diff --git a/.github/workflows/test-and-deploy.yml b/.github/workflows/test-and-deploy.yml
index 2f7b38e..feeb4a1 100644
--- a/.github/workflows/test-and-deploy.yml
+++ b/.github/workflows/test-and-deploy.yml
@@ -8,6 +8,11 @@ defaults:
   run:
     shell: bash
 
+env:
+  # regexr.com/7mmq7
+  TAG_REGEX: '^v(0|[1-9][0-9]*)(\.(0|[1-9][0-9]*))((a|b|rc)(0|[1-9][0-9]*))?(\.(dev|post)(0|[1-9][0-9]*))?$'
+  DEV_TAG_REGEX: '\.(dev|post)(0|[1-9][0-9]*)$'
+
 jobs:
 
   test:
@@ -78,9 +83,8 @@ jobs:
         id: validate
         run: |
 
-          # regexr.com/7mmq7
-          TAG_REGEX='^v(0|[1-9][0-9]*)(\.(0|[1-9][0-9]*))((a|b|rc)[1-9][0-9]+)?(\.(dev|post)[1-9][0-9]*)?$'
-          DEV_TAG_REGEX='\.(dev|post)[1-9][0-9]*$'
+          TAG_REGEX="${{ env.TAG_REGEX }}"
+          DEV_TAG_REGEX="${{ env.DEV_TAG_REGEX }}"
           TAG_NAME=${GITHUB_REF#refs/tags/}
           PACKAGE_VERSION=${{ needs.test.outputs.PACKAGE_VERSION }}
 
diff --git a/automata/__init__.py b/automata/__init__.py
index 8efe9d5..8479230 100644
--- a/automata/__init__.py
+++ b/automata/__init__.py
@@ -8,9 +8,10 @@
 # __author__ = 'Roy Levien' ;
 
 # See - http://www.python.org/dev/peps/pep-0440/
-# ^v(0|[1-9][0-9]*)(\.(0|[1-9][0-9]*))((a|b|rc)[1-9][0-9]+)?(\.(dev|post)[1-9][0-9]*)?$
+# ^v(0|[1-9][0-9]*)(\.(0|[1-9][0-9]*))((a|b|rc)(0|[1-9][0-9]*))?(\.(dev|post)(0|[1-9][0-9]*))?$
 # regexr.com/7mmq7
 # USE -
+# See - https://py-pkgs.org/07-releasing-versioning.html#version-numbering
 __release__ = '0.1'  # N(.N)*
 # USE - To indicate status of release, can be on any branch
 __pre_release__ = 'a3'  # aN | bN | rcN