diff --git a/.github/workflows/create-release.yml b/.github/workflows/create-release.yml
index 39d078267f..a726a921a2 100644
--- a/.github/workflows/create-release.yml
+++ b/.github/workflows/create-release.yml
@@ -4,7 +4,7 @@ on:
   workflow_dispatch:
     inputs:
       tag:
-        description: "Release tag (e.g. 1.84.0, 1.84.0rc1, 1.84.0.dev42, 1.84.0.post1; legacy v1.83.10-stable still accepted)"
+        description: "Release tag (e.g. 1.84.0, 1.84.0rc1, 1.84.0.dev42, 1.84.0-dev.2, 1.84.0.post1; legacy v1.83.10-stable still accepted)"
         required: true
         type: string
       commit_hash:
@@ -46,9 +46,11 @@ jobs:
             const commitHash = process.env.COMMIT_HASH;
 
             // Mark RC / dev / nightly / alpha / beta tags as GitHub pre-releases.
+            // Accept both PEP 440 (`.dev`) and SemVer (`-dev`) separators so tags
+            // like `1.84.0.dev2` and `1.84.0-dev.2` are both detected.
             // PEP 440 post-releases (e.g. `1.84.0.post1`) and legacy `-stable[.patch.N]`
             // are stable maintenance releases, not pre-releases.
-            const isPrerelease = /(?:rc|nightly|alpha|beta|\.dev)/i.test(tag);
+            const isPrerelease = /(?:rc|nightly|alpha|beta|[-.]dev)/i.test(tag);
 
             const cosignSection = [
               `## Verify Docker Image Signature`,