diff --git a/CHANGELOG.md b/CHANGELOG.md
index 1bcc93785..f2d494ab1 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -38,6 +38,7 @@
 - add option to exclude tower.yml from pipeline template ([#3134](https://github.com/nf-core/tools/pull/3134))
 - run nf-core lint `--release` on PRs to master ([#3148](https://github.com/nf-core/tools/pull/3148))
 - Add tests to ensure all files are part of a template customisation group and all groups are tested ([#3099](https://github.com/nf-core/tools/pull/3099))
+- Fixed release announcement hashtags for Mastodon ([#3099](https://github.com/nf-core/tools/pull/3176))
 
 ### Linting
 
diff --git a/nf_core/pipeline-template/.github/workflows/release-announcements.yml b/nf_core/pipeline-template/.github/workflows/release-announcements.yml
index 8fee061fd..035ed63bb 100644
--- a/nf_core/pipeline-template/.github/workflows/release-announcements.yml
+++ b/nf_core/pipeline-template/.github/workflows/release-announcements.yml
@@ -12,7 +12,7 @@ jobs:
       - name: get topics and convert to hashtags
         id: get_topics
         run: |
-          echo "topics=$(curl -s https://nf-co.re/pipelines.json | jq -r '.remote_workflows[] | select(.full_name == "${{ github.repository }}") | .topics[]' | awk '{print "#"$0}' | tr '\n' ' ')"  >> $GITHUB_OUTPUT
+          echo "topics=$(curl -s https://nf-co.re/pipelines.json | jq -r '.remote_workflows[] | select(.full_name == "${{ github.repository }}") | .topics[]' | awk '{print "#"$0}' | tr '\n' ' ')" | sed 's/-//g' >> $GITHUB_OUTPUT
 
       - uses: rzr/fediverse-action@master
         with:
diff --git a/tests/modules/test_lint.py b/tests/modules/test_lint.py
index 51c814b88..07e12924c 100644
--- a/tests/modules/test_lint.py
+++ b/tests/modules/test_lint.py
@@ -432,7 +432,7 @@ def test_modules_environment_yml_file_sorted_incorrectly(self):
         ) as fh:
             yaml_content = yaml.safe_load(fh)
         # Add a new dependency to the environment.yml file and reverse the order
-        yaml_content["dependencies"].append("z")
+        yaml_content["dependencies"].append("z=0.0.0")
         yaml_content["dependencies"].reverse()
         yaml_content = yaml.dump(yaml_content)
         with open(