15 @@
     hidden=True,
     help="Enable debug output.",
 )
+@click.option(
+    "-V",
+    "--version",
+    is_flag=True,
+    is_eager=True,
+    expose_value=False,
+    callback=print_version,
+    help="Show the version and exit.",
+)
 @click.help_option("-h", "--help")
 def resolve_dependencies(
     ctx,
diff --git a/tests/data/default-url-expected.json b/tests/data/default-url-expected.json
index f83b36ed..3c76d875 100644
--- a/tests/data/default-url-expected.json
+++ b/tests/data/default-url-expected.json
@@ -2,7 +2,7 @@
   "headers": {
     "tool_name": "python-inspector",
     "tool_homepageurl": "https://github.com/nexB/python-inspector",
-    "tool_version": "0.6.3",
+    "tool_version": "0.6.4",
     "options": [
       "--specifier zipp==3.8.0",
       "--index-url https://pypi.org/simple",
diff --git a/tests/data/pinned-requirements.txt-expected.json b/tests/data/pinned-requirements.txt-expected.json
index c10bcae9..c062b454 100644
--- a/tests/data/pinned-requirements.txt-expected.json
+++ b/tests/data/pinned-requirements.txt-expected.json
@@ -2,7 +2,7 @@
   "headers": {
     "tool_name": "python-inspector",
     "tool_homepageurl": "https://github.com/nexB/python-inspector",
-    "tool_version": "0.6.3",
+    "tool_version": "0.6.4",
     "options": [
       "--index-url https://pypi.org/simple",
       "--python-version 38",
diff --git a/tests/data/setup/simple-setup.py-expected.json b/tests/data/setup/simple-setup.py-expected.json
index dbc91309..c98e78e4 100644
--- a/tests/data/setup/simple-setup.py-expected.json
+++ b/tests/data/setup/simple-setup.py-expected.json
@@ -2,7 +2,7 @@
   "headers": {
     "tool_name": "python-inspector",
     "tool_homepageurl": "https://github.com/nexB/python-inspector",
-    "tool_version": "0.6.3",
+    "tool_version": "0.6.4",
     "options": [
       "--index-url https://pypi.org/simple",
       "--python-version 27",
diff --git a/tests/data/single-url-except-simple-expected.json b/tests/data/single-url-except-simple-expected.json
index dd9809e0..fb8a3af9 100644
--- a/tests/data/single-url-except-simple-expected.json
+++ b/tests/data/single-url-except-simple-expected.json
@@ -2,7 +2,7 @@
   "headers": {
     "tool_name": "python-inspector",
     "tool_homepageurl": "https://github.com/nexB/python-inspector",
-    "tool_version": "0.6.3",
+    "tool_version": "0.6.4",
     "options": [
       "--specifier flask",
       "--index-url https://pypi.org/simple",
diff --git a/tests/data/single-url-expected.json b/tests/data/single-url-expected.json
index e72bcb25..1ee1150a 100644
--- a/tests/data/single-url-expected.json
+++ b/tests/data/single-url-expected.json
@@ -2,7 +2,7 @@
   "headers": {
     "tool_name": "python-inspector",
     "tool_homepageurl": "https://github.com/nexB/python-inspector",
-    "tool_version": "0.6.3",
+    "tool_version": "0.6.4",
     "options": [
       "--specifier zipp==3.8.0",
       "--index-url https://pypi.org/simple",
diff --git a/tests/data/tilde_req-expected.json b/tests/data/tilde_req-expected.json
index 47c58853..0eab59a1 100644
--- a/tests/data/tilde_req-expected.json
+++ b/tests/data/tilde_req-expected.json
@@ -2,7 +2,7 @@
   "headers": {
     "tool_name": "python-inspector",
     "tool_homepageurl": "https://github.com/nexB/python-inspector",
-    "tool_version": "0.6.3",
+    "tool_version": "0.6.4",
     "options": [
       "--specifier zipp~=3.8.0",
       "--index-url https://pypi.org/simple",
diff --git a/tests/test_cli.py b/tests/test_cli.py
index 94c4095f..26ed3b23 100644
--- a/tests/test_cli.py
+++ b/tests/test_cli.py
@@ -262,6 +262,12 @@ def test_passing_of_json_pdt_and_json_flags():
     run_cli(options=options, expected_rc=1)
 
 
+def test_version_option():
+    options = ["--version"]
+    result = run_cli(options=options)
+    assert "0.6.4" in result.output
+
+
 def test_passing_of_netrc_file_that_does_not_exist():
     options = ["--specifier", "foo", "--netrc", "bar.txt", "--json", "-"]
     run_cli(options=options, expected_rc=2)
diff --git a/tests/test_resolution.py b/tests/test_resolution.py
index 3235e6a0..d4938ed4 100644
--- a/tests/test_resolution.py
+++ b/tests/test_resolution.py
@@ -145,7 +145,7 @@ def test_without_supported_wheels():
         "pkg:pypi/hyperlink@21.0.0",
         "pkg:pypi/idna@3.3",
         "pkg:pypi/pycparser@2.21",
-        "pkg:pypi/setuptools@65.2.0",
+        "pkg:pypi/setuptools@65.3.0",
         "pkg:pypi/txaio@22.2.1",
     ]