diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index d8b77af..489dba6 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -5,6 +5,7 @@ on:
     branches:
     - 'main'
     - 'release-**'
+  workflow_dispatch:
 jobs:
   build:
     runs-on: ubuntu-latest
@@ -16,6 +17,7 @@ jobs:
           - "3.9"
           - "3.10"
           - "3.11"
+          - "3.12"
     name: Python ${{ matrix.python-version }}
     steps:
       - uses: actions/checkout@v3
diff --git a/pigar/__main__.py b/pigar/__main__.py
index d5f8560..8ae3c27 100644
--- a/pigar/__main__.py
+++ b/pigar/__main__.py
@@ -120,8 +120,9 @@ def gohome():
     'comparison_specifier',
     default='==',
     show_default=True,
-    type=click.Choice(['==', '~=', '>=', '>']),
-    help='Part of version specifier, e.g. `abc==1.0`(see PEP 440 for details).',
+    type=click.Choice(['==', '~=', '>=', '>', '-']),
+    help='Part of version specifier, e.g. `abc==1.0`(see PEP 440 for details).'
+         ' Can be `-` to completely remove version.',
 )
 @click.option(
     '--show-differences/--dont-show-differences',
diff --git a/pigar/dist.py b/pigar/dist.py
index 4d78e2c..5f3f3be 100644
--- a/pigar/dist.py
+++ b/pigar/dist.py
@@ -183,11 +183,13 @@ def contains_file(self, file):
     def as_requirement(
         self, operator: str = '==', spaces_around_operator: str = ''
     ) -> str:
-        req = ""
         if self.editable and self.url:
             req = f"-e {self.url}"
         else:
-            req = f"{self.name}{spaces_around_operator}{operator}{spaces_around_operator}{self.version}"
+            req = self.name
+            if operator != '-':
+                req += f"{spaces_around_operator}{operator}"\
+                       f"{spaces_around_operator}{self.version}"
         return "\n".join(list(self.comments) + [str(req)])
 
     def __str__(self) -> str:
diff --git a/requirements/py3.12.txt b/requirements/py3.12.txt
new file mode 100644
index 0000000..35ebc2c
--- /dev/null
+++ b/requirements/py3.12.txt
@@ -0,0 +1,9 @@
+# Automatically generated by https://github.com/damnever/pigar.
+
+# pigar/dist.py: 28
+aiohttp==3.9.0
+# pigar/__main__.py: 24
+# pigar/tests/test_cli.py: 9
+click==8.1.3
+# pigar/parser.py: 15
+nbformat==5.7.3