diff --git a/.github/workflows/publish-testpypi.yml b/.github/workflows/publish-testpypi.yml
index d094cca..86edb5b 100644
--- a/.github/workflows/publish-testpypi.yml
+++ b/.github/workflows/publish-testpypi.yml
@@ -37,8 +37,8 @@ jobs:
         env:
           INPUT_TAG: ${{ inputs.tag }}
         run: |
-          if [[ ! "$INPUT_TAG" =~ ^v[0-9] ]]; then
-            echo "Invalid tag format: $INPUT_TAG (expected v[0-9]...)"
+          if [[ ! "$INPUT_TAG" =~ ^v?[0-9] ]]; then
+            echo "Invalid tag format: $INPUT_TAG (expected [v]N.N.N)"
             exit 1
           fi
           TAG_VERSION="${INPUT_TAG#v}"
diff --git a/.github/workflows/publish.yml b/.github/workflows/publish.yml
index e65c434..f0aae84 100644
--- a/.github/workflows/publish.yml
+++ b/.github/workflows/publish.yml
@@ -37,8 +37,8 @@ jobs:
         env:
           INPUT_TAG: ${{ inputs.tag || github.ref_name }}
         run: |
-          if [[ ! "$INPUT_TAG" =~ ^v[0-9] ]]; then
-            echo "Invalid tag format: $INPUT_TAG (expected v[0-9]...)"
+          if [[ ! "$INPUT_TAG" =~ ^v?[0-9] ]]; then
+            echo "Invalid tag format: $INPUT_TAG (expected [v]N.N.N)"
             exit 1
           fi
           TAG_VERSION="${INPUT_TAG#v}"